Rolling Road again
Posted: Sat Sep 25, 2010 5:35 pm
Back to ATspeed this morning to get the final bits done to the map on the Omex and play with the cam timing.
State of play from the last session was 122 lb ft & 150 BHP at the wheels. I have since discovered that the throttle wasn't open completely when the pedal was on the stop....since corrected that.
So we played with the inlet timing, added some more fueling and then played with the exhaust cam. Final figures where....
146 lb ft & 165.2 BHP at the wheels (20% losses gives 206.5BHP & 182.5 lb ft). The car has gained over 20 lb ft all the way from 3000 to 6500 rpm. It is a complete missile now in comparison, I'm amazed the difference a few hours on the rollers has made. Still not the figures that where promised the supplier of the cams and heads but it is a really quick car now. Very pleased, we even had time to fit the new geared Hi-Torque starter motor. I now have to watch how much throttle I put on coming out of 2 & 3rd gear corners otherwise the R888s start to get a bit sidewise.
Given that I had 140 BHP when I bought the car it has come a long way
Looks like the exhaust headers is holding back the peak HP figure a little but even so very pleased.
State of play from the last session was 122 lb ft & 150 BHP at the wheels. I have since discovered that the throttle wasn't open completely when the pedal was on the stop....since corrected that.
So we played with the inlet timing, added some more fueling and then played with the exhaust cam. Final figures where....
146 lb ft & 165.2 BHP at the wheels (20% losses gives 206.5BHP & 182.5 lb ft). The car has gained over 20 lb ft all the way from 3000 to 6500 rpm. It is a complete missile now in comparison, I'm amazed the difference a few hours on the rollers has made. Still not the figures that where promised the supplier of the cams and heads but it is a really quick car now. Very pleased, we even had time to fit the new geared Hi-Torque starter motor. I now have to watch how much throttle I put on coming out of 2 & 3rd gear corners otherwise the R888s start to get a bit sidewise.
Given that I had 140 BHP when I bought the car it has come a long way
Looks like the exhaust headers is holding back the peak HP figure a little but even so very pleased.