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3.1L Turbo Build

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Old 01-18-2014, 12:05 PM
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3.1L Turbo Build

Ok, well i have been on here for a while and have done lots of research and its time to start posting. I am in the beging steps of turbocharging my 3.1L, auto trans, 1992 Camaro. Its not going to be for racing just a project, fun car, learning experience. Motor and car is in good shape, I bought it when i was 16 and can't part with it. I will try to build as fast as i can and post pictures as often as possible. But with work, kids, and hunting it might be a slow one.
What i have so far is t3/t4 .64/.50ar ebay turbo, inter cooler, 260 delta cam and lifters. I have ported and polished the heads and intake. I have all the tuning software i need, moates and tuner pro, not new to tuning. I have been following fasteddie, project89 turbo builds and taking what i can from them. Thank you! My next step is getting my headers fabbed up and getting waste gate, bov, and I think 28lb injectors.
What is the best set up for a single turbo, log style and mid-length on drivers under k-member style or something else?
What are some ebay BOV and Waste-gate recommendations?
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Old 01-18-2014, 02:16 PM
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Re: 3.1L Turbo Build

Awsome. Always cool seeing someone build up a 3.1L and using the stock ecm.

As for the exhaust either use a log on the passenger side and a full length on the driver side with a crossover on the back side(firewall) of the headers or just make up real tube headers for both sides with a crossover pipe in the front of the engine. They would be forward facing ones that tie into the turbo which youll want where your charcoal canister was/is. Stay away from any set up that is under the k-member. I did it but to be honest it was a horrid set up mainly for ground clearance.

I liked the log style ones for what its worth. I feel as if that sort of set up is more then capable of making your set up run quite well. Its all about how much time you want to put into the headers and exhaust.

As for the BOV. I recommend a "type Rlf" bov. I finally got one for this winters tear down. I used a different one before and didnt like it as I know it leaked. The Rfl cost about 35 bucks iirc.

As for the waste-gate look for either a 38mm full size(not a mini gate) or get a 44mm mini gate. Either way is up to you as they usually cost around 80 bucks off ebay and the 38mm unit I had before worked great. Im just going with a mini 44mm gate because of the full tube headers I am building and the restraint on space in the engine bay.

Look for a gate that has a spring for less then 10psi. You can always up the spring later but most springs off ebay are lower then they say. You just want a spring that can keep your boost to 6-8psi so you can tune it and not worry as much about blowing it up while tuning it. Obviously you'll have to ease into the throttle a little more and more as you go along but from what i remember when I had a t3/4 like you have....is that it spools up at very low rpms/low boost threshold.

Since your tuning the car yourself what mask were you looking at using. I would recommend $59 just because it works well with boost and a 7730 ecm with only 1 different pin out iirc. The tcc was the only pin that needed changed. You also can use a ac delco sileniod boost controller with that mask and it controls boost great.
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Old 01-18-2014, 02:44 PM
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Re: 3.1L Turbo Build

Ok I will look into forward facing headers. I am trying to get a list down for what I need to purchase so i can fab them up. How is heat from that style? I have some header flanges on the way. just need to get some tubing and bends. As far as ecm goes and tuning that is exactly what I plan on doing. With the 260 delta cam did you replace your valve springs? Delta told me stock will be fine.
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Old 01-18-2014, 04:14 PM
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Re: 3.1L Turbo Build

Delta told me the same thing as for valve springs but if you can afford the extra 100 bucks or so then look to get #980-12 comp cam springs. I had the 981-12's and they had some high pressure but i was looking at upgrading to a 272 grind cam so i wanted to make sure they could handle the lift.

I was running into issues with valve float with new stock replacements so that's why i would recommend that you start out with good solid springs. Its not to hard to float the valves with 12psi and when your turning 5500+rpm.

The springs 980's:
http://www.summitracing.com/parts/cc...Fa9aMgodZEoA7w

Matching retainers that you will need:
http://www.summitracing.com/parts/cca-742-12/overview/


The heat is good and manageable from either the log or the full tube forward facing headers. Just wrap them good with some heat wrap. Ive always gotten my wrap off ebay for pretty cheep and its held up well. Also if you can spend another 40 bucks or so get a blanket for the turbo as every little bit helps keep the heat where its suppose to be.

Here's a blanket but there are so many out there its just up to what you want to get and spend.

http://www.ebay.com/itm/T3-T4-TURBO-BLANKET-Turbo-Heat-Shield-BLACK-/220982223178?pt=Motors_Car_Truck_Parts_Accessories&hash=item337391214a&vxp=mtr

If you ever need a rough bin file for your first start up when you get to that point let me know. Obviously every set up is different but I have so many bin files that it would give you a better base tune then one off code59.
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Old 01-18-2014, 05:25 PM
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Re: 3.1L Turbo Build

Sweet, looking forward to seeing another V6 turbo on the forums! Definitely following your build, I'm in the process of a turbo build as well, but I went the easy way and bought a setup mostly fabbed up already. I went with Megasquirt, but you sound like your already into tuning with another route. Can't wait to see your progress

Although depending on how you are setting yours up, you may want to go bigger than 28lb injectors. Mines a stock 2.8, and it was recommended that I go with 36lbs or higher, I went for the 36s. You'll probably make more power than me so just a suggestion.

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Old 01-18-2014, 10:14 PM
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Re: 3.1L Turbo Build

Your ride, good sir.
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Old 01-19-2014, 01:16 AM
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Re: 3.1L Turbo Build

for something that wont be raced a log style header will be easier to build , and will still make killer power

38mm gate and rfl bov is always my recomendation

do u have a picture of the turbo u got ? if its not to late to send it back or sell it i would pick up a ebay gt3582 as its a much better turbo , it needs less boost to make good power
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Old 01-19-2014, 09:20 AM
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Re: 3.1L Turbo Build

Originally Posted by mccl6927 View Post
Your ride, good sir.
I'm not one for white paint, but that looks goood, very clean.
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Old 01-19-2014, 11:28 AM
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Re: 3.1L Turbo Build

Thanks willexolx, clear coat is peeling so i need to repaint it this summer.

I think I'm just going to go ahead and do the forward facing headers with crossover up front. It doesn't seem to difficult to do. Just need to figure some bends out.

The turbo was a gift from my brother, we will just use that one for now and see what we can do with it. I did just purchase rfl BOV, 38mm Wastegate, and flanges, so i can cross those off the list.

As far as injectors, I don't want to go to big and run into idle problems. Where is a good place to purchase? Southbay? Or is there some vehicles I could search for in the junkyard to pull from?
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Old 01-19-2014, 02:14 PM
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Re: 3.1L Turbo Build

I've had up to 42 lbs/hr injectors in my 2.8L I6 (Nissan) and had no idle issues, once everything was dialed in, most notably, injector voltage offsets.
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Old 01-19-2014, 04:23 PM
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Re: 3.1L Turbo Build

That turbo will be fine. I went 13.30s with that same turbo. Its a small turbo but will work good just dont turn the boost up past 13 psi because it really doesn't do much after that. It just blows hot air with really high boost and is inefficient. But with all that aside. I went 13.50s in the 1/4 mile with the turbo u have with 12 psi, stock trans, a ell cheepo tq convertet, stock open rear end. So you can have some fun with that turbo.

The gt3582 is better but its ur first turbo so u could upgrade later if you want to. I have 48lbs injectors and dont have any issues with idle. I did have issues a while back but that was more from me not listing to others as my injector offsets were killing me. I maxed out 28lbs injectors with about 13psi of boost from that same turbo u have now. So you may want up up the fuel flow. Definitly contact southbay. Great vendor. Look to spend 150 bucks or so for a set of 6 from them.

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Old 01-24-2014, 05:06 PM
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Re: 3.1L Turbo Build

I was searching for some bends for headers to build and found this site. http://www.acestainless.com/butt-wel...-40-mild-steel
what do you guys think about mild steel schedule 40 1-1/4" for the headers?
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Old 01-24-2014, 05:16 PM
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Re: 3.1L Turbo Build

Originally Posted by tonymcc3 View Post
I was searching for some bends for headers to build and found this site. http://www.acestainless.com/butt-wel...-40-mild-steel
what do you guys think about mild steel schedule 40 1-1/4" for the headers?
u dont need to build them that heavy duty , unless ur going to hang a 50 pound turbo off them

just get this kit
http://www.mandrel-bends.com/catalog...te-bk-872.html

and 2 of these
http://www.mandrel-bends.com/catalog...teel-2248.html

though i belilve summit has thos ecollectors for 35 bucks for the pair
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Old 01-24-2014, 05:18 PM
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Re: 3.1L Turbo Build

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Old 01-24-2014, 05:47 PM
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Re: 3.1L Turbo Build

Yeah that will definitely be lighter. Thanks for the links no need to over do on my first set up.
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Old 01-24-2014, 05:51 PM
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Re: 3.1L Turbo Build

Originally Posted by tonymcc3 View Post
Yeah that will definitely be lighter. Thanks for the links no need to over do on my first set up.

u can build them out of the weld els no big deal they will last forever

the tubing i linked will last a bunch of years though , just not forever

u want 1.5 inch od tubing nothing smaller , the 1.65 would work as well but clearance would be tight around the bolt holes
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Old 01-24-2014, 07:04 PM
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Re: 3.1L Turbo Build

Look up kits on summit also. I got a sbc header kit that has tons of 1 1/2 pipe and bends for 80 bucks. The collectors cost 40 bucks from summit and u can either make the flanges yourself or go to wot tech or brittishcarconversions for some 50 dollar laser cut header flanges. I opted for the laser cut ones but I'm working with d port heads.
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Old 01-30-2014, 06:47 PM
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Re: 3.1L Turbo Build

Well I'm still waiting on my header flanges to get here. Other than that i have a everything i need to start this build. Injectors, wide band O2, oil lines and fittings are still the main things i need.
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Old 01-30-2014, 06:50 PM
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Re: 3.1L Turbo Build

Originally Posted by tonymcc3 View Post
Well I'm still waiting on my header flanges to get here. Other than that i have a everything i need to start this build. Injectors, wide band O2, oil lines and fittings are still the main things i need.
looking real good man , look in my build ur own turbo header thread , and also pilsburys t43/t4 turbo build thread , i built his headers too for some really nice header ideas

on his car we kept the ac , if u dont have ac or can make it clear the ac the headers in my thread are a better design , but both designs work very very well
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Old 01-31-2014, 05:55 AM
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Re: 3.1L Turbo Build

Looking good. Im excited to see your build come together
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Old 01-31-2014, 08:57 AM
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Awesome, looking good!
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Old 02-03-2014, 07:00 PM
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Re: 3.1L Turbo Build

I had some time yesterday to get the intercooler mounted. I took the supplied brackets that came with the intercooler cut them up and welded them the way i wanted them to be. Also bored out the slots so it is adjustable. Today the header flanges came in from westcoastfiero, they seem to fit well and look good.
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Old 02-03-2014, 07:53 PM
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Re: 3.1L Turbo Build

Nice. I actually cut out that support when I ran a ic. It worked out well. I had mine on a angle like that but closer to the rad so that the fan could pull air though at low speeds.

Thoes flanges look much better then the ones I put totlgether a few months ago...
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Old 02-09-2014, 04:11 PM
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Re: 3.1L Turbo Build

I got the passenger header almost done today. Here are some pictures.
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Old 02-09-2014, 04:12 PM
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Re: 3.1L Turbo Build

One more!
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Old 02-09-2014, 08:08 PM
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Re: 3.1L Turbo Build

Turbo mounted!
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Old 02-10-2014, 05:03 AM
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Re: 3.1L Turbo Build

Looking good!
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Old 02-10-2014, 05:06 AM
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Re: 3.1L Turbo Build

looking very nice
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Old 02-10-2014, 06:55 PM
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Re: 3.1L Turbo Build

Thanks guys.

How close do I want to put the waste gate to the turbo? And It needs to be after the two headers merge right?
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Old 02-10-2014, 07:01 PM
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Re: 3.1L Turbo Build

u can put it to the front like in the pic , or u can go stright up and down in the same location behind the turbo flange

make the merge first and i can give u a much better idea
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Old 02-22-2014, 08:02 PM
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Re: 3.1L Turbo Build

Started the drivers side today. Here are a few pictures.

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Old 02-23-2014, 06:40 AM
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Re: 3.1L Turbo Build

Nice
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Old 02-23-2014, 09:18 AM
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Re: 3.1L Turbo Build

Are you guys coating the headers with anything before you put on the exhaust wrap?
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Old 02-23-2014, 11:11 AM
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Re: 3.1L Turbo Build

I've used some high temp primer. VHt stuff. Then wrap it and use some of the silicon spray they sell to keep the fiberglass from shedding off so bad.
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Old 04-05-2014, 07:30 PM
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Re: 3.1L Turbo Build

A little up date after a month. I had a good day to work on the car today, this is where I'm at.


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Old 04-05-2014, 09:05 PM
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Re: 3.1L Turbo Build

Looking nice man
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Old 04-06-2014, 11:53 AM
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Re: 3.1L Turbo Build

Im needing a little help with getting the right parts and fittings for my oil lines. I will take the oil pan off to weld a bung for the drain tube. Any suggestions on where to get some decent lines and fittings?
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Old 04-06-2014, 01:45 PM
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Re: 3.1L Turbo Build

I just got them from a vendor on ebay. 4an hose and fittings for the feed. 10an for the return using a 1/2 inch npt bung at th oil pan.
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Old 04-28-2014, 10:53 PM
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Re: 3.1L Turbo Build

Down pipe done. Just need to clean up my welds and paint and wrap everything. Still need to get a few things to get it running but almost there.


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Old 04-28-2014, 11:19 PM
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Re: 3.1L Turbo Build

looking real good man , dont drive it till u get a wideband and a tune though
that turbo wont really wake up till around 13 psi of boost @ sealevel so depending on ur altitude dont expect to much out of it till the boost gets turned up
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Old 04-29-2014, 04:59 AM
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Re: 3.1L Turbo Build

looks nice. Ill have to take a pic of mine and show it because it looks almost the same as yours except you have more flexible couplings. I even have the black wastegate.
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Old 04-29-2014, 06:49 AM
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Re: 3.1L Turbo Build

the only thing i would change on the whole setup is the downpipe , going to a 3inch downpipe will make a huge difference.
edit
id also change out that tight radius bend on the charge pipe infront of the throttle body for a sweeping bend

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Old 04-29-2014, 10:52 AM
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Re: 3.1L Turbo Build

Yes do get a wide sweeping bend for the intake.
I have been buying individual parts from frozenboost dot com. My diesel sees up to 20psi and 5 to 10 psi of boost sustained for hours no problems with their stuff at all.

I coated my turbine housings and turbo manifold with jethot ceramic coating. Its been on there for almost 2 years now and is doing great. I sand blast all the surfaces first with iron slag so the jet hot sticks to the surfaces to be treated like chewing gum to a cat.

I cant see the pics real well, if you can hook coolant up to the turbo you should do so (if you have coolant passages)
Also run an oil restrictor to the turbo to keep your oil pressure to the engine up. I have ran as small as a 0.030 inch restrictor on a decent sized holset he351ve for over a year. Eventually I widened the restrictor out to 0.050 inches and put a filter in line with the turbo chargers to keep foreign material from clogging the orifice.

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Old 08-29-2014, 10:04 AM
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Re: 3.1L Turbo Build

I know it's been a while. I have had a busy summer. I will get back on this project here real soon.
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Old 08-29-2014, 11:58 AM
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Re: 3.1L Turbo Build

Cool. We all look forward to our updates.
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Old 08-29-2014, 01:37 PM
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Originally Posted by fasteddi View Post
Cool. We all look forward to our updates.
+1 looking forward to hearing more
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Old 12-15-2014, 05:13 PM
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Re: 3.1L Turbo Build

Hey Guys, Does it matter what kind of muffler you run with a turbo setup? About to have some free time again. I have done a little work to it i need to post some photos. It will be running in a few months, don't give up on me.
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Old 12-15-2014, 05:27 PM
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Re: 3.1L Turbo Build

Something free-flowing is best. Stay away from Flowmaster, they tend to not work well with turbo applications.

I use a Moroso Spiro-Flow muffler on my turbo car.
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Old 12-15-2014, 05:49 PM
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Originally Posted by Six_Shooter View Post
Something free-flowing is best. Stay away from Flowmaster, they tend to not work well with turbo applications.

I use a Moroso Spiro-Flow muffler on my turbo car.
My Thrush Welded muffler also works well with the turbo. Its chambered with no packing.

Good to see you back at it.
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Old 03-29-2015, 01:16 PM
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Re: 3.1L Turbo Build

A little update, I ended up pulling the motor and rebuilding it. New bearings, rings, seals. So its complete and ready to drop in. I have purchased a few items to get this project running and driving. Just a few more weekends and I should be able to start tuning. I did end up getting a T5 for cheap with everything needed for a swap so instead of rebuilding my auto for $1300, thats what i have been quoted around here. Ill be swapping the 5 speed in. If i don't like it then I will attempt to rebuild the auto my self and put it back in or find a t56. So I'm getting closer. Here are a few Pictures.




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