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Old 05-09-2006, 11:44 PM   #1
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Angry Tweak!

For the life of me I cannot get tweak out of my newly built car. I have gone through the shocks, suspension, connected the sway bars, disconnected the sway bars, loosened the upper deck, loosened the front and rear bulkheads, etc. Most of the time it is off between 1-1.5 mm on the Hudy Tweak Board. I was able to even it out but the preload on the spring perches were definatley noticable.

This is frustrating. This is my first attempt at a perfectly built kit (binding, reaming arms, caliper, matched shocks, etc.) yet I cannot get this right. Should I just disregard this setting? It seems one more thing to worry about and I just want to race.
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Old 05-10-2006, 01:02 AM   #2
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See if this helps:

Adjust Chassis Tweak
http://www.rc411.com/pages/howto.php?howto=2&page=1

How To Improve Acceleration
http://www.rc-car.com/detail.asp?id=188

How to: Set up and tweak your chassis
http://www.findarticles.com/p/articl...10/ai_n8916653
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Old 05-10-2006, 01:19 AM   #3
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Quote:
Originally Posted by performula
For the life of me I cannot get tweak out of my newly built car. I have gone through the shocks, suspension, connected the sway bars, disconnected the sway bars, loosened the upper deck, loosened the front and rear bulkheads, etc. Most of the time it is off between 1-1.5 mm on the Hudy Tweak Board. I was able to even it out but the preload on the spring perches were definatley noticable.

This is frustrating. This is my first attempt at a perfectly built kit (binding, reaming arms, caliper, matched shocks, etc.) yet I cannot get this right. Should I just disregard this setting? It seems one more thing to worry about and I just want to race.
How is the Chassis ? I know you are building a new car but the way you describe the problem is leaning towards a bent chassis. also check the length of the shocks shafts just a though
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Old 05-10-2006, 05:16 AM   #4
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Are the tires the same size? Are the screws thru the shock tower in the same hole on both sides?
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Old 05-10-2006, 06:24 AM   #5
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use the sway bar in the rear and cam for the front to get the car in tweak while the shocks are equal. It sounds like you are figting a rear sway bar issue.
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Old 05-10-2006, 07:45 AM   #6
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Hey how much did that Tweak board cost you for the hudy? I want to know so I can get an idea how much more the 8th onroad vs would be.
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Old 05-10-2006, 07:53 AM   #7
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It's quite common that the springs you use aren't the same as they should be.
like having the same color, but if you check them you can find out that one of the two is softer/harder....
unfortunatly this is very common..
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Old 05-10-2006, 09:59 AM   #8
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The chassis rocks a tad. I'm sending it back to the manufacturer.
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Old 05-10-2006, 11:30 AM   #9
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are you running foams or rubber tires?
the reason i ask is because foam tires wear down drastically compared to rubber tires. say you have a high bite left track (i.e. 2 sweepers to the right will do this), after a five minute run, your tire diameter from left to right is already different hence making your car tweaked.

i know you have a brand new car and you've never run it but i guess what i'm trying to say is that you will not have a perfectly tweaked nitro car running on foam tires. maybe the first 5 laps then after that the tires are different sizes already and you will have to retweak it again after that. the exception of course will be a track with no or very very minimal tire wear.

to me i just make sure my car is balanced from left to right as far as weight and off course shock length, etc. once in a while i throw it on the tweak board to check but i'm not too worried about it when it's off a little bit as it will be off anyways after 2 five minute runs....

now with rubber tires, it's a different story...

just a thought.
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Old 05-10-2006, 02:14 PM   #10
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what I find is much more important is to have the front equal in weight from left to right when you lift each tire. This is like the way I used to set my car up for oval.
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