dammit but which turbo?

[Guest drift_me_silly]

2200cc worth of RB20, 300rwkw's desired, 9000rpm available and 9.5:1 compression. which turbo?

He is clueless.

[meggala]

compression is a bit high but a 3037s from hks would fit the bill

meggala

[Guest drift_me_silly]

meggala - do you think a 3037 would require more than 1.5bar to accomplish 300rwkw?-i'm looking at a VVT head...

[meggala]

1.5 1.6 bar I have seen these make 300 rwk on an sr 20

forget the vvt head

[Guest drift_me_silly]

...you're serious about the head? i can see the ad now: 2.2ltr RB needs torquey friends, will pay for company...Is it true that RB25's have VVT?...more pain than it's worth, you're thinking...

[meggala]

not thinking i know most peopel who go for 300rwkw plus use gtr style solid lifter cams and convert the rb 25 vvt head

[Guest drift_me_silly]

3037 it is. thanx for the advice.

[Sydneykid]

Wow drift_me_silly, 300 rwkw out of an RB20DET, 480 bhp is a brave target. The best Gibsons could get out of their RB20 was 460 bhp, and that was only for short periods of time. It was more like 420 bhp for any longer races. Plus at that output they had to have a close ratio gearbox as the power band was very narrow.

The capacity increase of 200 cc's ain't gunna make that much difference.

If I get the chance tomorrow I will sit down and work out the torque curve, piston speed and rod loadings at 9,000 rpm, should be very interesting.

Can I respectfully suggest that you work out the costs and then compare it with doing a RB30/RB25 hybrid. For that amount of power you may find it cheaper than a high rpm RB20. I can guarantee that the servicing costs will be lower.

Hope that helps