Good Vac setting???

onefastmustang · #1 (**permalink**) 07-08-2007, 04:02 PM

I know that elevation can come into play with a vaccuum gague so let me put out there that my driveway is 3ft above sea level. That said while tuning my car today I am getting a steady 20" on the vac gague. Is that an acceptable amount..?? Idle is steady and the car seems to run really good. I am getting it ready for its visit to the BAR this week..

wtm442 · #2 (**permalink**) 07-08-2007, 06:43 PM

Twenty inches is more than 90% of the cars on this forum. You must have a mild cam. The AMOUNT of vacuum is not that important ... its how the car responds to the gas pedal when you stomp on it. On most Cobra's, turning the idle screws out 3/4 to 1 turn is about optimal. Of course, adjust the screws to get the best idle without chocking on the gas fumes.