Tim Stamper

88t will fit, I just prefer a larger gear. Standard gear is a 72t(48p), so the 64p equivalent is a 96t.

To figure it out do a little algebra:

72t---Xt
--- = ---
48p---64p

To solve for Xt, it's (72x64)\48 which gives you 96.

I kinda like a flywheel effect on my drivetrain with a larger spur. My car rolls through the corner better.

TS

anthony390

thanks and what would a 92t be equal to and also 39 pinion

Thanks just alittle still

LOL

Thanks

Tim Stamper

If you are asking for the 64p equivalent of above, here it is:

a 122 or 123 tooth spur and 52 tooth pinion.

Take 92 and multiply it by 64. Divide that number by 48 and that is the 64p equivalent of the 48p spur gear.

Take 39 and multiply it by 64 and divide that number by 48 and that is the 64p equivalent of the 48p pinion.

you still confused?

TS

anthony390

umm i got 122.666666 for the spur

is that right or did i do something wrong

and for the pinion i got 52

i think i did something wrong cuz there no way i can get a 122t(48p)
and a 52t(48p) in my tc3

Tim Stamper

Kinda but not quite. You did the math right, but I don't think that I quite understood what you wanted.

re-read my posts and follow the directions.

Was the 92T gear a 48p or 64p gear? Was the 39t a 48p or 64p gear.

Lets try this. How 'bout the other direction. The 92 and 39 are 64pitch and the 48pitch equivalent is 69 tooth spur and a 29 or 30 tooth pinion. The math gives you a 29.25, so a 29 or 30 would be a close match.

The answer of 122.666666 is correct if 92 was a 48 pitch gear and you are looking for a 64 pitch gear that is the same size. There will not always be perfect tooth counts due to the different tooth pitch.

TS

anthony390

oh i c

lol

92 tooth 64 pitch = 69 tooth 48 pitch

39 tooth 64 pitch = 29 tooth 48 pitch

thanks

and oh ya whats the smallest 64 pitch spur gear i can get to work on my tc3?


Thanks again

Tim Stamper

No problem.

Actually, I haven't run anything other than a 100 tooth spur on the car, ever.

Some people say 88, that's a pretty small gear.

Tim

burbs

iTrader: (1)

if you have problems setting your gear mesh with 64 pitch gears here is a tip..

Take a amsll piece of kleenex tissue. Put it between the pinion and pur in the mesh.. put it tight, then roll the gear and take out the kleenex.. this is what the older guys who cant see well do around here.. It helps get the mesh right..

wd40prerunner

iTrader: (8)

the stock pitch on a tc3 is 48 ?

Grizzbob

iTrader: (2)

Correct, the TC3 & TC4 both came with a 72 tooth 48 pitch spur(but I'm not sure if the TC5 does, don't know what it comes with)....

tc3team

I've raced a tc3 for about 5 years (until this year) and never felt the need to go over to 64dp. It still has the original kimbrough spur gear in it now.

Providing the motor bolts are tight and the meshing is good then it will last for ages.

However, if you really want to fine tune your gear ratio and run 64dp just be wary outside of small stones etc that can jam up the spur gear and give you dnf's

As has been said, a 96 should be ok for most tracks, but if you know the final drive ratio of the tracks you typically race at, head over to http://gearchart.com/ and try experimenting with different spur gear sizes and see which spur gears fit the gearing bracket you're trying to achieve

hth

kufman

iTrader: (6)

My biggest problem running 64p on tc3's and tc4's has been the quality of the hub they bolt to. I bought 3 plastic hubs for my tc4 and not one of them spun correctly. This is why I couldn't use 64p on my associated cars. This problem probably goes away if you get a better hub from someone like IRS. My TC5 hasn't had any trouble at all running 48p, but I have not tried 64 yet. The stock 48p is 87 teeth.