bradc
12-03-2007, 08:01 AM
Quote from atpturbo.com when I was asking them about GT28R and GT28RS turbos:
We have run GT28RS turbos in twin applications on 2.7L (Audi RS4) engines and we love them. They are flexible enough to make over 600 WHP (which the GT28R) cannot do. The response is great still on this size displacement.
Our best guess would be full spool by 4800 rpms on the GT28R's and about 5100 to 5200 on GT28RS. This is assuming you'll be running about 1.5 bar+.
They also said that I should expect the boost to start getting serious at about 3500rpm, and up to 0.7bar by about 4000rpm, maybe a little sooner.
I think I will stick with GT28R's though, they make the most sense to me, I'm sure I will kill myself with 600 wheel horsepower!
We have run GT28RS turbos in twin applications on 2.7L (Audi RS4) engines and we love them. They are flexible enough to make over 600 WHP (which the GT28R) cannot do. The response is great still on this size displacement.
Our best guess would be full spool by 4800 rpms on the GT28R's and about 5100 to 5200 on GT28RS. This is assuming you'll be running about 1.5 bar+.
They also said that I should expect the boost to start getting serious at about 3500rpm, and up to 0.7bar by about 4000rpm, maybe a little sooner.
I think I will stick with GT28R's though, they make the most sense to me, I'm sure I will kill myself with 600 wheel horsepower!