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Old 03-19-2008, 12:50 PM   #1411
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Originally Posted by razzor View Post
How do you run under or overdrive ???
By tyres sizes ?? or ??

Rubber tires is done via front pulley change. You usually have to find an aftermarket pulley or adapt one to work.

Foam tires can be done like gas cars with different size tires as you had mentioned.

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Old 03-19-2008, 12:55 PM   #1412
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ammdrew, thanks for posting hobbyplex's number. I called and got a rear gear differential...
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Old 03-19-2008, 11:42 PM   #1413
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To overdrive the car it's actually very simple. You will need a Tamiya 36 tooth diff pulley (from the 415 with every other tooth cut off) and a Schumacher Mi3 rear belt to get the tension normal.

The Tamiya pulley does use 10 diff balls rather than 8, so you'll need a couple extras.
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Old 03-20-2008, 12:31 AM   #1414
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To overdrive the car it's actually very simple. You will need a Tamiya 36 tooth diff pulley (from the 415 with every other tooth cut off) and a Schumacher Mi3 rear belt to get the tension normal.

The Tamiya pulley does use 10 diff balls rather than 8, so you'll need a couple extras.
Would you use this pulley up front or rear ???
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Old 03-20-2008, 01:07 AM   #1415
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razzor- You would use that pulley in the rear for overdrive. I have used a larger pulley in the front for underdrive. I am not sure if Randy dremels his pulleys to remove every other tooth like I used to with the Xray, but you can buy a Tamiya pulley that has the 36 tooth diameter but only has 18 teeth.
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Last edited by TeamButter; 03-20-2008 at 12:24 PM. Reason: Mistake
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Old 03-20-2008, 02:11 AM   #1416
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interesting guys, thanks.
Would you worry about what % of overdrive you run ???
Overdrive is popular for gas onroad but didnt expect much use in electric onroad.
Under what conditions or for what reasons would over drive be favoured ?
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Old 03-20-2008, 09:31 AM   #1417
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Actually you would need to run that pulley in the rear to achieve overdrive. I'm not sure if their spool pulley is the same mounting diameter as ours, but you could make one fit for underdrive.
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Old 03-20-2008, 09:33 AM   #1418
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One more thing, honestly it seems like 95% of the people who have tried my overdrive setups will overheat their tires because they are very aggressive. It's helped me to crank out some fast laptimes at certain tracks, but if your not careful you'll end up going slower overall if you overheat the tires early enough in the run.
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Old 03-20-2008, 10:42 AM   #1419
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Quote:
Originally Posted by Randy Caster View Post
One more thing, honestly it seems like 95% of the people who have tried my overdrive setups will overheat their tires because they are very aggressive. It's helped me to crank out some fast laptimes at certain tracks, but if your not careful you'll end up going slower overall if you overheat the tires early enough in the run.
Overheating tires in warmer weather is where the issues came up for those trying to immitate the overdrive master, Randy Caster.

Maybe not using front tire warmers, and slightly changing front settings to reduce front bite/traction will help, in hot weather.

Butter: Maybe front overdrive will be a good thing to try Wednesday nights at MDI with the good traction and cooler temps.
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Old 03-20-2008, 12:03 PM   #1420
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Actually I've heard of it happening on carpet as well, but I ran it at the IIC with no problems...
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Old 03-20-2008, 10:53 PM   #1421
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SER401112-Rear Solid Axle Spool
When would you run a spool in the rear? Maybe I am missing something.
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Old 03-20-2008, 11:09 PM   #1422
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SER401112-Rear Solid Axle Spool
When would you run a spool in the rear? Maybe I am missing something.

I can't imagine a situation where that would be beneficial on an electric sedan....
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Old 03-20-2008, 11:30 PM   #1423
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Drifting. Seriously.
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Old 03-20-2008, 11:48 PM   #1424
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And drag racing!!!
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Old 03-21-2008, 02:40 AM   #1425
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SER401112-Rear Solid Axle Spool
When would you run a spool in the rear? Maybe I am missing something.
Drifting definately.
spool in the rear with oneway up front.
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