Quick question before install saturday...

[SunburstGoldGT]

Im gettin my steeda underdrives installed saturday and i was thinking about it and wondered since the sizes changed on the pulleys, would i need a different belt, but then i thought just the ratios of the pulleys changed, I need help because i basically confused myself trying to think of how they work. Also if i use the same belt, should i get a new one since i will already have the old off anyways?

Thanks

 

[COramprat]

The crank pulley is smaller but the water pump and alternater pulley is larger. No need to change belt size.

 

[downsouthman1]

Yes. In line w/ Coromprat the alternator & water pump pulley's are larger so they turn slower. That is what underdrive basically means. Due to the fact that the alternator & water pump are being underdriven there are now freed up horses. Running a smaller crank pulley allows it to spin faster, applying th freed up horses directly to the crank, increasing HP & TQ. Make sense? How many miles are on your car. I'm on my 3rd belt @ 43000, but changed to my 2nd belt @ 5000 cuz Ford thought my Throwout Bearing squeaking was my belt & I didnt' know better then.

 

[SunburstGoldGT]

Hey thanks for clearing that up guys, and DownSouth I have just over 42000 on my car and am still on the original belt, no squeeks or anything, but i think i might as well go ahead and get a new one for the install.

 

[Venom4.6]

With 42,000 miles on the belt, I'd go ahead and change it. I change the belt on all my cars every other year no matter what.