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What size belt would I need if I were to run a 2.93 upper pulley, 4# lower, and SFPHQ 100mm Idler Pulleys?
 

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The Ubiquitous Jimmy V.
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We need a chart for these different combinations other wise Guys will need to buy 3 or 4 different belts.
My guess would be 76in belt..


jim v.
 

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SVTVenom said:
What size belt would I need if I were to run a 2.93 upper pulley, 4# lower, and SFPHQ 100mm Idler Pulleys?
I am using the Gatorback 4080772 without the 100mm pulleys. Call Terry at SFPHQ and ask him if the idler pulleys would affect your setup. Based on where my tensioner is adjusted I would say the above part number should work fine.
 

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Pushrod Dinosaur
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here's my contri to the list. these are what I've used:

2.80 pulley 73.5 gatorback
2.80 pulley + 100mm idler pulleys 74.0 gatorback

here's what i found posted by Terry @ SFPHQ

Goodyear Gatorback Belt 4080750 - fits 3.4" Pulley
Goodyear Gatorback Belt 4080745 - fits 3.2" Pulley
Goodyear Gatorback Belt 4080745 - fits 3.1" Pulley
Goodyear Gatorback Belt 4080740 - fits 2.93" Pulley
Goodyear Gatorback Belt 4080735 - fits 2.80" Pulley

gary
 

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Pushrod Dinosaur
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Re: Re: Proper Belt Size

Bingo13 said:
I am using the Gatorback 4080772 without the 100mm pulleys. Call Terry at SFPHQ and ask him if the idler pulleys would affect your setup. Based on where my tensioner is adjusted I would say the above part number should work fine.
I had to add 1/2 inch when adding the 100mm idler pulleys

gary
 

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Re: Re: Re: Proper Belt Size

SVTyballz said:
I had to add 1/2 inch when adding the 100mm idler pulleys

gary
I was wondering how much belt length you needed for the 100mm idler pulleys. Thanks for the info. We need a chart for the lower pulley combinations also. I bought three different belts before finding one that worked correctly when I added the lower pulley.
 
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