Belt for 2.9/6lb and 3.5 alt pulley, with 4 idlers PLEASE HELP

[FastNick01]

First and foremost I used the search plenty of times and looked into the belt quide on this site but the combo's are off by a little.

I will be running an RR upper 2.9/6lb metco lower combo on a stage 4 eaton, 3 100m idlers and 1 90m. 3.5 alt pulley. Combo will be run on E85 with sufficient cooling mods don't worry.

Please someone help me with belt size.

Thanks,
Nick

 

[supraman1990]

My exact combo I'm working on, curious on the answer for this as well

 

[FastNick01]

I've narrowed it down to 4 possibles I think will work but still not sure
K080797
K080806
K080810
K080816

Someone has to be running this combo, I really don't want to have to buy all 4 install/return etc.. HELP

 

[ninty9cobra]

Check on metcomotorsports.com they have section that will give you the specs on the size belt to run with the different combo size pulleys.

 

[CompOCobra04]

I have the same setup... used a 81.5 inch belt.

 

[Shadow Grey 03]

I will check when I get home. I run the same pulley combo.

 

[FastNick01]

Thank you everyone for the help

 

[EV1L_SVT]

I'm running a 3.40 upper, metco 6lb lower with 3-100mm idlers and 3.5 alt pulley. The idler next to the crank pulley is at the top bolt location. I'm using a Gatorback 080839 belt and it's just barely on the tight side according to the tensioner. It took me 4 belts to find the perfect size.

 

[foxman92]

I have the same setup... used a 81.5 inch belt.

x2 and mine was a TIGHT fit!

 

[Posi]

4080810 Gatorback is what I'm using on my car.

 

[04svtsnke]

I use the 81.6 belt with my setup which was 3.1,6lb and 3.5 alt pulley. Belt was tight.