Belt to bypass smog with underdrives?

[svtlightning]

Hey,
I seen a thread a little while back about this but i coudn't find it. Does anyone know what the belt # is to bypass the smog pump with underdrive pullies? Any help would be great. Thanks Jeff

 

[svtlightning]

I found the thread. It said it is a 90" belt. If anyone differs please let me know. Thanks again.

 

[svtlightning]

l

 

[baby2000]

I removed the smog pump 2 weeks ago and the belt size that finally fit was the 90 inch belt after 5 trips to the auto store.

 

[svtlightning]

Thanks baby2000.
Jeff,

 

[Muddmann]

for some reason, mine was a 91" belt...

 

[MO351]

So you can bypass the smog pump with it all still intact? And doing this with underdrive pullies on you would use a belt of 90 inches in length? Just trying to get it straight so I know what to do when I get my pullies hopefully here pretty soon. Does anyone have a particular part number (Gates or whatever)? This isn't it is it:
UNDERDRIVE BELT - Motorcraft # JK6-1001-A
Ford # F3UZ-8620-F

 

[svtlightning]

I was at this all weekend long and still no luck! I tried the 90" belt and i couldn't get it to fit, So I tried a 90.5" and it kept slipping off and the 91" was way too long for my truck.I did all of this in the parking lot of advance and autozone.If I had a 90.25" it would fit perfect. I have the march underdrives. Maybe it just wasn't meant to be for me. I guess it varies with trucks and tensionometers. Ill get it some day. CAN"T GET RIGHT that must be me.Later.
Jeff,

 

[Alex R]

forgive me for sounding stupid but where is the smog pump? And whou would you over look it. Anyone have a pic of there belt by passing the smog pump?

thanks Alex

 

[svtlightning]

Hey Alex,
Looking forward at your engine at the bottom left. Kinda looks like an a/c compressor. No shame. That is why there is a forum so everyone can learn from.
Jeff,