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mrpav

RB26 turbo choice, downgrade less lag

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Posted (edited)

Hey guys, 

Currently running a Gen 2 3582r .82 on my 33 GTR  

on e85 with all supporting mods. Making around 400awkw but it’s basically dog shit under 4800rpm. 
 

Considering I’m looking at 400awkw Max would a Gen 2 3076 with a 1.06 be more suitable or would it be as laggy and better to go to a 0.82 as well. 
 

Cheers

Edited by mrpav
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Posted (edited)

Yeah open scroll. It seems to be on par with when similar setups are making the power. 
it makes 20 psi at 4800 for reference. 
full 3.5”, standard head, even if it had type b’s thst would only shift the power band in the wrong direction for me. 
 

I am beginning to think the Gen 2 3076 would of been on the money for 400kw and under

Edited by mrpav
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Convert to twin scroll, also I would go GTX3576R Gen 2 over the GTX3076R Gen 2.

FWIW I was running a GTX3576R Gen 2, twin scroll albeit with a 1.01 rear housing and it was all in by 4300rpm~4400rpm with a smaller 2.5L motor at 2bar of boost (29psi).

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Weird ... my old pre gen label gt35 with .82 has 20psi at 4300rpm. 

T3 open scroll. 

 

Have you played with cam gear timing ? 

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GT3582 vs GTX3582 Gen 1 and 2 would be very different in response, considering they flow much more air.

A GT3582R is rated to about 600hp, a GTX3582R Gen 1 to about 750hp and Gen 2 at 850hp. I know the numbers Garrett advertise are a bit over the top, but you get the general theme.

A GTX3071 Gen 2 would hypothetically flow as much as a GT3582 to put things into perspective. 

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