Well, all I can say is this setup feels responsive like a stock turbo, but gives the power of a 3076R. At the present that is around 425-430 whp (DJ) on 93 octane with mild mods and a street tune. Hardly useless.

As far as Drifto, he isn't about selling cookie-cutter kits, but more so caters to the specific wants of individuals, like a Z06 with twin GT35Rs. He did his own setup as an experiment, and we had theories on why it may or may not work. As it turned out, it was a home run. I'll never use a regular T3 setup again, ever.

 

To be honest, that's not too far off from what a Green would give you. It's like a much more expensive way to get the same result.

I would love, love, love to use a twin scroll 35r, but there aren't any T3 housings large enough for it. I wanted to go twin scroll, so much so, that I had spec'd out a twin scroll 4088r, with a custom Full Race twin scroll manifold. In the end I've decided to wait until the FP HTA wheel is available to use it with a 3065r.

Believe me, if someone developed larger twin scroll T3 housings, I'd be all over it.

 

It is expensive, but for him it was more a matter of time than money, and for me, it was a matter of making decisions based upon what I learned from the results (and I learned quite a bit).

As for a 35R, a split T3 would be the easiest way to make it feel like a 2.3, and it will make a lot of power. If one is truly concerned that it would be somewhat limiting way up top (which is only conjecture at this point), there is always the split T4 route.

 

I had thought about that as well, the twin scroll T4 route. What would be involved in using a Garrett 35r with a twin scroll T4 housing?

I'm thinking the .95 a/r option would be the best with a 2.0L, do you agree?

 

As far as what would be involved, some custom fabrication and various odds and ends to make the turbo, exhaust, and all the plumbing fit.

A .95 A/R T4 housing for a GT35R? You're thinking much too large IMO.

 

When I had talked with Geoff from Full Race, and he suggested going with a twin scroll 4088r instead of the 3567. He said the best route would be .95 a/r with a 2.0 and 1.06 a/r with a 2.3. There is also the .85 a/r option in T4 trim.

Geoff had also mentioned that when doing a twin scroll setup, larger housings really dont have much of an effect on spool. Does that support what you've seen?

 

Have you guys had any issues with the coatings peeling after a while?

 

Take the smallest T4 housing you can find and compare it to a .82 A/R T3 housing. There is no comparison.

My goal is to make a larger turbo spool like a smaller one, but deliver the power of a larger turbo. That best fits my needs. Where that is concerned, so far, I am successful. I think Geoff may have different goals.

 

i actually had a lengthy talk with Geoff from Full Race today. We talked a lot about their new twin scroll set-ups. A new twin scroll kit is going to be offered from them for the EVO that will own. They totally redesigned their prostreet T3 manifold for the new twinscroll set-up. He cited that the twin scroll set-up actually made more power with smaller diameter primaries. So it's obvious to me, with the reduction in backpressure of the twinscroll design, this set-up will rock. I believe the kit will initially be offered using a GT3076R twin scroll turbo, then up from there.

Twin scroll definatly has its advantages.

CJ

 

Well, your (Ted's) goals are exactly what I want.

I'm thinking a HTA35R with a .85 a/r T4 housing would work really, really well.

The HTA wheel and twin scroll design should help spool and mid range power, while the larger housing allowing all the peak power. Sticking with the 2.0, I'd like to take advantage of the high rpm capability, and dont want to have back pressure issues.

 

Nice, what are they doing about the housing's?

Are they going to be machining them themselves?

 

Again, physically compare the smallest T4 manifold to a large T3, and I doubt anyone would argue that if there are any backpressure issues, they'll be evident on the T3 well before the T4. And keep in mind that where T4 territory is concerned, a 35R is a small turbo. Just things you might want to consider . . .

 

As far as I know, in the T4 twin scroll Garrett housings, .85 a/r is the smallest, and pretty hard to find from what I've heard.

*edit* Oh, they also have a 1.12 a/r twin scroll T3 housing, but I'm not sure that would be any better.

 

Actually, the divided T4 housings can be had in the following ratios:

.58, .70, .84, 1.00, 1.15, 1.32, and 1.59

AFAIK, none of them are hard to get, but I'm uncertain as to fitment compatibility between T series vs. GT series turbos. Anyway, here's a sample of some listings:

http://www.turbocharged.com/catalog/thousing.html#t4

 

There is a T3 flanged 0.82 A/R twin scroll GT35R housing that was released by Garrett in Australia. It is new so there is limited availability but is being used by APS for a subie STI kit so its not vaporware. See it here:
http://forums.nasioc.com/forums/show...1038826&page=6

Its made of hi-temp Ni-resist material too.