belt size for u/d

[tstang21]

i just purchased march 3pc pulley set. im going to remove the smog pump as well. now i spoke to march and according to them, the stock belt fit would fit but w/o smog pump, its 2" less than factory size. what size belt should i get. im not sure


thanks

 

[Chythar]

Each store has different brands of belts - tell the guy at the counter you want a belt 2" shorter, and he should be able to help. At worst, you can measure up several belts to find the right one. I would recommend buying a few belts of around the right size and trying them all out. Then bring back the ones you don't use.

 

[1slow95]

What I did was cut an old belt, install it, measure, then go to the parts store. You'll probably need 1" to 1/2" shorter to account for the tensioner.

Using all three UD pulleys will not change your belt length.

 

[legalize420]

without the smog pump its a straight shot from the tensioner to the crank. it will be more than a 2" difference. your going to need a belt around 89-89.5". as mentioned above you might have to try a few different belts.

 

[tstang21]

ah man. i dont want to spend more than $100 just to try on some belts. i know i can use the current belt and but to bypass the smog, what size did you guys go for ? the crank does seem a bit smaller and acoarse much more lighter

 

[legalize420]

my belt is 88 7/8" but i swapped my alternator pulley to a smaller size. you will be able to return the belts you dont use so its just more convenient to buy a few at one time instead of having to make a couple trips back and fourth. the only way the stock belt will work is if you keep the pump or buy a delete pulley.

 

[tstang21]

i might as well buy at least 3 belts. i want to remove the smog pump but 1 shop that works mustangs..no names...said that by removing the smog pump, the tensioner wont hold the belt long. only 6 months and then the belt gives away.

i have no idea

 

[legalize420]

i might as well buy at least 3 belts. i want to remove the smog pump but 1 shop that works mustangs..no names...said that by removing the smog pump, the tensioner wont hold the belt long. only 6 months and then the belt gives away.

i have no idea

the only way you're going to damage the belt is with misalligned pullies. other than that the the only thing to watch out for is the belt will strech slightly after it gets broken in a bit. if its not tight enough the tensioner will knock against the stop. there are two marks on the tensioner. as long as you are inbetween those two marks you are good. you might want to swap out the idler pulley. i got a new one from napa and it does not have the lip on it like the stock one. it makes it much easier to get a tight belt on there. you can also install an idler pulley on the tensioner to take up more of the slack if needed.