i have a gsr with built bottom end and itr cams and plan on buying a peakboost kit asap jus fighting with what turbo to use? i kno the gt2871r spools quick and wud be in my hp range cuz im looking for around 300-350 whp but i want the turbo to keep pulling through the powerband. i wanna have a usauble powerband tho obviously. and am curious to see when poeple hit full boost with a GT3071R on a GSR but also other blocks to??? im looking for 10 psi for right now and will rev to 8,000 maybe a little more..... Also thinking if i got a smaller ar that wud help the spool too cuz alot of them have like .86 ar ??? tell me what u guys think. i wud greatly appreciate it

 

I run the GT3076R .82 (84mm gsr, portflow head w/ itr cams) with a full race kit. Full boost at 5200rpm. It is a great turbo if you want 500+whp but still have quick spool for the street. I like how cruising on the interstate you can boost in 5th gear pretty easy. No need to downshift into the 5k+ powerband. For a medium sized turbo I think you will be happy with the performance. The 71R is going to be about 200-300rpm quicker spool but will make probably just short of 500 which is still overkill for the street. Good luck with everything. Oh and I made about 350whp @ 10psi.

 

thanks for the help and thats with a bigger ar i was thinkin about getting so i cud probly get spool even quicker yet who knos. and ya im looking for about that with 10 psi mayb even alil less but still thats plenty for a dd. it jus seems like a hard choice between the 2871 and the 3071

 

i'd do the 30r

 

I'm running the precision 3076r on my fully built 83mm gsr...the turbo spools really fast even though I'm running the biggest exhaust housing available...1.06ar I believe. I'm only running about 8psi and making about 340whp. I'm waiting for a 44mm wastegate now because the 35mm I have on there isn't cutting it and i'm having boost creep issues. After I get the wastegate I'm hoping for over 400whp on pump and over 500 on C16.

 

around when do you hit full boost?

 

Iwould like to know also.

 

mstolars when do u hit full boost? more opinions and stats wud be great

 

Well, I just drove the car and i'm not really sure when I hit full boost...don't really pay much attention to it. It's roughly around 5000rpm....I'd have to do a log with my ems to really check for sure. I used to have a t3/t04e turbo on my old setup and they feel pretty similar when spooling except now I have 50 more Hp at almost half the boost pressure.

 

opinions??? anyone

 

bump

 

I love the GT3071R, even in a .86A/R T2 setup. It has the midrange I'm looking for without having to worry about a lot of need for topend. I didn't even have to change from my old Greddy manifold on my oldsetup. It's a blast to drive in my 10.0:1 static compression