Which one would be better on the gt35r? 3" or 2.5" exhaust outlet.
My guess would be that the 3" would get higher HP and the 2" would spool faster.
Or doses it it really matter.

 

Smaller would not make it spool faster per-say... The less restriction you have coming off the hotside of the turbo the better. You would be stupid to spend all that money on a 35R and then run a 2.5" exhaust. I would run at minimum 3" off the turbo to the back of the car.

 

I know they make the 3" and the 2.5" hot side on the gt35r. I was wondering what would be the advantage of the two? I agree Running a 2.5 inch exhaust would be a waste.
I just bought SBR turbo system and they come with the 2.5" hotside. If I knew they only have that size I would of bought BR system. Wait, Does BR system even come in 3"?

 

The advantage between the two is quite simple.

2.5" - More restrictive
3" - Less restrictive

With turbo applications you want it less restrictive off the hotside (exhaust).
The less restrictive it is the faster the hot exhaust gases get OUT and the better the turbo will produce power more better.

Regarding the Buschur kit. I "beleave" there kit comes with a 3" o2 housing off the 35R hotside that bolts to the BR downpipe.

 

I should of bought the BR kit.

 

I believe , I hope you dont beleave anything... that everybody except maybe Full-Race uses the 2.5 inch outlet, people have run 9's with that housing.

Scorke

 

Thanks everyone. Scorke, you made me feel better about my purchase. Hopefully one day I will make it into the 9's.

 

Np man.

I am in the process of finishing up my 35R project, everybody that makes kits for our cars uses the 2.5 inch outlet because of the proimity of it to the AC, the 2.5 outet makes the dp clearing much easier.

AMS/Buschur et al all use the 2.5 inch outlet the difference in power potential I do not think is TOOOOOO great, but I am sure its there. 5-600 whp will not trouble the smaller one any though.

Scorke

 

i never seen a 35r with the 3" comp outlet. any pics? btw i have the regular 2.5" 35r.