Originally Posted by Rollinz

I made 545bhp on std head with 1.8 n/a cams and 106gti springs,

I am on a gt35 turbo tho, and that was at 1.4 bar

When we tried for more boost we got to 1.7 bar and 586 bhp and then that was it,
Valve float and surge,
So thats there limit what i found