Originally Posted by
Mera'din
Here is a question for those of you with stock steering setups and modified (2012 style) setups.
How are your steering endpoints set? For example, I messed around with my servo position, subtrim, endpoints, etc... but I cannot get an even throw side to side. I have to have a huge endpoint spred. Somewhere along the lines of 20 points.
I am not the only one at our track to notice this. A very experienced racer test drove my car as he is looking to get an xray and he gave it back to me saying that the car doesn't steer the same right to left.
We put it up on the setup blocks as I though maybe something had shifted but both right and left said 32 degrees on my rack.
Even with the subtrim at zero, arm straight up and down, I still had about 15 points difference from right to left. This tells me, in my limited experience that it requires a longer travel one way to get the same end point.
This seems very odd to me as the rack is centered (verified) and we are going to the same degrees on the steering gauge both ways.
Where is this difference coming from? The 2012 suffers this as well. Do those of yu with stock setups have this trouble?
We looked at a fellow racers car and he has about 60 points of subtrim to get his arm straight up and down and the his endpoints are off about 30 points right to left as well. (80 one way and 110 the other)
Go back to basics, remove the servo saver and set the radio trim to centre and 100% throw, put the servo saver back on with the ball as near to 12 O'clock as poss, then set the l/r trim so that the ball is spot on. Measure your track rods and get them both exactly the same length. Connect the steering link and adjust that so that the wheels look straight. Steer right on the radio, adjust the servo end point so the servo just starts to hum, knock off 1%. Do the same on the left, both end points should be within a few%.
Put the car on the track and push the car forwards (no pinion on motor) with full steering right and note turning circle, do the same left, both should be about the same.
If they are not start to look for a machanical reason.
rear toe equal l/r.
front steering equal l/r
chamber and castor equal l/r
friction in l/r drive train, CVJ's, bearings, rubbing wheel.
With servo set top dead centre the should be equal steering and speed of steering, trims and end points are used to fine tune not to overcome car set up irregularities.
Once the car is equal in the "push test" connect the motor and try again, at slow speed it should give the same result, at high speed any noticable differences will be down to tweak, tyres or unequal balance somewhere.
Both my T3's are spot on.
Bb