I have a S1 rs turbo with a long list of modifications. I have had it on a dyno, where it had some fuelling issues but it only cam out around 190 BHP.

This is on, newman cam and solid lfters, cossie fuel pump, acralite 1mm oversized pistons, larger throttle body, 5th injector etc. etc. I was limited to 19 psi.

Had the car setup at Motorsport and it now runs a good stable 16 psi (or a little below now) and I guess runs the same power.

I know I still have standard rods (the previous owner told me) and I am unwilling to go ZVH or Cossie management as I still want to retain the S1 originality as I plan to go concourse or modified concourse at a later date.

What should I be running? and would could I safely run?