the "performance curve" they did is based on WOT(pedal to the floor) and basically 0" of vacuum and 12/1 A/F....adding vacuum advance doesn't change that at all.... it only adds to the timing under light throttle
mount a vacuum guage in the car, 70mph crusin your vac is 18-20", A/F is 15/1, motor can handle 10+* more timing btdc to have a more "burn time" using a vacuum advance =better mpg
agree with Guy above, it's not a must have, it does help many cars be more pedal responsive around town, can help a little to keep plugs cleaner, can help auto trannys shift correct, long list of possible small benefits for how the car behaves
first check if yours is adjustable, stick a 3/32" hex in the snout...see if it turns either way....post answer?
sidenote: goal of messin' with the rubber parts on the other thread is to make the car "cocked for launch", "instant power transfer" like a sprinter in the starting blocks...makes a big difference for 60' times in a heavier car
Last edited by red65mustang; 02-06-2007 at 05:03 AM.