Not bad, seems that a limit has been found on the hardware.. I have read elsewhere (uk forum) that 430bhp is the limit of the 4x4 manifold.. although if Phil is making the same power and hitting the same 'wall' as you with a 2wd drive manifold i suppose that shouldn't be the limiting factor at this point.
How does it compare to the last turbo ? What's the difference in torque ? Does it feel laggier at all? When I was testing my car with the 02 meter on the street (t3/t4 standard rear wheel and housing and L6 management) and my vaccum line blew off the compressor housing I was hitting the 30psi boost cut at 4200rpm.. so yours looks pretty responsive, considering its horspower potential.
Well done, your car makes me jealous.. but it's definately something for someone like me to strive towards
