PRD Gearing

Brian Degulis · Posted: Sun Feb 03, 2013 3:39 pm Post subject: PRD Gearing

Does anyone know a starting point for PRD gearing. It's got the standard 11 T clutch. I just want to get in the ball park before going to the track.

Brian

Matt Koerner · Joined: 08 Apr 2011 Posts: 28

Gearing is different for every track. What track are you going to?
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Brian Degulis · Posted: Sun Feb 03, 2013 7:17 pm Post subject:

Anderson but just trying to get in the ball park. Rotax would run around 12/80 there.

Brian

Andy Seesemann · Posted: Sun Feb 03, 2013 7:47 pm Post subject:

Brian,

This may be a trick question. 95% of PRD users are part of the Spec PRD program which uses the small carb and a spec gear. In SoCal, the spec gear for Spec PRD Sr. is 81 +/- 1 tooth. They do not have the flexibility in gearing as many other classes.

Start there.

A
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Brian Degulis · Posted: Sun Feb 03, 2013 8:13 pm Post subject:

Thanks that's a start. I'm using the large carb and not running the spec PRD class we just run TAG with a weight advantage.

Brian

gregg boyce · Posted: Mon Feb 04, 2013 9:42 am Post subject:

Brian,

Never been to Anderson but NCMP would be ~ 11/77 for Leopard and ~11/75 for PRD.

I would take the lepard gearing for Anderson and drop 1-2 teeth.

GB
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Brian Degulis · Posted: Mon Feb 04, 2013 10:08 am Post subject:

That's logical. It's got an 83T rear sprocket now and just running down the street it feels like the ratio is to high. I'll have to get to the track do the break in and figure it out from there but I'm guessing around 78-79 is proubably where I'll end up.

Brian