Port and polish worth something???

[John Z Williams]

Here is the before and after on the dyno. The after is with the porting of the exhaust manifold and the turbo housings and Nicks new intake pipe. I have too much air now and will have to get another ecu most likely, the mixture is on the lean side again, I just can't leave well enough alone. Darn, now I know why a custom tune is so valuable in high hp applications.... I just found out I got some bad gas from the small station in Berthod and its 93 octane... It was stuttering on the dyno and on the way home, topped it off with Shell 91 and the miss and stuttering went away. Just my luck, now I have to dyno all over again... I think the mixture is acurate anyway. Mr. rich ecu going back in for the next test. There was snow and temps in the 30's today. I gained 20whp and 30wtrq by the end, but the a/f is a little lean.
John