N1 Turbo's Rev Range R32 Gtr

[aDrew_C]

This topic has gotten a bit out of hand, but if everyone wants to argue twin vs single, might I add the weight issue. Twins may mean smaller turbos but two small turbos still generally weigh more than one bigger one. Then there's the extra intake piping and exhaust dump/front pipes. IMO twin turbo only has three obvious advantages: 1, supposed efficiency gains - not so true these days. 2, if the turbos are setup sequentially - again, how many sequential tt cars have been made after the early 90's? and 3, cheaper upgrade path (for already tt cars) as well as keeping the standard look.

So really the only reasons to go with twins on a GTR is either for regulation reasons with motorsport, cost, or to keep your from being defected.

[R31Nismoid]

Not really sure what weight and piping have to do with response/spool/performance...

[Swiper the Fox]

So really the only reasons to go with twins on a GTR is either for regulation reasons with motorsport, cost, or to keep your from being defected.

or to make over 500AWKW and run faster at the strip than all but one of all the street registered GTR's in Australia.

Mark, Russ and myself tend to disagree...i dont think any of the above factors you listed came into it.

lol

its horses for courses really...some people like twins...others prefer single.

ive switched from twins to single and to be honest...singles suck!....so far anyway.

Edited August 7, 2009 by DiRTgarage

[Cjmartz2k]

I don't prefer either. I think it depends on the particular turbo or turbos. R32-33 N1's suck compared to a lot of other ones out there. I don't think one type of set up is better or worse than another just because it's twins or a single.

oh and the ITB difference to a Single is rather evident if you look at the likes of a GTI-R compared to the same spec SR20DET with a single..

I really think the ITB's only help with throttle response and not low end grunt, but I have no hard facts to back that up. Now if you compare the RB25 long runner intake and single TB compared to the short runner RB26 intake with ITB's, the 25 will win out down low every time. Higher in the rpm range is different though.

BTW, I didn't know the GTI-R had ITB's on an SR. Cool.

Edited August 7, 2009 by Cjmartz2k

[aDrew_C]

Not really sure what weight and piping have to do with response/spool/performance...

Just adding another point to the debate. If everything else is equal you have to consider the extra weight as a negative for twins.

Yes if you want some crazy unstreetable power then my points about singles don't hold as true. For people who care about response twins are fine in bolt on replacement form because of the cost saved and the standard look to the engine bay, but for under 400rwkw a good single setup makes more sense when it comes to what matters to me - torque curve vs weight. Going by that merit an LSX is the best option for the money..... what was that I said about this thread getting a bit out of hand?

Edited August 7, 2009 by aDrew_C