The O2 readings from the Racepak worked VERY good with my pump gas combos. Now that I switched over to alcohol and even after switching the Racepak over to read alcohol I'm missing something on the read-outs. I leaned out my carb last October to try something and even with the colder temps it loved it and ran great. Lots of my Friends now run alcohol and suggest I aim for 1150 degrees and forget about it till I have a BIG weather change. Alcohol is more forgiving.

1970 Duster
Edelbrock headed 408
5.984@112.52
422 Indy headed small block
5.982@112.56 mph
9.42@138.27

Livin and lovin life one day at a time