GT2871R .86 with an RB25?

[Zetec]

Hey I was wondering if this is too small a turbo for this engine? I'm looking for around 370-400whp and as little lag as possible so this turbo seems like it would be a good fit. Does the RB would flow too much air for the turbo to handle and shorten the life of the turbo or cause it to fail altogether?

[DJButton]

Well technically it's not too small, but yes. A GT3076r in a smallish trim will give you quick spool and hit that 400 range with ease on a good tune with supporting mods obviously.

[Sil240]

Isn't that Turbo a T2 flange or does it come in T3 as well?

I haven't run the comp maps but I would assume that turbo due to the smaller turbine die out up top. But then again you are talking about the bigger housing .86.

I have no idea though.

I would go with that GT3076R as well, I think ATP turbo has that with an internal WG if you wanted also.

[DJButton]

Isn't that Turbo a T2 flange or does it come in T3 as well?

I haven't run the comp maps but I would assume that turbo due to the smaller turbine die out up top. But then again you are talking about the bigger housing .86.

I have no idea though.

I would go with that GT3076R as well, I think ATP turbo has that with an internal WG if you wanted also.

Yep, I've seen them in T3's as well. I still think even with the .86 it will die out, it's a better suited turbo to smaller motor's SR's, CA's, maybe an RB20.

[WhatsADSM]

you ever look into a 3071? Sounds like a good match to me.

[Zetec]

you ever look into a 3071? Sounds like a good match to me.

Ya that turbo is sounding very appealing, I was reading about an srt-4 running one at 22 psi and seeing full boost by 3200rpms.

[nismofly]

3071 will hit that power and work better with the RB, the and the 76's are more for lowish to mid 400s

[lucky7]

well, ill be able to add to this a little bit in a few days. my car is currently at the shop, getting a GT3071R installed (.82 a/r), and tuned. along with some 650's and an AFPR. i have EMS, FMIC, 255lph and Fmic. stock log manifold and internally gated. im hoping for atleast 400, and very streetable.

next on the list, is some traction. these 225's i have now are going to be even more of a handful. lol.

[DJButton]

next on the list, is some traction. these 225's i have now are going to be even more of a handful. lol.

Yeah man, don't listen to the stretch tire nazi's you have 9.5's in the rear right? Throw some 255 on there.

[lucky7]

hell no, i have 8" wheels. hahaha. gonna toss some 245 NT555R DR's on while i save for new wheels.

[DJButton]

hell no, i have 8" wheels. hahaha. gonna toss some 245 NT555R DR's on while i save for new wheels.

Hmm for some reason I thought your wheels were actually a decent size. 555's will work for now then!

[lucky7]

255's be ok on an 8" wheel? im kinda of afraid to baloon them too much.