1986 Iroc Procharged 408 - Page 2 - Third Generation F-Body Message Boards


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1986 Iroc Procharged 408

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Old 08-16-2016, 04:00 PM   #51
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Re: 1986 Iroc Procharged 408

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Here's a few pics of the trans crossmember installed. It turned out o.k. Like I said, I think I'm just going to make one after everything is running. I want to incorporate all 3 holes to help with some strength, since the torque arm mount is a decent cantilever from the hole locations.
I think it is going to be too flimsy and it will twist. Better to take care of it now before something breaks.
Need to beef up the whole cross-brace. Extra bolt holes to the chassis aren't enough.
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Old 08-18-2016, 01:36 PM   #52
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Re: 1986 Iroc Procharged 408

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Interesting spot for filter. Most ones I've seen just has filter off the back of the charger.
Well, there's definitely no room right off the procharger, it would be a very small filter. The headers are pretty big, plus the brake master.
I'm not thrilled about running that much pipe (it is 3.5" dia) but at least I can use a very large filter.

Qwk-
Yea, I'm not happy with the current design. I'm not going to be launching this thing at the track anytime soon so it will handle just around town cruising while I get the basics ironed out.
I really want to make something that is fully boxed and maybe some C-channel that wraps around the frame rails or something. I have a rough idea in my head, but I'll see what I can come up with over winter.
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Old 09-21-2016, 09:17 AM   #53
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Re: 1986 Iroc Procharged 408

Hey any updates? Finally started on my swap.


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Old 09-27-2016, 10:20 AM   #54
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Re: 1986 Iroc Procharged 408

indebt, looking good man!!

I've finished the piping for the procharger. Working on a bunch of small misc. stuff.
Started the wiring...not my favorite, but it's sort of necessary...lol.

However, I'm taking a small break to build and finish my garage. It's a 36 x 24 (3) car. We got the foundation and slab poured last week. Started framing today.
Soon I will be "Indebt" hahaha.

Hoping to get back at this winter and have it running in the spring time. The biggest thing left is the wiring, which I keep putting off.
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Old 09-27-2016, 01:17 PM   #55
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Re: 1986 Iroc Procharged 408

Wiring really doesn't take that long, just a lot to take in at one time. Are you converting the car harness or making your own with fuse/relay panels and stuff?
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Old 09-27-2016, 08:31 PM   #56
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Re: 1986 Iroc Procharged 408

Sounds like good progress. Yeah I'm not looking forward to wiring but it shouldn't be bad I hope, and got a few friends that can help.

Congrats on the garage. I just built a 30x32, 10ft walls, white metal inside except back wall. One 18x8 insulated door with a Liftmaster 8500 opener (cleaner look). If you have any questions or need tips just ask. Also, check out garagejournal.com if you haven't already. Here's mine.





Last edited by indebt; 09-27-2016 at 08:57 PM.
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Old 09-28-2016, 07:21 AM   #57
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Re: 1986 Iroc Procharged 408

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Originally Posted by indebt View Post
Sounds like good progress. Yeah I'm not looking forward to wiring but it shouldn't be bad I hope, and got a few friends that can help.

Congrats on the garage. I just built a 30x32, 10ft walls, white metal inside except back wall. One 18x8 insulated door with a Liftmaster 8500 opener (cleaner look). If you have any questions or need tips just ask. Also, check out garagejournal.com if you haven't already. Here's mine.




I would love to have that kind of room to work on mine. My little two car garage gets pretty cramped once you add kids bikes, four wheeler, lawn mower, and the list goes on.

Very nice!
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Old 09-28-2016, 12:21 PM   #58
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Re: 1986 Iroc Procharged 408

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I would love to have that kind of room to work on mine. My little two car garage gets pretty cramped once you add kids bikes, four wheeler, lawn mower, and the list goes on.

Very nice!
Thanks. Luckily, the house we bought also had a 10x12 shed so all yard stuff and storage stays in there. It definitely helps.
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Old 09-29-2016, 07:36 PM   #59
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Re: 1986 Iroc Procharged 408

Great looking build you have there. Been away from the board doing other projects myself so missed the ongoing updates, but just read through your whole build thus far. I am in progress on pretty much the same setup, which I am planning to get back on the project in the next month myself.

Couple things I noticed that you may want to consider are placing the brake lines behind steering shaft to keep them away from the heat of the header. The other thing I noticed is you are running your fuel supply to one of the fuel rails and I am assuming you are going to install the backpressure reg off the other rail. You may want to consider a Y connection on both the supply and returns to ensure you have equal fuel pressure across both rails. She will be pulling a lot of fuel at WOT and could cause fuel pressure issues in the current layout.

For the air filter, I have seen some run straight back from the supercharger using two 45s to elevate the filter above the valve cover. Going to look into that option when I get there.

Was wondering if you had any T56 magnum install issues? From the research I have done, I thought there were some special mods that needed to be done for our application? Hawks sells a nice replacement shift guide for the console if you want it to be correct for the trans.

Would you mind sharing the power steering pump and steering box adapter fittings part numbers? Not even close to that part myself yet, but would save me some searching.

Keep up the great work!
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Old 10-05-2016, 01:27 PM   #60
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Re: 1986 Iroc Procharged 408

indebt, nice garage! I like that door. We went with 8' tall doors as well and I'm glad we did.

HP - I've changed my air filter location. It's tight, but it fits between the master and the valve cover. I'll get some pics soon.

No issues with the Magnum. It's just big and heavy. It takes up all the room in the trans tunnel. Had to open up the rear of the stock shifter opening by ~ 2" . The shifter sits perfectly centered in the console. My car was originally a manual car too if that matters.

I guess I should rephrase my complaint about wiring. I can do it successfully. It's just one of those jobs I don't really "like" to do. Whereas I like installing headers or supercharger. I can never get myself excited about installing fan relays or something, haha.

I think these are the fittings I used for the steering box. It was a long time ago I bought them.
EAR-961955ERL
EAR-961956ERL
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Old 10-05-2016, 07:56 PM   #61
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Re: 1986 Iroc Procharged 408

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I guess I should rephrase my complaint about wiring. I can do it successfully. It's just one of those jobs I don't really "like" to do.
I'm with you on that. Wiring is a plain chore. The nuts and bolts stuff is more fun and you can see progress come along better.
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Old 10-10-2016, 10:07 AM   #62
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Re: 1986 Iroc Procharged 408

QWK, yes, it's just a chore. Looks like your ride is coming along nicely! How are you liking the Holley software/ECU?

Here's how I'm running the air filter now. It's a 9" long cone filter from K&N. The piping off the D1SC is 3.5". It 's tight. That's the biggest filter I can fit. It would be nice to get some fresh air to it somehow. Maybe through the old wiper motor hole, LOL.

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Here's a pic of the garage. It's coming along nicely. Can't wait.
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Old 10-10-2016, 12:26 PM   #63
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Re: 1986 Iroc Procharged 408

Man that garage is NICE!!! Details?
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Old 10-14-2016, 10:48 AM   #64
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Re: 1986 Iroc Procharged 408

36 x 24 with a 16 x 8 and 9 x 8 overhead doors. It's actually attached to the old 2 car garage. You can see the old side door still in place. There's a room above it that is going to be accessible from the 2nd story hallway. It'll be a bedroom/playroom for the boys.

So after we move everything out of the old 2 car, i'm going to convert half of it into a laundry room. We have no laundry room now.
I tell ya, car projects don't have anything on house stuff, lol
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Old 01-31-2017, 09:37 AM   #65
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Re: 1986 Iroc Procharged 408

Just a small update. The iroc is on pause, but definitely far from dead.

When we initially started the addition/garage I had to push my car out of the old garage into the driveway and cover it up. The cover held up pretty good. I was getting nervous with all the delivery trucks and weather. So this past weekend my buddy helped me pull it into the new garage. I feel relieved that it's safe inside.

Addition is coming along nicely, I've finished the insulation and have a big drywall delivery coming this Friday. Just me working in the evenings and on the weekend.

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Old 01-31-2017, 07:12 PM   #66
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Re: 1986 Iroc Procharged 408

Glad to see the car moved inside. I got lucky when we bought our new house with no garage. The car stayed at my old house until garage got built.

Was wondering if you had done any work to the car. Im onto wiring now so not much fun but it's progress. Gonna be warm weather before you know it.
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Old 09-13-2017, 07:33 AM   #67
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Re: 1986 Iroc Procharged 408

I'm back! After hanging a ton of drywall, painting, and getting things organized I can finally work in the garage. Phew, the house has really been taking up my time this summer! The boys new room is 98% done, I just need to finish the closets out. We are planting grass and trying to do some landscaping before it gets too cold. Also, the power steering pump on my 4th gen died. So I wanted to fix that and added a separate P.S. cooler instead of the factory inline one that mixed dexcool with the P.S. fluid...
Nothing terribly exciting on the Iroc, just wiring...

Still trying to organize things, I had to put my garage stuff in the basement while I was finishing the garage. The 4th gen is in the foreground.



Current state of things. I was able to run the Holley wire harness where the stock one ran, through the passenger kick panel. Plenty of length. Its the LS1 main harness they offer.



Another shot:


Here's where it's coming through in the car. The 2 main engine connectors are off to the left. The main power connector is front and center, that one runs directly to the battery in the trunk. My plan is to mount the Holley computer behind the dash.



I mounted a Junction box in the old battery tray. Again, I made a simple plate that used stock holes in the tray, then mounted the junction box on that.



On a sidenote, can everyone still see my old pics? I can still see them, but with the photobucket nonsense I wanted to check. I'm using Flickr now, we'll see how it goes.
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Old 09-13-2017, 08:32 AM   #68
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Re: 1986 Iroc Procharged 408

Good to see your back at it. Yes, I can still see pictures. Keep chipping away at it.
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Old 09-20-2017, 09:17 AM   #69
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Re: 1986 Iroc Procharged 408

Continuing with wiring....
Thought I would share what I did for the coolant sensor. The Holley wire harness is set up for a 2 wire sensor, signal and ground. A stock 99-02 Ls1 ECM would then send the info to the dash. The 98 had a 3 wire sensor, signal, ground, and temp gauge. That's what I bought, since my car uses one wire from the coolant temp sensor to the dash. So here's how I modified the Holley harness.
This is the pinout for the 3-wire coolant sensor:


The connector I bought and labeled:


The Holley 2-wire connector, brown wire is the signal, black/white stripe is ground:


Stripped, soldered, and heat shrink. All I have to do is connect the green wire from the connector to the green wire from the factory harness which feeds the temp gauge.



I'll post up more as I go through the various sensors and connections.

Last edited by Thomas Aquinas; 09-20-2017 at 09:26 AM.
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Old 09-20-2017, 12:06 PM   #70
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Re: 1986 Iroc Procharged 408

Did your IAT sensor come with that section? If so, where did you get it? Also, where are you going to mount the coolant sensor, stock or passenger side and tap?
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Old 09-20-2017, 12:54 PM   #71
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Re: 1986 Iroc Procharged 408

Indebt, how's your swap going?

The IAT sensor did not come with it. I bought a Delphi TS10077 off ebay. It has pipe threads, I wanted one that threaded in since I'm running boost. It's actually an IAT sensor for a GMC syclone.

I'm going to mount my CTS in the driver's head. These are AFR heads and that's where the sensor location is. Not sure if that's stock? Hmmm, I'm wondering if the passenger side head has a hole I need to plug, hahaha. Should probably check that out.
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Old 09-20-2017, 01:07 PM   #72
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Re: 1986 Iroc Procharged 408

Both heads are the same (not specific to left or right side). The stock f-body CTS is located on the passenger side but that can interfere with the AC box of a 3rd gen car. Most people, including me, move the CTS to the driver side for easier access and serviceability. The right answer is whatever suits you best.
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Old 09-20-2017, 01:58 PM   #73
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Re: 1986 Iroc Procharged 408

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Indebt, how's your swap going?

The IAT sensor did not come with it. I bought a Delphi TS10077 off ebay. It has pipe threads, I wanted one that threaded in since I'm running boost. It's actually an IAT sensor for a GMC syclone.

I'm going to mount my CTS in the driver's head. These are AFR heads and that's where the sensor location is. Not sure if that's stock? Hmmm, I'm wondering if the passenger side head has a hole I need to plug, hahaha. Should probably check that out.
Cool, I need to buy an IAT and a 98 CTS. On my lq4, stock sensor is on driver but I thought some people move them to passenger for better readings or more true readings, not sure.

My swap is slowly churning haha. I sold my D1SC, and bought an F1A, have my fuel pumps mounted and lines/fittings almost together/ran, intercooler should be mounted this weekend, and the wiring, the dreaded wiring. Honestly,I could probably hook my pinks up and a few others, hook up my fuel lines and start it. It's been a few years since I drove it and I'm over it sometimes. Need more time and money.
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Old 09-20-2017, 09:01 PM   #74
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Re: 1986 Iroc Procharged 408

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P.S. pump; and lines, routed to clear the bracket.
Attachment 320319
Finally making some headway on my build and ran into an issue with the power steering relocation bracket install. The support arm that goes to the block was pushing the pump bracket away from the front of the engine. I had to elongate the hole where it bolts to the block to gain correct alignment for the serpentine belt. Gone unnoticed it would have likely thrown the belt. If you haven't already done so, I'd check the back of the crank pulley alignment with the back of the power steering pulley, just to be sure you don't have the same issue.

Just noticed you have a gap at the step where the bracket meets the block, mine had that prior to the elongation.

Yours is coming together nicely.

Last edited by HP52TA; 09-20-2017 at 10:57 PM.
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Old 09-22-2017, 08:47 AM   #75
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Re: 1986 Iroc Procharged 408

HP52TA - I'll have to double check that. The alignment seemed o.k. to me at the time, but it's worth a 2nd look. Thanks for the heads up.

Indebt- NICE on the F1A, I'm jealous. Have you looked at the new D1SC-X ? They make more power than the D1, but takes less power to turn it. There's a guy on LS1tech that just put up some dyno numbers on an LS3 vette. I'm keeping my eye on the D1x for sure.

Qwk - Yea, heads are the same. I looked at my passenger side and sure enough there's a hole. Good thing I didn't put coolant in yet, or i'd have a big mess. I'm going to put the CTS in the driver's head, since the temp guage wire is over there, a little easier for me. I have the 4 corner coolant thing so hopefully that helps keep the temps even.

It's a 12mm x 1.5 straight thread plug GM# 11610259. In case anyone is curious.
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