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Old 02-08-2004, 11:37 AM   #6691
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Originally posted by Matt Howard
You might as well have weighed your car with rims on it then LOL throw some rubbers on there and weigh it for us
I dont have a scale, I only checked the weight there just to see what it would be, never really worry about it at the tracks down here...
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Old 02-08-2004, 03:06 PM   #6692
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Originally posted by DOTMAN
I use mineral spirits (You can get a gallon for a few bucks) and I've never had a problem either
Cheers
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Old 02-08-2004, 03:08 PM   #6693
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Originally posted by Lonestar
I'm currently cleaning new bearings with mine, right now... yes it does work, but it doesnt do any miracles. The vibrations are anything but "ultrasonic", I'd say under 100Hz. if you have carpet dust IN the bearings, it will not remove it. As I said, it does "clean" but nothing "fabulous". No magic!

I use either thinner or substitutes, or 90deg alcohol to clean stuff. the plastic doesn't melt.

Still a nice gizmo to clean metal parts, like 8th scale axles, or similar stuff.

Later,
Paul
Sounds well worth the money - I'm gonna get one soon!
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Old 02-08-2004, 03:19 PM   #6694
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Originally posted by AWOLsoldier
Hmm, i'll try this today... seeing how i've got nothing better to do.
AWOLsoldier:

So....how did it go with the bearing polishing? Did you notice an improvement?
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Old 02-08-2004, 03:31 PM   #6695
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Originally posted by Horatio
AWOLsoldier:

So....how did it go with the bearing polishing? Did you notice an improvement?
I didn't really see a vast improvement. I'd say it's not worth the effort.
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Old 02-08-2004, 03:34 PM   #6696
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Default 2.5 internal ratio

Just as an exapmle, running a 28 tooth pinion on kit spur and internal ratio (2.353) produces overall ratio of 1:5.8825

Doing the same thing on 2.5 conversion produces an overall ratio of 1:6.2500 - the equivalent of going down 2 teeth on the pinion using the kit set-up to 1:6.34.

I can't see how it would be better? - just different ie slightly lower overall ratio.

Perhaps the motor was cooler because the brushes had bedded in better - or because the overall ratio attained was better suited for that particular motor/track. I'd like to know how the same car/motor/cells/speedo/driver/track would do if used on the stock 2.353 but with a pinion 2 teeth smaller............my bet is that there would be no difference. Only the pain in the wallet
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Old 02-08-2004, 03:38 PM   #6697
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Horatio, we're talking for the SAME overall ratio. MO did say he used his usual overall ratio.
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Old 02-08-2004, 03:41 PM   #6698
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Quote:
Originally posted by AWOLsoldier
I didn't really see a vast improvement. I'd say it's not worth the effort.
But you did see some improvement....

Maybe if you race 27t stock - every bit helps. Thanks for letting us know.

I've got to prep my son's TC3 this week - he's leading the Junior stock championship and is in the running for winning a RC10 B4 (yeh, I know its not a Yok - but still!! ) so long as he keeps his points advantage. Perhaps freeing up his bearings just might clinch it for him. Fingers crossed!
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Old 02-08-2004, 03:47 PM   #6699
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Originally posted by Cobra81li200
Horatio, we're talking for the SAME overall ratio. MO did say he used his usual overall ratio.
Well it just doesn't add up then does it? It can't be anything to do with the internal ratio. There must be some other factor - perhaps the gears are more precisely manufactured with the 2.5 conversion?

If someone can explain why it's better, I'd be happy to listen. Until then, I don't believe it.
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Old 02-08-2004, 03:58 PM   #6700
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Quote:
Originally posted by Horatio
Well it just doesn't add up then does it? It can't be anything to do with the internal ratio. There must be some other factor - perhaps the gears are more precisely manufactured with the 2.5 conversion?

If someone can explain why it's better, I'd be happy to listen. Until then, I don't believe it.
Neither do I ! For me there is nothing better, even the energy required to make the car go at the same speed is higher. Needless to say the weight of the alloy gears is higher...
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Old 02-08-2004, 04:03 PM   #6701
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Originally posted by Cobra81li200
Neither do I ! For me there is nothing better, even the energy required to make the car go at the same speed is higher. Needless to say the weight of the alloy gears is higher...
Valid points. Maybe we'll never know why it's 'better'....
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Old 02-08-2004, 04:54 PM   #6702
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You guys are over analizing everything! Theories, numbers and what it's "supposed to do" don't mean anything compared to track testing. I ran the car with both a 10x1 and a stock motor. I haven't run stock in a really long time so it all feels slow to me. I had another guy at the track, that runs a Yokomo in stock all the time, put his motor and batteries in my car with as close to the same overall gear ratio as we could get. He said it was a little punchier and the motor was cooler to the touch.

I don't care what theories you can quote, track testing tells me it's good.
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Old 02-08-2004, 08:25 PM   #6703
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that's where it counts

does it shows significant or unusual wear on the gears?
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Old 02-08-2004, 08:42 PM   #6704
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Originally posted by mo
I don't care what theories you can quote, track testing tells me it's good.
Amen Mo.
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Old 02-08-2004, 08:51 PM   #6705
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I've only run the car 1 race day so there isn't any wear.
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