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Post by rocketpine21 on Mar 7, 2010 14:49:51 GMT -6
Hey all
Our awana group has an old wooden 42 ft track that fits a little rough where the joints meet. Is the RR method effective on a track like this?
In the past we have won by setting up the cars as follows
Three wheelin, 5 oz, awana speed axles, awana speed wheels, com 3/4, krytox 100. I aligned each wheel using wax shims and the cars rolled pretty straight, maybe a small bit of straying. On the 42ft track our best time was 3.58 sec which was like 204mph scale speed I think. Is there any more room for speed gains? The competition is catching up.....
This year, I ran the same configurations except the following changes were made: 3 deg. neg cant drilled into the block using the probody tool with a 3/32 drill bit under one side for the angle, I bent the front DFW axle to get the steering into the rail which was approx. 2 1/2 inches in 6 ft. I did not align the back wheels with the shims ( I was advised that the tool would get it close enough).
THe result this year with the new modifications: 3.68 is the best time we got and the car was "tracking" back and forth about 4 times down the straightaway.
Q's.......? Did I not RR hard enough? I could see the block shifting on the rear wheels instead of staying put on the axles, so was the lack of rear alignment the problem? With RR, will my DFW catch a gap on the rough track seams and cause it to go crazy?
Thanks guys
Rocket pine
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Post by rpcarpe on Mar 7, 2010 15:02:06 GMT -6
Rocket Pine, Your car sounds like a good set-up. Did you determine a cause why the car was "tracking" back and forth? Was it caused by the rough joints on the track? IMHO, your RR is a little aggressive for a worn-out wooden track. When I test RR's on a bet up wooden track, the gentler steering cars did better. Perhaps 1" in 6ft? Always check your rear axles so that the wheels ride out from the body. Will you see this track again next year?
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Post by rocketpine21 on Mar 7, 2010 15:20:17 GMT -6
I could not tell during the race if the small gaps in the joints hurt the car. What I did for sure notice was the back of the car (right side) moving toward the track and then it would come right off the guide strip and begin the 4-5 doglegs or tracking the rest of the way. Wonder if my degree of cant in the rears was too much? I have been reading about using smaller degrees.....there was a mention of a credit card strip used to create the angle instead of the drill bit I used. I read where Warp recommended a 1 inch drift in 2 feet for RR. My problem is I cannot test my cars, so I have to wait each year and HOPE my set up is good which really stinks and stresses me out! Any ideas on how to make a practice lane in the basement? Plywood and a furring strip for the middle guide lane?
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