GT500R-SP or GT3574R?

[speedjunkie]

Originally Posted by Dr-Rotor

Haa well then, if your on a proper race track like I do use the 500R or a GT3582R like I have. We seem to have crazy hp numbers down here for some reason but my car is pulling 600nm and 588rwhp on 20psi with a GT3582R. All custom fabricated bits and bobs.

We use a 130 ramp rate on a dyno dynamics if its any consolation to anyone.
The pic in my avatar is me during a superlap event.

Damn that's a nice pic! Nice car too of course.

Part of it might have to do with your altitude, or lack thereof haha. I live above 6000 feet, so our HP numbers are considerably lower. I dyno'd mine at 318 at altitude, but corrected (supposedly at sea level) was 403, at 6700RPMs at15psi in 3rd gear. That was on a Mustang Dyno too, and they're known for having lower numbers.

Originally Posted by David Jerome

500R is a 67mm turbo with some customization from A-spec. The site claims 3800rpm spool up but the lowest I have seen(I have seen about 5-6 dyno sheets) was around 41-4200rpm for 15lbs. Still a great setup but I think you would be better off($) piecing together your own kit.

I'm also getting the manifold and DP, both with a lifetime warranty, a Tial 50mm WG, and I'm paying extra for the WG rerouting to DP and ceramicoating everything. So I think it's well worth it.

Where those ones you've seen the HP model or SP model?

I've pretty much decided to go with the GT500R-SP.