Under drive pulleys.... whats the diameter

[golfpro187ho]

can someone with underdrive pulleys measure them for me...im almost positive that my car has them because when i replaced the alternator my pulley and the stock alternator pulley were different sizes...goin to the track for the first time august 6th gonna try an squeeze out every lil bit of hp i can thanks in advance

 

[wytstang]

If your crank pulley looks like a donut and you h2o pump pulley looks like a hub cap you got pulleys.

 

[wytstang]

Here
http://forums.stangnet.com/showthread.php?t=476019&highlight=underdrive+pulleys

 

[golfpro187ho]

thanks for the link....i dont have underdrive pulleys after all.....the pictures really clear it up...but i have one last question...what size belt do i need if i still have airconditioning and smog pump....cant wait to get some ordered think it will really wake it up....thanks guys this forums the greatest

 

[stprorolla49]

holy **** golfpro...your back....remember teh days when we bashed your wheels??? ahh good times......good luck at the track my friend

 

[wytstang]

none stock belt works just fine. I felt a nice little SOTP gain, it felt like it revs up faster.