or as a quick reference:
Posted by: Guy R
Here are the results from the low-mount turbos, on mine and Henry's car that we both own!
My car (2.6litre, wild cams)
Max on 2530s - 560bhp
Max on T618Z - 672bhp
Henry's car (2.8litre, mild cams)
Max on 2510s - 554bhp
Max on T517Z - 635bhp (only 1.5bar)
Conclusion, from 2 cars on rollers:
The HKS GT2510/2530 will struggle to get 600bhp.
The Greddy T517Z and T618Z are noticeably bigger, still low-mount and easily capable of flowing 600+ to 700bhp.
The above are facts as tested on a MAHA dyno in England.
Guy