Took my car down to Velos this morning, to run it up on the rollers.
Wanted to test various changes, to see which gave the best power.
1st Spec (was same as at Northampton Motorsport)
which includes :- Manual Boost Controller, K&N 57i & Ecotek Valve.
Gave out 188 bhp and 204 lb/ft which compares to Northampton @ 185.6 and 203.
Same as above, but K&N57i replaced with de-restricted airbox and Ramair Panel Filter.
Gave out 184 bhp and 197 lb/ft.
Same as above, but manual boost controller removed and std boost control solenoid re-installed
Gave out 192 bhp and 199 lb/ft.
As above, but actuator setting changed so at far end (strong setting).
Gave out 202 bhp and 230 lb/ft. (ran up twice and got same figures)
For the first time, we got the turbo glowing!
Due to the above results, I have now put the cone back on.
Velos rollers are'nt that bad, and have been calibrated recently.
Fan was positioned centrally so to give sufficient airflow to the intake and intercooler.
Used the plug disconnection method to disable traction control.
Cost me £40, for almost 1hr 30mins time (gave them an extra fiver as they were very helpful).
They printed me out a nice graph as well with the final figures which were 202bhp (162@wheels) @ 5505 rpm
Interesting that on std airbox, it is a final blip near the rev limit which gives the highest bhp figure.
With the cone the power is more constant and does not drop off.
They also showed me the power graph of a 1.6 Corsa with Unichip and throttle intake, 145bhp!