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mkkrs1
06-30-2006, 11:26 PM
what length belt do I need with a 2.81 uppper, billet flow 4pc idler, and 2pd lower.

03slidewayzSVT
07-01-2006, 01:52 AM
I know I have a 2.76 upper 4Lb lower and Billetflow 4 piece Idler... My belt I use that is VERY tight I mean Holy crap tight is a NAPA 25-080797 which is 79.7 inches long......I got a spare you could try if you want:thumbsup: before spending $40 each:eek:


Adam

InfamousSVT
07-02-2006, 04:49 AM
A 78 5/8 is the one I used with the same set-up Mike, that should take care of you........or you could just get the Riechard Racing Manual Tensioner and chose about any belt length and never worry about belt slip again. :D :thumbsup:

Big T
07-02-2006, 01:30 PM
Yeah 78 5/8" should be ok. Make sure that you put the lower idler on the upper position on the lower pulley bracket plate. I have the exact set up with a 77.4" belt. I had to put the lower idler on the lower bracket position to make mine fit. The advantage of the upper position is better belt wrap but will require a longer belt. Mine is very tight. Belt size selection is very aggravating.

93KingCobra
07-02-2006, 10:23 PM
Straight from Billetflows web site.....
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

No Idlers

Pulley Size.....Belt Size.......Gates Part No......Gatorback Part No.
3.65 (stock).....75.1" .............K080751................4080750
3.40................75".................K080750................4080750
3.10................74.5...............K080745................4080745

With Single Snub Idler and Bracket Kit

Pulley Size.....Belt Size.......Gates Part No......Gatorback Part No.
3.65...............75.5"...............K080755................4080755 (can not use New Bracket)
3.40...............75.1"...............K080751................4080750 (can not use New Bracket)
3.10...............74.5"...............K080745................4080745 (must use 92mm Idler Pulley)
2.93...............74.5"..................K080745................4080745 (with 100mm Idler)
2.76...............74.5"..................K080745................4080745 (with 100mm Idler)

With 4 Pulley snub Idler Kit (3-100mm and 1-92mm)

Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............77"...................K080772...............4080772 (can not use New Bracket)
3.40..............76.5"................K080765...............4080765 (can not use New Bracket)
3.10..............75.5"................K080755...............4080755 (must use 92mm Idler Pulley)
2.93..............75.5"................K080755...............4080755 (with 100mm Idler)
2.76..............75.1".................K080751...............4080750 (with 100mm Idler) (Stock Belt)

With 4 Pulley snub Idler Kit (3-100mm and 1-92mm) and 2lb Metco Lower kit

Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............XX.X"................K080XXX...............4080XXX (can not use New Bracket)
3.40..............XX.X"................K080XXX...............4080XXX (can not use New Bracket)
3.10..............XX.X"................K080XXX...............4080XXX (must use 92mm Idler Pulley)
2.93..............78.0"................K080780...............4080780 (with 100mm Idler)
2.76..............XX.X"................K080XXX...............4080XXX (with 100mm Idler) (Stock Belt)

With 4 Pulley snub Idler Kit (3-100mm and 1-92mm) and 4lb Metco Lower kit

Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............XX.X"................K080XXX...............4080XXX (can not use New Bracket)
3.40..............XX.X"................K080XXX...............4080XXX (can not use New Bracket)
3.10..............XX.X"................K080XXX...............4080XXX (must use 92mm Idler Pulley)
2.93..............XX.X"................K080XXX...............4080XXX (with 100mm Idler)
2.76..............XX.X"................K080XXX...............4080XXX (with 100mm Idler) (Stock Belt)

With 4 Pulley snub Idler Kit (3-100mm and 1-92mm) and 6lb Metco Lower kit

Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............XX.X"................K080XXX...............4080XXX (can not use New Bracket)
3.40..............XX.X"................K080XXX...............4080XXX (can not use New Bracket)
3.10..............XX.X"................K080XXX...............4080XXX (must use 92mm Idler Pulley)
2.93..............XX.X"................K080XXX...............4080XXX (with 100mm Idler)
2.76..............XX.X"................K080XXX...............4080XXX (with 100mm Idler) (Stock Belt)

With 4 Pulley snub Idler Kit (3-100mm and 1-92mm) and 8lb Metco Lower kit

Pulley Size....Belt Size........Gates Part No......Gatorback Part No.
3.65..............XX.X"................K080XXX...............4080XXX (can not use New Bracket)
3.40..............XX.X"................K080XXX...............4080XXX (can not use New Bracket)
3.10..............XX.X"................K080XXX...............4080XXX (must use 92mm Idler Pulley)
2.93..............XX.X"................K080XXX...............4080XXX (with 100mm Idler)
2.76..............XX.X"................K080XXX...............4080XXX (with 100mm Idler) (Stock Belt)