Originally posted by MiamiDave
Powershifting/speedshifting or quick-lift shifting do the opposite- they cause the car to jump, shudder, and more often than not-leap forward a few feet.
So by quick lift shifting, I am banging my shifts fast w/o danger of an over-rev or smoked clutch (C5 weak points, along with the shifter) but I since I don't quite match the revs in time (they are still up at 5800 rpms) the engines rotational momentum cause the tires to bark as they try to match 5800 in the next higher gear in .25 of a second. With my foot off the gas, the revs get yanked down but I'm still into the car's momentum. So I don't lose-but I don't gain either. At the track with the runcraps I had to slow that shift down even further-if I disrupted the suspension by breaking the tires-I would get violent wheel hop.
Your serious? So what your saying is that by not lifting your foot of the gas and shifting that your losing momentum? But when u lift your foot off the gas to shift your not losing momentum? That's funny cause everytime I shift my car(gas pedal never leaves the floorboard) my car lurches forward. But if I were to lift on the gas the nose takes a dive. With your car running on crappy radials u have to lift cause now u have the issue of no traction into the equation. Take a pass with some 15" DR's or slicks. Make a pass lifting the gas then make one powershifting. You'll see the difference in mph. I do everytime I race. If I don't powershift my mph is down. -Mark