Originally posted by Paul Kienitz:
Originally posted by fingas:
ok i slept through this part in physics but it is easy to see where you can free up power using a udp. Here is an experiment for you, get a round wooden rod and get a moderately heavy pulley shaped object that you can put on the end of the rod and try to spin it. Now put a similar sized but much lighter pulley like object on the rod and try to spin it see which one is easier to get started.



Yep, that shows how your engine will rev much faster with a lighter pulley. When you're in neutral!




ummm works the same in gear too... I have had a few people drive my car before and after the UDP and all of them say that my gas pedal is touchy RPMs climb much faster with the pulley in or out of gear.

2003 Subaru WRX some mods Even if you don't have the answer, you certainly have to admire the problem. aka ZetecRacing