We've had a P1 for around 3 months and had the de-cat downpipe and up-rated brakes done.

Recently we took the car on Star's rolling road then phoned John to ask if he could do anything with it to get a bit more bhp - here are the results.

1st run shows the figures before John did anyting.

1st Run
P-norm 293.5bhp
P-eng 277.0bhp
P-wheel 175.5bhp
P-drag 101.5bhp
Torque 267lbf-ft
Intake 0.8-1.0 bar dipping at high revs

2nd Run
P-norm 299.0bhp
P-eng 282.0bhp
P-wheel 205.0bhp
P-drag 77.0bhp
Torque 283lbf-ft
Intake Steady 1.2bar at high revs


The car feels so good above 3,500 revs and Johns not finished. He's fitted an STI-5 ECU and re-mapped to suit. Spent around 4 hours on Friday in terrible weather and has still to make a few tweaks to get the car just right - all on the basis that if I'm not happy he'll replace the original ECU at no cost. I only took the car on the RR to confirm the difference was physical and not just my imagination.

I would like to personally thank John for his patience and Jim at Star for fitting me in at short notice and intend running the car again with a modified mid/end pipe plus a Dawes.

A very happy,

Mike G

 

The drag figures are very different between the two runs, making the RR results difficult to interpret... there is a hidden variable in there somewhere. 29.5 wheel horsepower improvement is nice - of course that is the figure I prefer and fits in with subjective road experiences by the owner and myself, but that would suggest at least +40 flywheel improvement and it is much lower. Who knows?

 

Did you sort out the odd boost dip seen on the rollers?

A

[Edited by AlanG - 9/1/2002 10:28:39 AM]

 

See the post in General Questions.