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Discussion Starter #1
I'm in the middle of my Vortech supercharger install and not sure what size belt I'm going to need. I've got a 2003 Mach 1 engine in my GT with the stock 99 GT harmonic balancer. Does anybody know what belt I'll need if I use the 99 GT piece? The diameter on mine is about 5". If somebody can measure the diameter of their Mach 1 balancer I'd really appreciate it. Thanks!
 

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the mach piece is closer to 6.75" across from lip to lip
 

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Discussion Starter #3
Wow that was fast! Thanks! I'll probably get the Mach piece then.
 

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luckily for you I kept my stock piece when it blew apart on the dyno and knew where I had it on my shelf of shit Ive broken.

Apparently its not all that uncommon for the grooved ring to separate from the bonded rubber so personally Id either buy a brand new one or a nice aftermarket dampner, I went with innovators west 8rib (you can run a 6rb belt on it, just use the back six ribs towards the motor...then youre ready if you ever need to go 8 rib)
 
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