blowers and IDLE !!! up and down !!!!

[suns68]

why do so many supercharged cars idle up and down ?? room room rooom !!????? ITS NOT TO BAD !! but it bothers me !!! rooom rooom !! thanks guys !!! iac , is set slow !!

 

[540Malibu]

improper tuning. depending on the cam. some other variables...blower surge...need a bypass valve....could be one of many things.

 

[blacksunshine2]

My car has stock cams and a big bypass, but occassionally it will surge like crazy. It doesn't bother me but I do wonder what i could do to tune it out. Anybody have any ideas?

BTW, this is my first post. I have found this site very helpful in learning about my FAST system. FAST should recommend this site on its main webpage. GNs rock!

 

[krom]

Most supercharged cars that idle search have a lean condition. My mustang would idle search once in a while until I got a dyno tune. One other way is to clock the air meter, sometimes this works.