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Post by resophonic1 on Jan 23, 2010 13:58:53 GMT -7
We are able to use an extended wheel base for my sons pack car this year. I think we are going to try a 5" wheel base and have the rear tire as far back as possible. What do you think the maximum weight should be if we have a 3 wheel rail runner with a wedge body style. I've never tried anything over 3.5 ounces before. I looking for maximum fall time and horse power with this car as well as keep it stable. I will have some time the day before the race to fine tune it on a track.
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Post by Zeebzob on Jan 23, 2010 14:02:56 GMT -7
We are able to use an extended wheel base for my sons pack car this year. I think we are going to try a 5" wheel base and have the rear tire as far back as possible. What do you think the maximum weight should be if we have a 3 wheel rail runner with a wedge body style. I've never tried anything over 3.5 ounces before. I looking for maximum fall time and horse power with this car as well as keep it stable. I will have some time the day before the race to fine tune it on a track. Assuming the weight limit is the typical 5 oz., get it as close to 5 oz as you can.
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Post by ACME Racing on Jan 23, 2010 14:36:24 GMT -7
Your wheel base should be closer to 5.75 in addition to weighing 5oz. It sounds like you've been leaving 1.5 ounces of speed at home on your work bench.
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Post by W Racing on Jan 23, 2010 15:19:16 GMT -7
I think he means added weight...
Anything 3.5 or over is perfect...
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Post by ACME Racing on Jan 23, 2010 15:32:47 GMT -7
I'm sure your right W.
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Post by resophonic1 on Jan 23, 2010 18:31:07 GMT -7
I should have worded it better, added weight for sure. I was thinking about pushing it to 4 ounces. Just wondering about the stability of the car.
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Post by psycaz on Jan 23, 2010 18:45:59 GMT -7
Stability is going to tied more to weight placement and alignment than how much weight.
I think most here are shoting for between 5/8 (agressive) and 3/4 with an extended wheelbase. Some go WAY closer, some at 3/8. The farther back the weight, the more important alignment as wiggles come into play.
Hope that helps and was even the question you had. ;D
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Post by Wood Butcher Racing on Jan 30, 2010 6:05:53 GMT -7
The more ballast (horsepower) you have the better. Each car I have made I have made the bodies lighter, as well as playing with the design. Be careful on how you lighten the body because you don't want it to break on race day.
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