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Post by geekmedic on Dec 17, 2007 7:09:11 GMT -6
Just how far do you shave the wheels? It looks like the shaver will take the wheels down to an even flat surface, is that the goal, (PWD)?
Our rules state that a light sanding to remove the mold mark is acceptable. I'm just wondering how far I should work the wheels. I have already done some shaving and have gotten the major high spots off of the wheels, but I can still see that the wheels are slightly cupped. Should I leave them here, or take more out. The mold mark is still visible but does not create any rub, no longer the high spot.
Sorry if these questions seem lame or dumb, just want to get my boy the most speed, be within rules, and I could not find the answers by watching the videos or searching.
My next series of questions will be about simple easy (probably already have) polishing media to use with the pro wheel mandrel.
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Post by RacerX on Dec 17, 2007 8:54:43 GMT -6
You want to shave the wheel just until the imperfections are gone on the worst wheel in your set. The goal is to leave it the largest diameter possible yet a perfect circle. If you are measuring, this will land somewhere around 1.170" give or take a little.
I hope this helps.
Racer X
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Post by Derby Worx Pro Team on Dec 17, 2007 9:04:38 GMT -6
+1.17 diameter will get you where you want to be with removal of the mold mark. The first time I shaved my first set of wheels, I found that if you keep going with light shavings the you will eventually remove the mold mark completely.
If you want to put the concave back in the wheel, use a piece of the micromesh sandpaper on a rounded object like a wood dowel and hold it steady against the wheel spinning slowly in a drill.
Second part of your post....
The plastic polish that many of the online retailers carry works rather well when polishing with a piece of flannel or lint free cloth.
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Post by geekmedic on Dec 17, 2007 12:46:10 GMT -6
So I'm gonna keep going to get the mold mark off completly.
What should I avoid as far as wheel treatment.
I was also thinking that when I polish the wheels that my cordless (B&D 6v) screw driver with a hand chuck and wheel mandrel would be slow enough to not melt the wheel. Thoughts
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Post by Derby Worx Pro Team on Dec 17, 2007 13:14:15 GMT -6
So I'm gonna keep going to get the mold mark off completly. What should I avoid as far as wheel treatment. I was also thinking that when I polish the wheels that my cordless (B&D 6v) screw driver with a hand chuck and wheel mandrel would be slow enough to not melt the wheel. Thoughts Avoid too much Pressure and Heat Build-up with the polishing. Keep the polishing cloth damp and clean by using a new piece with each wheel. |
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wedge
Pine Head
Posts: 32
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Post by wedge on Dec 17, 2007 15:40:51 GMT -6
I have found that using standard automotive rubbing compound with a soft cloth works great for final polish.
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Post by Bigtex on Dec 19, 2007 21:08:29 GMT -6
Geekmedic,
You indicated that you were allowed to lightly sand the wheel to remove the mold mark. Just wondering if you may get dinged for actually shaving the wheel...some rules would consider this as "rounding" and I've seen some allow it and others not....just be sure to get clarification. I would hate for anyone to show up at a race and get disqualified....
Cheers...
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Post by DerbyDoc.com on Dec 19, 2007 21:58:02 GMT -6
Geekmedic, You indicated that you were allowed to lightly sand the wheel to remove the mold mark. Just wondering if you may get dinged for actually shaving the wheel...some rules would consider this as "rounding" and I've seen some allow it and others not....just be sure to get clarification. I would hate for anyone to show up at a race and get disqualified.... Cheers... Big Tex, I think I saw your name come up on another forum a few months back. Welcome to the Derbyworx board. I would like to invite you to join in at WIRL in 2008. Just check out wirlracing.com for details. 2 years ago, I was a big fish in a small pond and WIRL helped me to get faster by trying new things. Good luck, Tory J PS- Log in on the wirl home page saturday night to watch the live feed, |
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Post by Go Bubba Go on Dec 20, 2007 11:09:44 GMT -6
Geekmedic, You indicated that you were allowed to lightly sand the wheel to remove the mold mark. Just wondering if you may get dinged for actually shaving the wheel...some rules would consider this as "rounding" and I've seen some allow it and others not....just be sure to get clarification. I would hate for anyone to show up at a race and get disqualified.... Cheers... bigtex has a good point. A lot of the "lightly sand" type rules have a specific prohibition against shaving. In the case of our Council rules it is worded pretty clearly i.e. " Wheels may not be shaved". Bubba |
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Post by sporty on Dec 30, 2007 15:55:44 GMT -6
That is certainly a real valid topic !! How does one determine what is shaved and what was sanded lightly to remove the mold mark ? do they look differently ? the process is basically doing the same thing, just worded differently. Our district rules, say that the front nose of the car, must rest against the start peg ! Yet if you remove the front and add a paper clip and some tape to creat a front end. Then you have this also debate, what is the front end of the car ? Since our district rules say the car most be wood. Then a metal or non wood item creating the nose of the front of a pine wood derby car. Then is this not considered illegal ? Ahh, The dabate that it can create ! Interpretation of the rules ! dictionary term of sanded - www.m-w.com/dictionary/sanded3 : to smooth or dress by grinding or rubbing with an abrasive (as sandpaper) shaved- www.m-w.com/dictionary/shaved1 a: to remove a thin layer from b: to cut off in thin layers or shreds : slice c: to cut off closely or 4: to come close to or touch lightly in passing. the meanings so closely relate to one another !! Sporty |
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