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gt3040r or gt3540r...?

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Old 01-07-06, 10:46 PM
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gt3040r or gt3540r...?

well found a place for the t3 manifold..... now looking for a fast spooling single, the person who wants this setup wants instant responce, and looking for around 375 whp max. i know the rx6 is the fastest spooling single, but i sold mine by the time he was looking for one. i told him maybe the gt3040r with a 1.06 a/r will be a close setup to an rx6 since it has a smaller exhaust side. i have seen some dyno sheets with the gt3540r and a .84 exhaust side, and it falls off too hard after 7k rpms. my rx6 didnt fall of that bad, it had a smaller turbine wheel and housing but was a 1.06 a/r. just looking to get some imput...
Old 01-07-06, 10:59 PM
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dude
tell him to get the GT35R with the .84a/r
driving my buds car around it was almost impossible to keep it outta boost and whenever you want boost its full boost in a instant
and this thing wills till make the power and will make 390rwhp easy on street tune 12-14psi
Old 01-07-06, 11:33 PM
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Isn't the GT3040R about the same size as the RX6, wheel-wise?
Old 01-09-06, 08:32 PM
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anyone with some more info on this topic???
Old 01-15-06, 09:29 PM
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You can find all kinds of info on the 3540r, just do a search. The spool is nuts. I was in GuitarJunkie's car and he was in third... he tapped on the throttle and I was INSTANTLY thrown back... it's like there wasn't a single bit of lag at all.... pretty nice power.
Old 01-17-06, 02:50 PM
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If it was me, GT35R all the way. It will be very responsive and get to your goal on pump gas, actually it will be higher than your goal. I run the 3040R on my jdm 2.0 sti motor (wrx) and even though it is suited for a high revving engine I think you will be happier with the 35R. The 3040R uses a 35R compressor side with a 30R hotside. On pump I am seeing 400whp and race gas around 475whp. IMO the 35R is just better suited on your car.
Old 01-17-06, 07:38 PM
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Your friend could also just use a fully divided T4 manifold and use one of the GT35R T4 setups from A-spec. They do sell a smaller .82 hotside and that would spool faster than you could imagine. Just a thought.

Zach
Old 01-17-06, 08:51 PM
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i would have thought the t3 would spool fastest. boostedrex do you have a dyno sheet of a gt35r t4 with an .82? i seen a sheet of a 35r t3 with an .84, seemed pretty impressive. it had 200 lbs of tq. by 3500 rpm.
Old 01-18-06, 05:16 PM
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No, there is a dyno sheet floating around in this forum of a GT35RT4 with a 1.00 A/R hotside though. Even with a damaged turbine wheel he was seeing 16psi by about 3700rpm if I remember correctly. The car belongs to Broekn09 on this forum. You might want to check out the A-Spec tuning sub forum for more info. Sean is great about answering questions. And I know he has some more dyno sheets for this turbo that should be posted up soon.

Zach
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