You could do just that. That's what I would do to go twin scroll. Maybe BR or AMS will drop a twin scroll header of there own for a 35r. I know AMS has one for a T4 housing for the 42r. The T3 divided housing will be the hardest thing to score.

 

ATP sells them and they're in stock. You can even buy the 35r from them with the divided housing, and send it to FP to have it upgraded with the HTA wheel and compressor for the same price as it would cost for the HTA new from FP. Then just buy the full race TS T3 manifold. Doesn't seem too dificult to me?

 

That's awesome. I think I'll give them a call. I still won't go TS yet, but having the housing to do it in the future could go a long way. Thanks man.

 

[quote=rr06rs;4794492]ATP sells them and they're in stock. You can even buy the 35r from them with the divided housing, and send it to FP to have it upgraded with the HTA wheel and compressor for the same price as it would cost for the HTA new from FP. Then just buy the full race TS T3 manifold. Doesn't seem too dificult to me?[/quote]


+ 1.... But does anyone have any info on these turbos? I think I would just go with the 35R HTA from FP or Buschur and purchase only the exhaust housing from ATP.

I don't know a lot about ATP, but wasn't there standard 35R housing restrictive?


Also, APS makes a 35R twin scroll turbo kit for the STI's. You could just pick up that turbo instead. See this thread, as this STI had a custom 1.06 twin scroll exhaust housing from APS & it seemed to work really well. Full boost before 4000rpms

http://forums.nasioc.com/forums/showthread.php?t=1341925&page=3

They also have a .82 twin scroll exhaust housing.

http://www.airpowersystems.com/wrx/aps_turbo/twin_scroll/turbo.htm

 

This isn't the bolt on evo 35r. They carry regular garrett GT3582R's with any style hotside you choose. I have dealt with ATP many times from my VW days and they aren't as bad as everyone says they are.

 

Great info rr06rs!

 

If I recall the only Garrett T3, twin scroll housing you could use, would be the 1.06 a/r T3 with T4 flange (which you wont get) or the .78 a/r T3 housing used on the 3076 and 3071 kits.

It would work, but it's too small for a 35r.

There is a reason Full Race had to go with Turbonetics to get a twin scroll 35r. If it were possible to do it the way your thinking they would have done it. Please read the thread I linked in post #13.

It might be hard to understand, but, you cannot make a twin scroll T3 35r using Garrett housings, without sacrificing a lot of performance. The only way to make it work is use a housing that you cant get.

 

Subscribed. I'm working on a build list for a hillclimb car and I'm curious to see if someone tries to make this work.

Thanks,

Dave

 

I'm not so sure. I've driven a 3076R with the .78 A/R TS T3, and also a 1.06 A/R TS T3 with T3 (not T4) flange, and there is a substantial difference. While no one here has yet gone this route with a GT35R, I wouldn't necessarily think a 1.06 A/R TS is too small. Actually, I'm thinking it just might be a very good combination.

 

Why is .78 too small for a GT35R? Have you used this housing before? Do you have evidence that this is in fact too small? I've used a .48 housing on a turbo flowing almost 60lbs of are and had no problems at all. Made full boost on a 1.8ltr at about 4000rpm and never choked up top one bit. Everyone likes to say things don't work just by word of mouth and rumors. Unless you have tried this IN REAL WORLD ENVIRONMENTS, I don't think opinions count for anything.

 

Exactly! Thank you. I think I found my next route after I pummel this greeen.

 

A .78 A/R in twinscroll is obviosly a much different animal than a regular open scroll housing of the same A/R. A .78 A/R TS housing will limit the top end power of a 35R, but will spool it faster and improve midrange transient response.

 

There is a couple of options you have in the US and they are called the GT3782R's . They use the large frame Garrett GT ball bearing centre section and a larger diametre than GT35R turbine but in a smaller trim size .
They are called the Cummins diesel upgrade turbos and you even get a couple of compressor options . The stage 1 uses an 82mm 50 trim version of the 7/14 blade compressor wheel in the GT4088R - C117 series wheels . Stage 2 uses the same 6/12 blade compressor as the GT3582R . Stage 3 uses the same wheel as the GT4088R and is called a GT3788R .
All three of these turbos use large GT40 style TS turbine housings though not in high temp resistat matereial . I'd be very curious to know if the material spec of Turbonetics turbines and turbine housings is just the same as garden variety Garrett truck diesel stuff .

There would be a few ways to get the GT3582R's compressor in a large frame TS turbo , the GT3782R Stage 2 is at least an off the shelf one and in the larger BB centre sectrion . The GT40 T4 flanged TS turbine housings were in I think 0.94/1.05/1.17 A/R .

Cheers A .

 

I said the .78 a/r housing would be too small for a 35r.

The 1.06 a/r housing would work, probly very well at that. Which is why Full Race originally went that route until availability became an issue.

I think Full Race did all that already..

If the .78 a/r worked with the 35r wouldnt they have gone that route instead of going with a Turbonetics T4 option?

Did you bother to read the thread I posted earlier in this thread? It explains why it wont work.

The twin scroll HTA 35r was discussed before, I had thought it would be a great idea, but there isn't a turbine housing that Garrett offers that is big enough, or that you can even get.

If you dont want to believe me, or Ted, or Geoff from Full Race, then by all means go ahead and stick a .78 a/r TS housing on a 35r.

Just dont complain when it doesn't perform very well..

 

Frenchy do you know how a .78 A/R 30R performs?

Walker had one on his car for a while, it definately performed better than a single scroll .63 or .82 A/R.

Scorke