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Old 02-17-2003, 10:15 PM   #6211
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Default 24T conversion ?!

Hi guys, could you explain in more detail about what do you mean by 24 T conversion ? what 's the benefit and which pully(s) are you talking here ?, is this for v onerr or the regular voner , i own a v one r w/ diffs setup. Also, how do you change pinion gears? and correct me if i am wrong, does kyosho even makes 15t/19T pinions ? thanks for the help..
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Old 02-17-2003, 10:48 PM   #6212
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i need new avator someone give me some?
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Old 02-18-2003, 12:15 AM   #6213
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Default Re: 24T Conversion

Quote:
Originally posted by Bounty Hunter
Basically the 24T conversion adds 5 tooth rollout to the internal drive train ratio (not sure what it is after the conversion). So on tracks that have a ling straightaway like 180+ ft, you dont have gear up massively to keep from winding your motor out. Of course this also depends on what motor you are running and how you are running it (i.e. Tune setup). I personally am running the 24T conversion with a 15/49 1st gear and 19/45 2nd gear at Revelation here in Southern CA. I was told that the internal ratio was like 2:1 but I am not sure. So the extra 5 tooth rollout is the reason why your top end looks easier to attain.
So...the overdrive is the way to go??
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Old 02-18-2003, 01:11 AM   #6214
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Default Re: 24T conversion ?!

Quote:
Originally posted by Tag
Hi guys, could you explain in more detail about what do you mean by 24 T conversion ? what 's the benefit and which pully(s) are you talking here ?, is this for v onerr or the regular voner , i own a v one r w/ diffs setup. Also, how do you change pinion gears? and correct me if i am wrong, does kyosho even makes 15t/19T pinions ? thanks for the help..
Well in a nut shell your two drive pulleys on your 2speed shaft in the rear of the car are 19T out of the kit. By removing these two pulleys that distribute power to both the front and rear via side and rear belts and replacing them with a larger 24T pulleys you increase the internal drive line ratio and add 5 teeth to the total rollout of your car. This is one solution to VoneR's and RR's that run a little short on the gearing at large tracks such as Revelation (100ft X 200ft). This also helps prevent your motor from winding out before you reach the end of the straightaway. Now the 15/19 tooth pinions and 45/49 tooth spurs were an attempt to gear down a bit so that I dont completly lose acceleration in the infield. As far as the pinions well the RR team setup sheet includes ratios for 15 and 19 tooth pinons, however I think they are only available in Japan or Hong Kong, I have not found them. However I used Yokomo GT-4 pinions. The 19T was a direct fit on the 3D clutch bell. However, the teeth on the 15T was a little too long. I had to file down each tooth with approximately 1mm flat on the top of the tooth so that the kyosho spurs would mesh correctly with them. I have been running this setup for almost a month now and they seem to be holding up just fine.
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Old 02-18-2003, 01:18 AM   #6215
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Default Re: Re: 24T Conversion

Quote:
Originally posted by rbgti
So...the overdrive is the way to go??
Well overdrive is something different. The 24T conversion adds rollout to your overall internal driveline ratio. Overdrive is when you have the front tires spinning faster that your rears to basically add some benefits of a pull action front wheel drive but still have traction of 4 wheel drive. Kyoshos overdrive with a 25T front pulley is approximately 5% when you have a rear tire diameter of 64mm and a front diameter of 60mm. With a 4mm split like that the fronts will outspin your rears by 5% and get more steering as they are so small. Kyosho's design in the V One RR basically puts more and more overdirve in the car you diameter split gets closer and closer (or your rears get smaller). Now with the 27T front pulley you get an even distribution so you want the front and rear tires the same diameter. The only problem there lies within the fact that your rear tires wear faster than your fronts. So with this situation as your rears wear down, the rear tires will spin faster and you get the reverse effect.
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Old 02-18-2003, 02:01 AM   #6216
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Default Gearing

Quote:
Originally posted by modellor
If you change to from 48T/44T spurs to 49T/45T spurs you will gain more acceleration and less top speed if you keep the same pinions
So...if i maintain 15T/19T pinion and adopt 49T/44T, does this mean i will gain more acceleration (15T/49T-1st gear) while maintaining same top speed (19T/44T-2nd gear)?
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Old 02-18-2003, 02:38 AM   #6217
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Default Re: Re: 24T conversion ?!

Quote:
Originally posted by Bounty Hunter
Well in a nut shell your two drive pulleys on your 2speed shaft in the rear of the car are 19T out of the kit. By removing these two pulleys that distribute power to both the front and rear via side and rear belts and replacing them with a larger 24T pulleys you increase the internal drive line ratio and add 5 teeth to the total rollout of your car. This is one solution to VoneR's and RR's that run a little short on the gearing at large tracks such as Revelation (100ft X 200ft). This also helps prevent your motor from winding out before you reach the end of the straightaway. Now the 15/19 tooth pinions and 45/49 tooth spurs were an attempt to gear down a bit so that I dont completly lose acceleration in the infield. As far as the pinions well the RR team setup sheet includes ratios for 15 and 19 tooth pinons, however I think they are only available in Japan or Hong Kong, I have not found them. However I used Yokomo GT-4 pinions. The 19T was a direct fit on the 3D clutch bell. However, the teeth on the 15T was a little too long. I had to file down each tooth with approximately 1mm flat on the top of the tooth so that the kyosho spurs would mesh correctly with them. I have been running this setup for almost a month now and they seem to be holding up just fine.
Nice explanation
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Old 02-18-2003, 02:45 AM   #6218
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Default Re: Gearing

Quote:
Originally posted by Advanti
So...if i maintain 15T/19T pinion and adopt 49T/44T, does this mean i will gain more acceleration (15T/49T-1st gear) while maintaining same top speed (19T/44T-2nd gear)?
Theoretically yes... But it depends on how your engine is tuned and how the 2 speed is set.

With the high tooth split, you need to set the 2nd speed to engage later (tighten the spring) to get into the right powerband of the engine so that the engine does not bog down when it changes to 2nd gear.

Depending on your track, you may experience that it'll be a little annoying that your engine screams and that your 2nd gear does not enggage in the infields because the infields stretch may not be long enough to allow the 2nd speed to engage. Your mileage may vary.
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Old 02-18-2003, 09:08 AM   #6219
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Initail D and yourself are correct. The bigger split is more suited to tracks with longish straights with hairpin or tight slow corners where the extra acceleration will be required.
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Old 02-18-2003, 09:17 AM   #6220
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Default Re: Re: 24T conversion ?!

Quote:
Originally posted by Bounty Hunter
As far as the pinions well the RR team setup sheet includes ratios for 15 and 19 tooth pinons, however I think they are only available in Japan or Hong Kong, I have not found them.
15 Tooth FM356-15L

19 Tooth FM357-19H
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Old 02-18-2003, 11:22 AM   #6221
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does the rr come with universals or dog bones?
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Old 02-18-2003, 11:45 AM   #6222
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Quote:
Originally posted by nova racer
does the rr come with universals or dog bones?
Dog Bones
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Old 02-18-2003, 01:23 PM   #6223
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Default Re: Re: Re: 24T Conversion

Quote:
Originally posted by Bounty Hunter
Well overdrive is something different. The 24T conversion adds rollout to your overall internal driveline ratio. Overdrive is when you have the front tires spinning faster that your rears to basically add some benefits of a pull action front wheel drive but still have traction of 4 wheel drive. Kyoshos overdrive with a 25T front pulley is approximately 5% when you have a rear tire diameter of 64mm and a front diameter of 60mm. With a 4mm split like that the fronts will outspin your rears by 5% and get more steering as they are so small. Kyosho's design in the V One RR basically puts more and more overdirve in the car you diameter split gets closer and closer (or your rears get smaller). Now with the 27T front pulley you get an even distribution so you want the front and rear tires the same diameter. The only problem there lies within the fact that your rear tires wear faster than your fronts. So with this situation as your rears wear down, the rear tires will spin faster and you get the reverse effect.
Oh I see now.... My impression of the 24t conversion was that it creates an overdrive condition as well as an increased rollout. So now what you are saying is that with the 24t conversion, front and rear drive are the same (no bias)? So I guess it is not really necessary to run a 3-4 mm gap between the tires.

Thanks
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Old 02-18-2003, 02:43 PM   #6224
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Default Re: Re: Re: Re: 24T Conversion

Quote:
Originally posted by rbgti
Oh I see now.... My impression of the 24t conversion was that it creates an overdrive condition as well as an increased rollout. So now what you are saying is that with the 24t conversion, front and rear drive are the same (no bias)? So I guess it is not really necessary to run a 3-4 mm gap between the tires.

Thanks
Actually the 24T conversion and Overdrive are two seperate options. If you want to do the 24T conversion you replace your two 19T drive pulleys in the rear. If you want Overdrive you go from the 27T front pulley to the 25T front pulley that comes with the RR. You would have to do all three gears to get the additional rollout and overdrive at the same time.
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Old 02-18-2003, 03:08 PM   #6225
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Quote:
The only problem there lies within the fact that your rear tires wear faster than your fronts. So with this situation as your rears wear down, the rear tires will spin faster and you get the reverse effect.
Isn't it the other way around?

The smaller the rear tires get, the more front overdrive?
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