Gearing for a new Track

[racing promotor]

Good laps peak around 5525, and or start to float the valves right at entry.

Have you ever seen your competitors tach, the guy doing the winning, to confirm he's not turning a lot more RPM than 5500.

 

[jaymancds]

Don't necessairly put the 12 on and just slide the engine forward.
You may need to shorten your chain. ... just depends

Whats the best way to do that? Just cut off how ever many?

 

[racing promotor]

Whats the best way to do that? Just cut off how ever many?

Take a chain break and remove links needed.

 

[racing promotor]

Even though you got the 12 driver DON"T start it with a 65 rear, start with a 12/60 and then IF you need to add rear gear do so once you prove RPM, reason for that is so you don't start gear bound and never figure it out.

 

[paulkish]

Whats the best way to do that? Just cut off how ever many?

Yes assuming you have a pin tool.
But from 15 to a 12 you may not have to do it, just depends on if it seems ok to not have to do it.
In general if something seems ok then don't worry bout it..
But if you have a thought something might not be ok with it, there is something that's not ok.

 

[alvin l nunley]

3 on the driver equals 12 on the axle, maybe 13, with the 12 driver, to get the same ratio. It's hard to guess what the ratio should be, but a wild guess would be 3-6 teeth less than that for the smaller track.