I have decided to pull the plug and start a turbo build on my 04 LS1. I am trying to utilize some parts that I already have but needed some advice. My knowledge on FI is moderate so I apologize in advance if anything I say is not accurate. Back story is.... had a ram srt TT running 2 Precision Turbo - SC61 a/r 70 81exit (dont know if this link will get taken down...) http://www.nolimitmotorsport.com/prod/400-1475 I got rid of the truck but kept the turbo parts.

I want to do a rear mount single turbo on my vette now and would like to use one of these turbos. the plan is taking headers to Y pipe in the tunnel then the return pipe from the turbo run next to the exhaust in the tunnel. I had a guy that told me this turbo would be too small and need to go bigger. The question is can I use this turbo at all or will it be working too hard as a single? I am trying to create a fast daily driver not a BA drag car that I need that extra .1 off my time. The other side of this would be use both turbos but can I run these sequential or have a y pipe on the return piping. any way I do this I only want to have 2 pipes in the center 1 exhaust 1 going to intercooler.

 

I assume you have a stock ls1. I still would not run one of those as a single. Take a look at how the STS twin kit is set up. If you are doing a rear mount save yourself the money on headers and keep your factory manifolds.

 

Sell what you have that does not fit the build to fund what does.....and by the correct turbo.
Search "RMSman"........he had a nice rear mount that made some steam and was driven weekly.

Good luck with your build.

Here ya go...........http://forums.corvetteforum.com/c5-f...the-1-4-a.html

Missed the boat.........but here is some good info........http://forums.corvetteforum.com/c5-p...turbo-kit.html

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heres how lmr ran all 4 pipes (2 exhaust, two charge) to the rear

 

Dang why would you send me that now i wont sleep tonight cause ill be thinking about how nice it would have been to get something already setup. You said it doesn't fit the build and this is what i have been told already but help me understand what about the turbo is making it not applicable? And why would i not be able to use both? I am not looking for more than 500-550 because i do not want to start rebuilding my engine and drivetn. I will be running low psi, less than 6. I plan on selling my LT xpipe catback and using stock manifold so like suggested to offset price. Given that what should i look for to meet this criteria? I think a t76 would be more than i would need and at that low of boost... i came to learn so i am just clearifing what i have been told in the past

 

If I were doing a rear mount on a stock car I would put a Precision 6765 on it, upgrade your valvesprings, and take it to a reputable tuner. It will be a 500hp big-fat-tq having monster.

 

This has been my plan b since the begining of the project maybe not that turbo but just wanted to try and salvage what i had first

 

See youre in Tampa too. I have a STS rearmount setup if you want to check it out. Also, highly recomend you get with Joe at Powertech in St Pete - a wealth of knowledge on rearmounts!

 

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Pm me some info so I can check it out. I have had a few people tell me to talk to him. The prob with talking to shops is everyone wants to sell me a new turbo no one wants to give out free knowledge....

 

My car is getting tuned right now after having a single turbo kit installed on it.

I love the kit because a massive single rear turbo simply sounds amazing. It sounds like a jet engine in the most literal sense.

My kit is set-up like how you're describing. The headers are Y'd together to a single exhaust pipe, and then the charge pipe goes where the other exhaust pipe would normally go, up to an intercooler into the engine. The pipe to the intercooler runs through where the battery is normally mounted, and then the battery is relocated to the rear (easy to do).

The guy I bought my kit from said it originally had larger pipes (3" both ways I think), and they ended up switching it to smaller exhaust and intake piping (2.5" I believe), because they found it built up boost better than way. So I wouldn't fret over trying to cram the biggest pipe(s) you can. Turbo set-ups are fickle, bigger isn't always better and it takes a lot of experimenting to find out what works best.

Mine has a single Garret 4088 turbo. Their website says its good up to 725hp, so we'll see what it puts down when I get to a dyno.

 

Thanks for the info. What size is the turbo you are using. A/R?

 

Its a Garret 4088 turbo.

Turbo Comparison Sheet
Turbo Compressor Turbine
Turbo PN CHRA PN Ind Whl Dia(mm) Exd Whl Dia(mm) Trim A/R Whl Dia(mm) Trim A/R
751470-1 741450-9 63.50 88.00 52 0.72 77.00 78 0.85
751470-2 741450-9 63.50 88.00 52 0.72 77.00 78 0.95
751470-3 741450-9 63.50 88.00 52 0.72 77.00 78 1.06
751470-4 741450-9 63.50 88.00 52 0.72 77.00 78 1.19

Not sure which turbine wheel it has on it to be honest.

 

Awesome setup idea, when will it be done?

 

I built a single rear C5 a few years ago. Here's my old build thread on that car. Hope it's helpful. Good luck with the project!

http://forums.corvetteforum.com/c5-f...s-results.html

 

thanks for the info! I found a guy today that wants to jump on board and wants to do a twin setup and has some ideas about the piping so i will start the pictures soon!!!

 

reviving this thread for an update.... I spoke with precision and they recommended I go with a single turbo at 6-8psi make the most of my turbo. two is too much and would never be able to get where I want boost wise. So I will be running a single SC61 ar 70 81 exhaust rear mount with a 60+mm wastegate and a 50mm BOV. any recommendations because the rep stated that I would run into issues at my top end because the turbo is small. quick spool torque tire eater, but back pressure in the end of my power range.