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Rollout Calculation tool

Rollout Calculation tool

Old 01-04-2007, 10:33 AM
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Default Rollout Calculation tool


do people care about the rollout for a 1/18 like we all do for 1/10 onroad with the big formula that I don't since it's a program that we use at the track.

why I'm asking this question? well at the last ECC I burn 2 motors and all my motor was pretty hot even with a small fan or a motor head sink.

it's not normal and I did not really pay attention since that weekend.

yesterday I was at the track with my m18 and I had a team scream 17T and again the motor was extremely hight and I knew that my rollout / gearing was wrong since I was getting my top speed in the middle of the straight.

anyway, do you use a rollout calc or you just try different gearing
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Old 01-15-2007, 12:14 PM
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rollout really is used for foam tires.
but if you go to gearchart.com they have a great grear chart calculator, wich will allow for roll out, or rubber tire applications !
or you can make you own chart to you cars own gearing raitos!
my self i use a gear chart and a temp gun, because all tracks are diffrent thats where the temp gun helps, i try not to let my motors get hotter the 160f -175f which is hot!
i normally shoot for about 110f - 140 range!
the trick is to ballance the power, not all top end and not all puch and revs!
have fun!

i hope this info helps!
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Old 01-16-2007, 10:09 PM
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Rollout isn't used commonly in 1/18. This is a beautiful thing. 1/18 is about simplicity. Find the right gearing and leave it alone. Foam tires will get smaller but the change in circumfrence doesn't affect performance enough. Tires will usually be chunked apart too much before their size becomes a concern or the fronts shrinking will cause the car to start to push. Thats when you want to replace your rubber.
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Old 01-17-2007, 10:50 PM
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lol when you start loseing laps get new tires or gear up it help more then you know.
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