V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

3.8L turbo swap

Old 01-03-2013, 07:23 PM
  #201  
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Re: 3.8L turbo swap

I love this build!!! Im gonna do a 3.8 sport coupe one of these years when i finish my RS and you will hate me after i ask you so many questions lol
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Old 01-03-2013, 07:29 PM
  #202  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
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Re: 3.8L turbo swap

Thanks! No worries on the questions, I'll help out where I can.
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Old 01-24-2013, 08:02 PM
  #203  
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Re: 3.8L turbo swap

this looks awesome,I was curious if you had any pictures from under the car trans cross member, downpipe,etc and where the mounts are welded in as Im thinking on doing this in a 88 trans am GTA
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Old 01-26-2013, 07:03 PM
  #204  
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Re: 3.8L turbo swap

Originally Posted by Turbo V6 231 View Post
this looks awesome,I was curious if you had any pictures from under the car trans cross member, downpipe,etc and where the mounts are welded in as Im thinking on doing this in a 88 trans am GTA
I don't have many pics showing the underside, but I think I have some of the mounts and downpipe. I'll try to find them now.

Work has pretty much stopped on the car for the time being. My wife and I are expecting our first child in April, and we decided that now would be the time to renovate our house so it's done before the big day. I've been bust hanging drywall, painting and laying new floors. Too tired after that to turn wrenches on the car.
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Old 01-26-2013, 07:13 PM
  #205  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

I took a look at my pics, and I don't have any that show the motor mounts clearly or the downpipe. I'll try to get out the garage shortly and snap a few more pics for you. The trans crossmember is factory stock in the stock location. I mounted the trans to the engine, lowered it in as an assembly, bolted up the trans mount, and marked the location of the motor mounts. (I bolted the mounts to the engine and set the engine onto the K member and tack welded the mounts to the K member). Unbolt the motor mounts from the engine and the trans mount, pull out the engine/trans and either weld the lower motor mounts to the K member, or mark the location and drill holes and bolt them in.
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Old 02-18-2013, 07:40 PM
  #206  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

Well I've finally got the home renos mostly buttoned up, and the weather is finally starting to warm up a bit around here (had a few -34* days here). I hopfully can get out to the garage shortly and get back onto the camaro. My garage also needs an extreme makeover. It's filled with scrap lumber, flooring, paint cans plus all the car parts... it's a real mess. I'm hoping that by the end of the winter I will have the engine back in and can start working on the rear. We will see how it goes.
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Old 02-25-2013, 07:11 PM
  #207  
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Re: 3.8L turbo swap

I finally got some work done in the garage. I cleaned up my massive home reno mess left behind and got the first coat of body filler sanded. I hopfully can get out there for a bit tomorrow night and get a second coat of body filler on a couple of areas. I picked up some paint, but when I got home I realized I grabbed white instead of black, So I've got to exchange that. I'm really hoping to get rolling on it some more.
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Old 03-02-2013, 03:37 PM
  #208  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

I worked on the car a bit more. I got the body filler pretty much done... there is still one spot that needs a bit more smoothing. I've started researching paint and supplies... I even considered doing the rustoleum paint just for the engine bay... please don't ridicule, I've changed my mind. I went the the local autobody supply store and inquired about a single stage gloss black paint, reducer, primer, etc. and it will cost around $130.00. Unfortunately, they won't mix paint on Saturdays, so I'll have to call or drop in during the week to order. At least that gives me some time to do some final clean up and a thorough degreasing and masking. I had been hoping to have the primer done this weekend, but no such luck.
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Old 03-02-2013, 08:07 PM
  #209  
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Re: 3.8L turbo swap

I cant wait to see some finshed pics when you get it all done.
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Old 03-04-2013, 07:04 PM
  #210  
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Re: 3.8L turbo swap

I will snap some pics as soon as it's all painted. Its postponed a bit now, as the rear diff on my truck decided to spit it's guts out, so i'm in the process of gathering the parts to get that going again.
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Old 04-04-2013, 07:56 PM
  #211  
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Re: 3.8L turbo swap

I've taken a break from working on the engine bay, and have started my rear disc brake swap. I picked up some chevy blazer rear calipers from the local wrecking yard for only $5 a piece. I already had the rear rotors, and I will fabricate some mounting brackets. The rotors won't work with these calipers, so I will pick up a set of the larger 11.6" rotors. I will also be doing the corvette c4 front brake swap in the near future. An adjustable proportioning valve will help with the balance. Not sure about the master cylinder, will need to research that some more. pics:
Attached Thumbnails 3.8L turbo swap-p1020409.jpg   3.8L turbo swap-p1020410.jpg   3.8L turbo swap-p1020411.jpg  
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Old 04-04-2013, 08:01 PM
  #212  
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Re: 3.8L turbo swap

In the first pic above, the caliper on the right is how they arrived from the wreckers, and the one on the left is after I cleaned it all up and gave it a coat of caliper paint. Looks pretty good for a $5 caliper. The rear rotors are the 10.5" x 1" rotors, but I will need the 11.6" x .790" rotor as the caliper just barely fits over the 1" thick rotor. The blazer uses .790" rotors as well, so the later years camaro rotors should work. The brackets I will make will be similar to these ones.
Attached Thumbnails 3.8L turbo swap-p1020412.jpg   3.8L turbo swap-drumbpweb1.jpg  

Last edited by neilb; 04-04-2013 at 08:13 PM.
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Old 04-04-2013, 09:39 PM
  #213  
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Re: 3.8L turbo swap

Did you pull any of the Blazer caliper mount brackets to see how close they are to what you are doing?
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Old 04-04-2013, 09:46 PM
  #214  
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Re: 3.8L turbo swap

No I didn't, although I did think about it because the blazer uses an internal ebrake shoe style parking brake. The reason I didn't is the mounting bracket of the original drums would have to be cut off, and as silly as it may sound, I want the option of going back to drums if the need arises. I'm not sure what I'm going to do about the parking brake. My car is an automatic, so I rarely use it, but I would like one. I have seen setups that use a very small rotor bolted to one of the Ujoints and has a small cable pulled caliper, so that may be an option. We will see what I can dig up.
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Old 04-05-2013, 08:01 AM
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Re: 3.8L turbo swap

Gotcha. I bought a spare housing from an 84 Trans Am with disks so that I would have the easy 4 bolt flange, along with rebuilding it on the floor instead of having the car down while I do my magic.

I am still wondering if those plates pulled from the wrecking yard wouldn't save you a ton of time in fabricating since they have the proper mounts for the calipers on them. You might be able to hack and modify the lower end to mate to what you have. Also, they would make a perfect template for you to trace out on a new piece of plate for those mount hole locations.

Anyway, I can't wait to see how it ends up!
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Old 04-06-2013, 07:57 PM
  #216  
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Re: 3.8L turbo swap

Originally Posted by KrisW View Post
I am still wondering if those plates pulled from the wrecking yard wouldn't save you a ton of time in fabricating since they have the proper mounts for the calipers on them. You might be able to hack and modify the lower end to mate to what you have. Also, they would make a perfect template for you to trace out on a new piece of plate for those mount hole locations.
I didn't even think about using them as a template, that would have been a good idea. I have a plexiglass template fabbed up, but it still needs a bit of tweaking to fit perfectly. The only problem is my steel ralley rims won't clear the calipers without a small spacer. The Z28 rims will clear with just some very light clearancing of the caliper bracket just to be safe. If I had used the Blazer rotors, everything would have cleared fine, but the caliper mounting bracket would be much more difficult to fabricate, and cutting the backingplate flange would be unavoidable.
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Old 04-06-2013, 08:19 PM
  #217  
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Re: 3.8L turbo swap

Some pics of my plexiglass template. A third mounting bolt will be added, but I'm not sure where exactly just yet.
Attached Thumbnails 3.8L turbo swap-p1020416.jpg   3.8L turbo swap-p1020415.jpg   3.8L turbo swap-p1020417.jpg  
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Old 04-06-2013, 08:21 PM
  #218  
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Re: 3.8L turbo swap

more: Plus a shot of my car before I stripped it all apart.... I miss driving it already!
Attached Thumbnails 3.8L turbo swap-p1020413.jpg   3.8L turbo swap-p1020414.jpg   3.8L turbo swap-dscf3690.jpg  
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Old 04-29-2013, 09:16 PM
  #219  
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Re: 3.8L turbo swap

So I've been pretty lazy with working on my car, mainly due to the arrival of our first child, our little baby girl Keelyn! It won't be long until she's out in the garage helping her daddy out!

I managed to get out into the garage for a few minutes tonight to test fit my brake flex hose brackets. I still haven't finalized the caliper anchors, only because I'm starting to consider using the complete blazer backing plates and ebrakes. I may call the local wreckers to see if they have any suitable backing plates to try. I'm hoping to get back onto the engine bay and get it finished up, just so I can get the engine back in to free up some work space in the garage. Between two rear ends, two trannys, an engine and all my other junk, I'm running out of space in my tiny garage!
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Old 05-13-2013, 08:20 PM
  #220  
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Re: 3.8L turbo swap

Update:

Finally made it out to the garage today and painted the engine bay! I ended up choosing a semi gloss black. It turned out not too bad, although it did reveal a few spots that should have had a bit more sanding prep done, but once the engine is installed most of those spots won't even be seen. I'm pretty pleased with the results. Pics coming!

I also decided to go with the blazer backing plates (or at least give them a try), as suggested by Krisw. I have a set coming from the the wreckers tomorrow, so I will see how everything lines up. My only concern is the spacing between the axle flange and the axle tube flange. It must be the same from the blazer rear end to the camaro, or else the rotors won't fit, and the ebrake shoes won't work. So we will see tomorrow night how everything lines up. I will also need to come up with a way to run the ebrake cables, but that shouldn't be too hard. I'm pretty excited that I'm finally making some progress. Once the diff is done and back under the car, the engine and trans can go back in and I can work on tucking the wiring harness out of sight... can't wait!
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Old 05-13-2013, 10:13 PM
  #221  
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Re: 3.8L turbo swap

Congratulations on a healthy baby girl! Keep her involved and it will pay off down the road when she's older in respect for your values.

As to the car, I'm jealous. I can't get 5 minutes to fix any of mine! I'd like to especially see the pictures of your motor mounts when you do snap some off for the engine bay series of photos that are coming.
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Old 05-19-2013, 09:35 PM
  #222  
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Re: 3.8L turbo swap

I will try to get some pics snapped shortly. I have run into a snag with my disc brake swap. The local wrecking yard isn't willing to take apart a complete diff just to sell me the disc brake brackets. To say that I was pissed was an understatement. So a bit of luck came around though, and my coworker is replacing his backing plates and ebrake setup on his '03 silverado, which use a similar setup to the blazer, but a bit bigger. He is giving me his old set up to see If I can get it to work. I can get new aftermarket blazer backing plates, but for a cost of nearly $200.00 per side, more than I want to spend. Really sucks because at first the wrecking yard only wanted $20.00 for each side.

The engine bay is starting to get put back together slowly, but hopfully I can get the engine back in soon.
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Old 05-20-2013, 12:04 AM
  #223  
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Re: 3.8L turbo swap

you should just buy these then:

http://www.flynbye.com/catalog/i30.html
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Old 05-21-2013, 08:42 PM
  #224  
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Re: 3.8L turbo swap

So I got the backing plates from my coworker today and tried mocking them up. 1st problem: mounting flange on the diff is too small to accomodate the silverado backing plate bolt pattern, 2nd problem: the larger truck ebrake shoes won't clear the blazer rotor. The truck rotors would be too large for a 15" wheel, not to mention a 6 bolt pattern. 3rd problem: The blazer caliper anchors don't mate to the truck backing plates. So, it seems these are a no go. I am getting frustrated with all of this, I was trying to do something a bit diferent, but i've been stopped by some lazy wrecking yard employees. I wish there was a pull-your-own yard near here. The adaptors from Flynbye really would be the easiest route, but I thought I'd be creative. I really do feel like the bazer stuff would work great, If I could get my hands on them!
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Old 05-22-2013, 09:54 AM
  #225  
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Re: 3.8L turbo swap

hows it comeing??
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Old 05-23-2013, 06:33 PM
  #226  
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Re: 3.8L turbo swap

Its coming along slowly. I have pretty much given up on the disc swap for the time being anyway. I will work away on the rest of the car when I can. It is difficult to find the time with a new baby in the house. My next step is to put the rear end back under the car to get it rolling again, then I'll tackle swapping in the new tranny and drop the motor back in. I promise I'll post pics soon. I'm taking my time painting parts and hardware as I go. This is the last time I want to tear apart my engine bay for a while.
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Old 06-14-2013, 06:24 PM
  #227  
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Re: 3.8L turbo swap

So, another small update. I finally picked up a torque converter. I got a reman unit through work with a stall of 2400rpm. It was for a good price, try only $360.00 with a warranty and no shipping or duty fees. We will see how it feels. Now I can start putting the engine back in. I'll start that tomorrow.
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Old 06-16-2013, 03:35 PM
  #228  
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Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

So I finally got a chance to work out in the garage for a bit, and thought I'd better share on my progress. I installed the new torque converter (sorry no pics yet) and headed over to my local speed shop to pick up some 6an fittings and exhaust wrap. They had neither in stock so I had to order them in. They won't be here until Tues, so putting the engine back in has been delayed again. So while I am waiting, I thought I'd tackle another job that has been floating in the back of my mind for some time now. I wanted to run a Fuel pump hotwire kit, but didn't like the sticker price of the piece, so I decided to make my own. In just a couple of hours and some wiring/connectors from the old 2.8l harness, I had my own hotwire kit. I still need one connector that I didn't have at home, but I'm pretty sure I have one at work. For those who haven't seen the hotwire kit, it runs the fuel pump directly off the output at the alternator using a sealed relay, a 30amp fuse, and some heavier gauge wiring. It eliminates the high voltage drop across the factory fuel pump harness. I'm pretty pleased with the results so far. We will see how it works soon. The kit is available from Caspers Electronics or Fullthrottlespeed.com for the Buick grand nationals and have proven to increase the output of the factory and aftermarket fuel pumps.

I also managed to pick up a new toy for a future project. Maybe in this car, or maybe in something else. Time will tell. A 5.3l LS engine from an '08 Chevy Silverado, complete and running. Best part, is it only cost me buying my boss lunch one day!

So once my fittings and the exhaust wrap arrives, I can finally reinstall the engine and finish cleaning up the wiring harness and fire this baby up! I miss the turbo 6 like crazy!
Attached Thumbnails 3.8L turbo swap-enginebay.jpg   3.8L turbo swap-dscf3911.jpg   3.8L turbo swap-dscf3913.jpg  
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Old 06-16-2013, 03:36 PM
  #229  
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Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

here's the hotwire kit. I included the diagram that I made up so if anyone in interested in making their own feel free to use my schematic. Ignore the wire colours though as those are specific to my harness. The wire locations are correct to the factory connectors... at least on my '86. Not sure on other years or engine setups. I included a pic of how it's installed under the car... a shot of a buick, but you get the idea.
Attached Thumbnails 3.8L turbo swap-dscf3921.jpg   3.8L turbo swap-dscf3923.jpg   3.8L turbo swap-0908gmhtp_23_z-1987_buick_grand_national_simple_bolt_ons_install-gas_tank.jpg  

Last edited by neilb; 06-16-2013 at 03:50 PM. Reason: added more info
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Old 06-16-2013, 03:38 PM
  #230  
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Re: 3.8L turbo swap

Here's the 5.3l (wrong forum I know, but just a side note lol)
Attached Thumbnails 3.8L turbo swap-dscf3914.jpg   3.8L turbo swap-dscf3917.jpg   3.8L turbo swap-dscf3919.jpg  
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Old 06-18-2013, 07:08 PM
  #231  
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Re: 3.8L turbo swap

Well, I got the engine in tonight! It looks pretty good sitting in there, now I just can't wait to fire it up. I took off from work early today to get a head start on dropping in the engine. I picked up my fittings and exhaust wrap and got to work. I wrapped the downpipe and the Y pipe, and then discovered the fittings I ordered were wrong, so I'll have to return those and order the proper ones. The batteries died in my camera, so I'll take pics shortly.
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Old 07-20-2013, 06:28 AM
  #232  
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Re: 3.8L turbo swap

Finally, I've been looking for awhile for someone who did this swap. I am also interested in this swap on my 88 base model 2.8 efi camaro. any input would be amazing. I can get any info on my end to you if needed to get further assistance from you. IF that is you have the time it will be greatly appreciated by another f-body enthusiast
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Old 07-23-2013, 08:36 PM
  #233  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

Originally Posted by johnny88camaro View Post
Finally, I've been looking for awhile for someone who did this swap. I am also interested in this swap on my 88 base model 2.8 efi camaro. any input would be amazing. I can get any info on my end to you if needed to get further assistance from you. IF that is you have the time it will be greatly appreciated by another f-body enthusiast
Glad to hear there is another buick swapper. I can try to answer whatever questions come up in your build, as best as I can. There are others who have done this swap, and any GM info on the Turbo Trans Am would apply to the Camaro as well. All in all the hardest part of the swap is the wiring, and that just takes time.
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Old 07-23-2013, 08:42 PM
  #234  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

Not much has been happening with the car the last few weeks. I've been busy with work, family, and summer beer drinking. In the process of installing my new tranny lines, I broke off the fitting in the rad for the tranny cooler.... so now I'm down a rad. I will grab a new rad after my holidays are over. After that its just reinstall the brake booster and master cylinder, and run new brakelines along the rear axle. Bits and pieces here and there, and soon she'll be done.
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Old 10-23-2013, 08:55 PM
  #235  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

Well, I've been making some small progress in the past couple of months. I still haven't replaced the rad, only because I am saving up for an all aluminum unit for better looks and performance. I did manage to finish cleaning up some wiring, vacuum hoses and other odds and ends. I also finally got my old ralley wheels cleaned up and painted. They turned out pretty decent, and look good with the two new 215/70/15 goodyear tires up front. I still have to mount up my mickey thompsons on the back. That will happen later on this week. My goals for the winter will be getting the car running after I get the new rad, and taking it to my work to weld in some new floor pans and patching the rear wheel tubs. I will snaps some pics once the rear tires are mounted up.
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Old 01-05-2014, 08:18 AM
  #236  
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Car: 92 camaro rs
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Re: 3.8L turbo swap

very cool ever think about making wiring for other guys ??
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Old 01-05-2014, 09:24 AM
  #237  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

Thanks, No I haven't thought about it. It's very time consuming, and wouldn't be worth the money I would have to charge. Caspers electronics makes a direct swap harness for v8 Camaros to the buick 6. And they make custom harnesses to your specs for other applications.

On another note, I'm finally making some progress again. I ordered my new rad, a Motomisho all aluminum rad, and a set of reproduction Buick Grand National rad hoses.

I have been in contact with a seller of the Hurst dual gate shifter, trying to figure out shipping costs. The unit is pretty expensive, and I can only afford it if the shipping is reasonable.

The rad should arrive in just a couple of days, and the hoses in a week or so.
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Old 01-05-2014, 09:33 AM
  #238  
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Re: 3.8L turbo swap

That 2400 stall is too tight for that turbo. Unless you are stroked. Maybe think about trading the turbo for a TA49 or TE44. Are you using GN heads?
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Old 01-05-2014, 09:38 AM
  #239  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

I was looking for a 2800 stall, but just couldn't afford the unit I wanted at the moment. I got this one locally for a great price, and figured it will do for now. It should be miles better than the factory Camaro converter that was in it.

Yes I'm running the stock buick heads, with some minor valve work.
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Old 01-05-2014, 09:53 AM
  #240  
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Re: 3.8L turbo swap

Originally Posted by neilb View Post
I was looking for a 2800 stall, but just couldn't afford the unit I wanted at the moment. I got this one locally for a great price, and figured it will do for now. It should be miles better than the factory Camaro converter that was in it.

Yes I'm running the stock buick heads, with some minor valve work.
Your gonna hate how long it will take to spool that turbo with the stall you have. I would keep the stall and put a stock GN turbo on it for initial testing. Get the car running good and then start upgrading stall and turbo as money comes in. Combo/Tune is key to these motors. Im sure you have already been on Turbobuick.com , but I would post there and tell them what your doing and your goals. That alone will help tremendously and you will find all kinds of parts for sale at good prices.
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Old 01-05-2014, 10:58 AM
  #241  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

you are right about the spool-up, it was deadly slow with the previous converter. My stock downpipe is also holding me back, and that will be fixed shortly. Once the turbo spools, she pulls hard!
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Old 01-05-2014, 11:26 AM
  #242  
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Car: 1991 Camaro RS
Engine: SBC 385, AFR Heads, 11.1:1
Transmission: Hughes TH350 Trans Brk.PTC5KStall
Axle/Gears: Strange S60 4:10s
Re: 3.8L turbo swap

I know we have different set ups and engines but I agree that you will love a 2800-3200 converter. Mine flashes at or close to 3k depending on my launch and what I foot brake. But it spools very fast with almost no lag off the line.

What sort of stock down pipe do you have on there? Is this a car you want to race or just keep it as a street only car. You could always just put a nice cut out on it if the exhaust is somewhat efficient for the first few feet of pipe after the headers. Just a thought.

I like reading about your build keep it up bud, it's looking nice.
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Old 01-05-2014, 01:16 PM
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Re: 3.8L turbo swap

Dont worry too much about downpipes. Port the stock one and it will be good for your needs at the moment. From the looks of the parts list you have,im guessing your looking for mid to high 11's?
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Old 01-19-2014, 03:26 PM
  #244  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

It seems the general consensus is I jumped the gun on buying the 2400 converter. Unfortunately I can't afford to get another right now, but maybe in a few months.

The downpipe is the stock GN pipe modified to fit the f body platform. I believe the pipe is only 2 1/4" which merges into a 2 3/4" dyno max cat back system. I have heard that porting the stock DP elbow helps lots. I really want to upsize my entire system to 3.5 or 4" from turbo back similar to the mufflex system.

I have managed to make some progress lately, I bought a new rad from motomisho (summit racing), and love it! great quality and fit! I also finally replaced those lousy looking universal rad hoses with some silicone reproductions of the GN hoses. I changed the oil, filled the PS reservoir and charged the battery. I fired her up for the first time in almost 2 years! Good to hear it run again. I ran out of trans fluid, so I shut it down as I didn't want to damage anything in the trans. I have a small leak from the port for the coolant level sensor, I'll need to find a better plug for that port.

I have new coolant overflow and washer fluid bottles on order from hawksthirdgen, along with the plastic filler panel for around the hood latch area.

It ran not too bad, although it does have a random back fire and rough idle (stale gas maybe?) I am worried about a noise coming from the front of the engine... can't tell if its from the timing cover, power steering pump, or belt? I suppose if I remove the belt it would help determining where its coming from.
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Old 01-19-2014, 03:29 PM
  #245  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

Originally Posted by t-top89 View Post
Dont worry too much about downpipes. Port the stock one and it will be good for your needs at the moment. From the looks of the parts list you have,im guessing your looking for mid to high 11's?
Somewhere in the 11's would be great, When I had the chip done at turbo tweak, I said my goal was mid 12's. Now that I have done a few more mods, I should have the chip updated to take advantage.
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Old 01-19-2014, 03:46 PM
  #246  
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Re: 3.8L turbo swap

You can always add fuel in the TT chips. Thats all Eric really needs is a general ET to set the VE tables. His very first chip that came out in 2002-2003 that I ran was burned for only 12 sec car. I went 11.3's on it with alky. He sets you up with initial tune and you go from there. Once you start approaching max fuel %, time to send it back in. I dont worry about that with the SD2 chip tho. Its a mini XFI.
Get a scanmaster and powerlogger to help diagnose problems on the internet. They will be worth their weight in gold.
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Old 01-19-2014, 03:57 PM
  #247  
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Join Date: Oct 2005
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

I'm using TunerPro RT for data logging and diagnostics, but I would like to get a scanmaster as well. A wideband 02 and gauge would be a nice addition too... all in good time.
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Old 01-30-2014, 11:27 AM
  #248  
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Car: 91 Firebird 'vert, 91 Formula
Engine: 5.7, 5.0
Transmission: T56, T5
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Re: 3.8L turbo swap

This is a cool build! I happened on this accidently while doing a search for "tailshaft". lol
Anyway, while on the back burner now, I am planning to put an LC2 in my '70 Skylark Convertible. I still need to either buy it or build it, but have been doing some periodic "day dreaming" research on LC2 swaps. To my surprise, very little info over on turbobuicks.com but looks like there are a good amount of people on here who have done it. Not that I have any anticipation of it being a hard swap, always good to have as much info as possible.
I have to go through this thread more closely, so I apologize if this was touched on at all, but how does the 3.8 turbo work with the 700R4? I'm starting the T56 swap in my firebird and was thinking I'll just sit on the 700R4 that's coming out as the car only has 50K miles on it. I know the 2004R ratios were a little tighter than the 700R4, not that it's probably noticable with your 4.11's.
Again, awesome build. A belated congratulations for the birth of your daughter as well. They do take up a lot of time, I now have 3 girls ages 5, 3 and 8 months tomorrow (Hence why the Buick project is now on hold!), but they're totally worth it.
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Old 02-01-2014, 09:29 AM
  #249  
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Join Date: Oct 2005
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

Thanks for the compliments! I am having lots of fun building this car, and am always looking at ways to improve things. My daughter is now almost 10 months old, and we are loving every minute of it! She certainly takes after me, as she loves watching drag racing videos and such on You tube!

Your 70 skylark project sounds really cool, and would be such a unique ride. I don't have much (none actually) experience on the skylarks, but the physical fitment of the 3.8 in the Camaro was really quite simple. The 700r4 seems to work well (must be used with a bellhousing adaptor) I have never driven a turbo 3.8 with the 2004r, so I don't have anything to compare it with. I have heard that the lower 1st gear of the 700r4 can hurt spool up, but I would think that the proper rear gear and torque converter would correct that (As I am currently learning now lol)

As for an update:

I recently scored a dual fan cooling fan/shroud from an '01 Olds Alero. The fitment couldn't have been any better!!!! It fit between the rad tanks PERFECTLY, it mounted up the the rad using just some small 90* brackets I had and almost looks factory. The wiring is a bit complicated, as it uses 3 relays to have both fans on at 1/2 speed for low, and both fans on full speed for high. The other challenge is the Alero relays are ground side switched, where the turbo buick harness is hot side switched. Not a huge problem, but it took some thinking to figure it out. I will use the factory high/low fan relays to trigger the 3 Alero relays to completely eliminate the heavy load off the factory wiring. I haven't made the wiring yet but will be doing that soon. I have to modify the turbo cold side piping to clear the larger rad and cooling fans, but that is working out fine. Just a few cuts to make and two extra silicone couplers.
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Old 02-01-2014, 09:37 AM
  #250  
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Car: 1986 sports coupe, 1984 F41
Engine: 3.8L Turbo SFI, stock 305
Transmission: 700 R4, 700 R4
Axle/Gears: 3.42:1, 3.08:1
Re: 3.8L turbo swap

Here is the Alero fan wiring, I will change, where the ECM ground the relays, will be the 12v from the factory fan relays, and where the Alero relays get the 12v will be the ground, on the control side of the relay only. (Essentially switching it from ground side switched to hot side switched).
Attached Thumbnails 3.8L turbo swap-aler017a.png  
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