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Old 02-03-2009, 07:38 PM   #1
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Default tweak chassis

is there anyway to fix a tweaked chassis? or just throw it away
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Old 02-03-2009, 07:57 PM   #2
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Depends on what kinda material, age, and how bad a hit (or hits) it took.

Aluminum chassis are difficult if not almost impossible to untweak. Fiberglass will develop microscopic cracks and weaken over time. A carbon fiber chassis has the best chance of being untweaked. The entire chassis would need to be completely disassembled, laid between two smooth flat surfaces, then weighted down for a couple of days.

Of course even a carbon fiber chassis will not last forever. It does have a memory of sorts, so it can be untweaked. The carbon fiber chassis can also develop microscopic cracks, but over a much, much longer time frame than fiberglass.

A fellow racer had the same 1/12 scale for about 6 years, and started to struggle with setup and performance. His vehicle was well maintained, and properly assembled. Finally he built a new car from the ground up and is doing much better. It was theorized the carbon fiber chassis parts were weakened over time. Causing the handling issues. Hope this helps.
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Old 02-04-2009, 05:03 AM   #3
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Quote:
Originally Posted by SpraydbySprague View Post
Depends on what kinda material, age, and how bad a hit (or hits) it took.

Aluminum chassis are difficult if not almost impossible to untweak. Fiberglass will develop microscopic cracks and weaken over time. A carbon fiber chassis has the best chance of being untweaked. The entire chassis would need to be completely disassembled, laid between two smooth flat surfaces, then weighted down for a couple of days.


Of course even a carbon fiber chassis will not last forever. It does have a memory of sorts, so it can be untweaked. The carbon fiber chassis can also develop microscopic cracks, but over a much, much longer time frame than fiberglass.

A fellow racer had the same 1/12 scale for about 6 years, and started to struggle with setup and performance. His vehicle was well maintained, and properly assembled. Finally he built a new car from the ground up and is doing much better. It was theorized the carbon fiber chassis parts were weakened over time. Causing the handling issues. Hope this helps.
Yes, it helped alot. I have a CF chassis and do what you said.
Thanks.
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Old 02-04-2009, 04:05 PM   #4
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You're welcome.
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Old 02-04-2009, 06:13 PM   #5
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If you are running a twin deck Carbon Fibre chassis, you could try this:

Remove the wheels and lay the car flat on a set up board.
Loosen the top deck screws and push the car flat.
Whilst holding the car flat, retighten the screws in the correct order (if it is badly tweaked you may need another set of hands to hold it down whilst you tighten).

You should then check regulalrly during the day, particularly after any heavy impacts - front on's seem to be the worst
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Old 02-04-2009, 08:49 PM   #6
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I found out what is tweaking my car, it's not my chassis but the bulkhead. One thing I'm not sure is I'm still using a plastic bulkhead, here is the thing; whenever I would tighten the 4 screws (x wise) chassis would tweak, but when I loosened the other two or take it out there would still be some but minimal.I would try running my car with just two screws, just hope it would not mess up my cars handling.
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