I reported in the EGT thread that the Weber settings that I thought were ideal for torque and power from my motor produced very high exhaust gas temperatures when running at a steady 5200 rpm in 4th gear - 80 mph. They were more reasonable in 5th. Installing bigger main jets,150 to 155, dropped the EGT at 5200 by 100 degrees but it made the AFR too fat in the high power zone so today I ran with 200 air correctors instead of 170's. It did the trick. The EGT's were pretty much the same as with 170 AC's and the AFR's in the high speed/part throttle were also about the same but the AFR in the high power zone was returned to where it needs to be.
So the message is that air correctors affect the whole of the WOT range but have little effect at part throttle, even at high rpm. Main jets influence part throttle even when the throttle plates are barely open if the rpm's are high.
And now to brag about the car. I did a rolling start 7 to 100 mph pull in 21.5 seconds up a gradient of about 2%. That was with 3 gear shifts. I think that says almost as much about RJ's gearbox/clutch/flywheel as it does about his influence on the motor.
76 Suzuki GT500
2011 Jaguar XKR
A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
Last edited by alfaparticle; 01-20-2015 at 09:30 AM.