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Old 10-12-2007, 02:35 PM   #1021
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We had a broken kingpin tonight, but it was a big hit at the end of the straight.
"Big hit" is an understatement.
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Old 10-12-2007, 04:29 PM   #1022
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"Big hit" is an understatement.
your suposed to stay between the boards not on the boards..lol
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Old 10-13-2007, 09:23 AM   #1023
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Which type of bumber do you guys like? I see the foam one by Slapmaster and the Kydex one by CRC.

Thanks for any help.

-Steve
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Old 10-13-2007, 09:41 AM   #1024
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I prefer the foam ones like the Slapmaster, Parma, etc. The Kydex certainly protects but it aborbs little or none of the impact, transmitting it directly to the screws. In a big hit (and, admittedly, BIG hits) I've seen the kydex bumper lever the screws through the chassis. The foam bumpers absorb impacts, though a BIG impact could still bring the chassis plate into contact with a barrier, etc and cause chipping or some such. Chipping doesn't usually impact utility of the chassis like screws pulled through does.

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Old 10-13-2007, 01:05 PM   #1025
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i like the Slapmaster bumper,works great.
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Old 10-17-2007, 04:26 PM   #1026
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I prefer the foam ones like the Slapmaster, Parma, etc. The Kydex certainly protects but it aborbs little or none of the impact, transmitting it directly to the screws. In a big hit (and, admittedly, BIG hits) I've seen the kydex bumper lever the screws through the chassis. The foam bumpers absorb impacts, though a BIG impact could still bring the chassis plate into contact with a barrier, etc and cause chipping or some such. Chipping doesn't usually impact utility of the chassis like screws pulled through does.

Scottrik
..Thanks guys. I went with the one from Slapmaster.

Also, I'm running IB4200's. Is there a trick to getting those into the battery tray without disassemblying anything? The picture on the CRC website shows it fitting without a jumper wire. I'm thinking I may have to split the pack and run a jumper wire.

Last, is there a site that explains what rollout is and how we calculate it for 12th scale cars?

Thanks a million for everyones help!

-Steve
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Old 10-17-2007, 05:11 PM   #1027
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bsmooth: you gotta pop the shock...

Rollout is the distance the car moves with one rotation of the motor.

Rollout = (pinion/spur)*pi*tire diameter

The attached excel file works for brushed motors. We print them out on 11x17paper and get them laminated. Works great.

James
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File Type: zip rollout.zip (78.3 KB, 69 views)
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Old 10-17-2007, 05:30 PM   #1028
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could you update the rollout to go up to 47 tooth pinion and include a 74,76,78 spur.

I have a 17.5 and would to know the rollout without having to calculate. thanks
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Old 10-17-2007, 06:06 PM   #1029
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cookie1: attached is the brushless edition you asked for...
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File Type: zip rollout_bl.zip (77.9 KB, 65 views)
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Old 10-17-2007, 06:31 PM   #1030
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Quote:
Originally Posted by Yankey View Post
bsmooth: you gotta pop the shock...

Rollout is the distance the car moves with one rotation of the motor.

Rollout = (pinion/spur)*pi*tire diameter

The attached excel file works for brushed motors. We print them out on 11x17paper and get them laminated. Works great.

James
Thanks for the chart James. If I have to pop the shock everytime, will it wear the ball end out? Also, is there a special tool to pop it off?

Thanks again,
Steve
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Old 10-17-2007, 06:59 PM   #1031
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yes it will wear. I usually add a o-ring or cut a small pcs. of fuel line to take up slop. Yes there is a very special tool I use. Needlenosie pliers.

Yankee- you are very smart. Where do you race?

Thanks for gear chart!!
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Old 10-17-2007, 07:04 PM   #1032
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Yep. Needlenose. Just be careful not to bend the end of the shock body. Use the o-rings and replace the cup every once in awhile. You can do this too: http://www.teamcrc.com/crc/modules.p...ewtopic&t=1747

Cookie, I race in West Michigan. You?
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Old 10-17-2007, 07:20 PM   #1033
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OR...follow Mark Payne's excellent advise on his blog and use the X-ray ball and eyelet. That way you use an allen wrench instead of needlenose.
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Old 10-17-2007, 07:44 PM   #1034
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I race at the Gate in Cleveland. You coming to the classic?
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Old 10-18-2007, 04:41 AM   #1035
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Quote:
Originally Posted by bsmooth
Also, I'm running IB4200's. Is there a trick to getting those into the battery tray without disassemblying anything?
yes as people have said you could use Mark paynes Xray ball ends, or another idea i posted on CRC`s forum is a knurled height adjuster used for adjusting the height of the sticks on a Futaba radio. see attached pics.
http://i24.photobucket.com/albums/c2...Picture024.jpg
http://i24.photobucket.com/albums/c2...Picture014.jpg
http://i24.photobucket.com/albums/c2...Picture015.jpg
HTH

ah, i just see some one linked it,cheers Yankey.

Last edited by jbsmith1; 10-18-2007 at 04:58 AM. Reason: missed Yankee`s link
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