Belt For 2.80/4 With 4pc Pulley Set

[boosty]

:fm: I have not found the belt size for 2.80/4# lower with 4pc idlers think it is 4080780 gatorback

 

[boosty]

come on somebody

 

[Rick James]

:read:

http://www.svtperformance.com/forums/showthread.php?t=276474

 

[97CobraTT]

http://www.billetflow.com/supercharger_pulleys.htm

 

[Quick Strike]

Using a Gates 080785 or Gates 080790 here with the lower pulley in the second of three holes.

 

[NotoriousGT350]

I'm running a 2.80/#4 combo with a 3.2 Atl pulley and a Gates 080780 belt and a new Billet Flow bracket with a 100mm idler. I'm getting a lot of belt slip after 5000rpms with MAF counts up and down and noticeable belt dust. I hit 11.6-11.7 a/f then at 5000rpms it dips to 10.3 rich. An employee at Napa said a 080780 belt I have measures 78.5". I'm going to try a smaller Gates belt that measures 78" and see how that works. I have not even put on my other 3 idlers yet.

I also need to check my lower idler to see what position it is in. Anyone have a suggestion whether it needs to be upper or lower?

I need better numbers than a 490rwhp/522rwtq with my setup.

 

[Screamin Cobra]

Using a Gates 080785 or Gates 080790 here with the lower pulley in the second of three holes.

Seems to be about right.

 

[boosty]

think I am going to try 4080797 gatorback