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Old 12-20-2006, 03:12 PM   #1
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Default Insert Theory, how hard?

I and my racing buddies have recently started glueing our own 8th scale buggy/truggy tires. We're trying to figure out what the difference in insert rigidity does to tire performance. We race on hard packed clay, that often blue grooves near the middle and end of each raceday(the rain has washed it clean each time). So what inserts should we use, hard, soft, medium? And will it matter how hard the tire compound itself is?

My theory was that you'd want soft tires with hard inserts to run on the hard packed clay. On the other hand, it's pretty bumpy and rough in places, would that mean we want to use a medium or soft insert instead? We've been doing the on road thing for years and it really took us about 6-8 months of experimenting to get the right combo. I was hoping you guys could help us get more of a jump on the competition...
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Old 12-20-2006, 03:18 PM   #2
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I'm just a noobie on this one so correct me if I'm wrong, but wouldn't you use medium for this kind of track?
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Old 12-20-2006, 04:03 PM   #3
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If you run on a track that is smooth and high grip, a stiffer foam might yield better lap times, tire wear, and a better feel to the car.

If the track is blown out rough, then a stiff foam would more than likley hurt lap times as it would make the car bounce around alot more. Don't confuse this with a loamy surface though.

The best thing to do is experiment, but to be honest, messing around with 1/8 scale foams is fruitless. Now 1/10 scale on the other hand, the type of foam you use is very important and can improve your lap times dramatically.
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Old 12-20-2006, 04:49 PM   #4
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Cool, thank you. I assumed it worked out alot like air in full scale tires.
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Old 12-20-2006, 07:48 PM   #5
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this is the track r40's talking about.........

http://www.youtube.com:80/watch?v=E_bIGwUYBYU
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