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Old 09-13-2007, 01:49 PM   #3361
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Anyone have a starting point for gearing/mm rollout with lets say... 58mm tires.. for the 10.5 and 13.5 on carpet?
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Old 09-13-2007, 02:34 PM   #3362
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Maybe 33.5 mm for the 10.5 and maybe around 40 mm for the 13.5 ... that's just from my rule of thumb... not from experience though... some other guys might have more refined answers.
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Old 09-13-2007, 03:20 PM   #3363
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Quote:
Originally Posted by Steve Weiss View Post
Maybe 33.5 mm for the 10.5 and maybe around 40 mm for the 13.5 ... that's just from my rule of thumb... not from experience though... some other guys might have more refined answers.
what size spur/brand spur gear are you running?
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Old 09-13-2007, 06:49 PM   #3364
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looking for suggestions on a spur and pinion for stock asphalt racing here in Florida, extremely technical track, the straightaway is maybe 25-30 feet and there is only 1. For my T2 not a 007. I'm looking not to thermal, it will be my first time racing so I'm really just learning to drive more than trying to win.
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Old 09-14-2007, 01:43 AM   #3365
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Originally Posted by racer34v View Post
hardend steel, usually something like 8620 alloy
Thanks for that. Found a great website with all the specs I needed.

jsl6v8:
I've raced pretty open and tight tracks with a FDR of about 6 to maybe 6.5 max. I'd suggest going maybe a little higher if you're after less speed. Between 6.5 and 7?

FDR = (internal ratio) * (no. of teeth on spur) / (no. of teeth on pinion)

T2 internal ratio = 1.7
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Old 09-14-2007, 05:18 AM   #3366
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Thanks A.D.D
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Old 09-14-2007, 07:13 AM   #3367
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ok I'm looking at a final drive ratio of 6.4 for my T2, pretty dern technical course for my stock motor so 1.7 * spur/pinion= 6.4 now my question is does the combination of spur and pinion make a difference? is it the Gear ratio itself that causes motors and ESC to overheat and thermal or is it to large of a spur on to small of a pinion kind of thing?

Also I don't know if anyone does this but I have a bunch of 1.5mm shims that I would trade for .75mm or .4mm shims Also I have a left and right 6 degree C hub I would trade for 4s and a bunch of lower suspension holders top(+.75) and bottom dot(-.75), not middles that I would trade for more middle dotted ones. Not sure that anyone uses these even but I figured if someone did might as well get me some more spares of the stuff I use.

Last edited by jsl6v8; 09-14-2007 at 12:20 PM.
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Old 09-15-2007, 05:33 PM   #3368
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Default steering servo torque

Leaving 1/12, moving to 1/10 sedan. LHS has ordered an xray t2 007 (US), and i will need a new steering servo. speed is important, the faster the better, but what about the torque? what is the minimum number of ounces of torque required for this car?
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Old 09-15-2007, 07:03 PM   #3369
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the ideal is 100oz in at .10 but everyseems to go with the low-profiel 9550
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Old 09-15-2007, 09:18 PM   #3370
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KO 2413 here....works like a dream!
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Old 09-17-2007, 04:29 AM   #3371
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Quote:
Originally Posted by jsl6v8 View Post
ok I'm looking at a final drive ratio of 6.4 for my T2, pretty dern technical course for my stock motor so 1.7 * spur/pinion= 6.4 now my question is does the combination of spur and pinion make a difference? is it the Gear ratio itself that causes motors and ESC to overheat and thermal or is it to large of a spur on to small of a pinion kind of thing?
It's just a too lower gear ratio that'll cause overheating. As long as you find the right spur/pinion combo you'll be fine. I think the max sized 48 pitch spur you can stick in a '007 is 87... not sure about the T2 though.

If you're after getting the last millisecond out of laptimes, use smaller spurs and pinions for less rotational intertia. But to be honest, the difference in size is pretty insignificant. The main difference will be due to the motor being positioned more to the front or back.

Check the inside back cover of your manual/set-up book for a whole range of combos to arrive at the ratio you're after.
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Old 09-17-2007, 05:10 AM   #3372
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figured it out yesterday I'm going to go with a 22/84 but I'll get a 21-23 just in case I don't like the 22. Also anyone able to find a good picture of a brushed motor on the GTB, I can't seem to find a good picture that shows me what I'm suppose to do to this thing as far as wiring it.
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Old 09-17-2007, 08:10 AM   #3373
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Hey guys, I have never owned a xray before and wanted to know a few things. It's a T2 (not a 007) has the original chassis but I did chance the top plate out for the thick one that has no reliefs in it and put in the posts that are to stiffen it up. What I wanted to know is with all those screws in it is really prone to tweak in the event it makes hard contact with something. Dont really know, figured someone in this thread would have some insight on it.

Thanks,
Heath
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Old 09-17-2007, 09:49 AM   #3374
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Guys, which stores have the BEST price on the T2 '007 's ? (rubber or foam) ...

thanks,

Pat
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Old 09-17-2007, 10:08 AM   #3375
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There is a nib rubber tire version on fleabay for 379.00 with free shipping.
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