Turbo for 400-450 rwhp?????

[al_v]

I have a s1 rb25det with greddy intake and FMIC , now I need a turbo thinking in 400-450 rwhp , what would be the best choice between garrett GT3082R and GT3582R.And what about the turbine A/R .63 OR .82??????? I don´t want to much lag.....

[minivan_don]

define laggy ?? when do you want the real power to hit ??

also, this comes up every week ... have you done much research ?

[al_v]

define laggy ?? when do you want the real power to hit ??

also, this comes up every week ... have you done much research ?

For me laggy means more than 3800-4000 rpm to get full boost.I did a search but nothing about the GT3082R.

[Carl H]

gah gt3075r and done.

[knightrider4]

you would really be happy with the 30r. With the Garrett Ballbearing turbos you are looking at good transient power response and linear power band. 30r is perfect for 400-450 on pump Gas.

[al_v]

you would really be happy with the 30r. With the Garrett Ballbearing turbos you are looking at good transient power response and linear power band. 30r is perfect for 400-450 on pump Gas.

Yeap , I will go with the gt3082r. Anyway I would like to know how much lag have the gt35 in the rb25 engine????

[pito2003ac]

^^^ i was wondering the same thing

[knightrider4]

I will let you know how much lag there is with the 35r soon It also depends on if you have the money to do a twin scrol setup. Then you could do a nice T4 35r set up. with the twin scroll setup i would expect you to see full boost anywhere from 3900-4300 depending on your turbine A/R housing. single scroll figure a few hundred RPM's more. Again i can't stress this enough with a ball bearing turbo your transient response will make it feel like it spools earlier, harder, and more linear. ball bearing-non ballbearing are different ball games

[DrifterProdigy85]

Ive heard the GT35R hitting around 15+psi around 3800rpm on the RB25. I think thats decent since the RB seems to hit hard around 4krpm anyways.

[Tripz]

I've got the GT35R on my RB25 yesterday, I'll let you know how fast it spools when I get it tuned at the end of this month. Compressor .70 with a .58 A/R.

[Carl H]

putting a twin scroll housing on my 30r on my 20 made it spool a hair bit later but once it did transient throttle response is insane and when it hits it hits like some one whacked you from behind.

[DrifterProdigy85]

Twin Scroll seems to be the way to go now. Spool is nearly the same but gives a good bump in torque everywhere in the powerband making "lag" nothing to worry about.