10-05-2009, 10:15 PM
Join Date: Feb 2009
Location: All over the place
Originally Posted by RossoTorro
I got a converted TA05-R to TA05 IFS-R.
It has lots of options...
53883 TA05 carbon steering link
53893 Lightweight carbon lower deck
53990 TA05 alu bulkhead
53994 TA05 IFS rear carbon damper stay
54019 TA05 IFS alu bulkhead
There are some more, can't remember them. Also the steering and rocker arms have bearings in them.
My problem is.... I tried the chassi on 4 seperate scales to weigh it in with lipo.
I then saw the difference in weight on each wheel. What puzzle me is the way it was distributed.
Front left was 370g
Rear right was 380g
Front right was 240g
Rear left was 250g
Why are the weight so unusual? Just to get a basis and that the place i measured was straight i also tested my TA04-R and that was 10g to 20g off on each corner.
My guess is the chassi has tweak in it, but it's brand new. I changed oil in dampers and put on new springs. No difference. I took the car apart to see and found nothing wrong.
Anyone have a clue?
Scales calibrated correctly and within tolerance of each other?
Try removing (disconnecting) the suspension (i.e. the shocks from the lower arms. That way, you will get only the contribution of weight in each scale reading (i.e. the springs will not transfer any load to the opposing corner - which is what they do).
Tweak on a brand new car is not inimaginable, but it is worth checking the chassis first with a straightedge if you have one. Start as above and work you way down from there.
If one corner is loaded more, then to achieve the same ground clearance you will need to put more load on the spring, thus transferring some of the weight to the opposite corner. If all the above tests are clear, then you need to re-distribute the weight around in your car.
One other way you can tackle this is to just balance the car on needlepoints (like the Hudy chassis balancing tools; you don't need to buy them, just make your own). That way weight transferred by spring load is taken out of the equation.
Team Greasy Weasel
The best upgrade to any car is some driver skill.
Last edited by niznai; 10-06-2009 at 02:20 AM.