can you people w/ the greddy twin turbo tell me what air fuel ratio you are running. i talked to greddy today and they told me to run 11 to 1 . i thought that sounded a little to rich . thatnks for the help.

 

10 is too rich, low 11 to high 11, very low 12 is perfect

 

i assume you meant 11:1 compression. That is pretty good, if you arent retarding timing or if you are using 91 octane fuel...add try to get as close to 11:1 as possible. With timing retard provisions and 93 octane fuel, 11.5:1 is a safe target.