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Over-rotating

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Lessen

Lessen

Super Awesome!
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Location
Aurora, Ohio (Cleveland)
RC Driving Style
  1. Racing
So I went to my first on-road carpet race last week and my cars pretty much sucked so I have a lot of work to do. The biggest problem I had with my "stockTC" is what I can best describe as over-rotating. The thing just doesn't want to stop turning. I know that sounds crazy that I wouldn't want my car to turn but I find it unpredictable. From experience with VRC I like my car to start pushing slightly when I get back to the throttle moderately and to break lose only upon nearly full throttle lateral acceleration. My first inclination is bad diff settings. When I did a thorough post-race inspection I found my R. diff to be at ~1 7/8 out from tight and the F.diff at ~ 2 5/8 out. Since I had them available for adjustment I went ahead and tightened both to 1 1/2 turn out.

Any thoughts?
 
Just basing my thoughts on some common sense, but the carpet racing would not give you the same handling as the VRC. It's a good possibility that different tire compounds would give you the handling you're used to, or looking for.
Maybe even different from front to rear. Just a thought.
 
Yes, you're absolutely right Ralph. Not everything I understand about setup will transfer because of the difference of surface. My baseline is last weekend so I obviously need to start from there. I'm thinking no matter what the grip level I need to the car to react in a manner that is comfortable for me. Now what adjustments I need to make to get that feeling is what I'm trying to learn.
 
That's what I like about racing :) All the geometry, leverages, forces & dynamics of the car at all times. I'm a big geek too :D
 
Understood. I also find the mechanics of a rotor to be quite fascinating. :thumbup:

So about this diff adjustment????:)
 
You need the front diff to be fully locked, actually a spool would be better. Rear diff needs to be somewhat loose.

As for the rest of the setup I have no idea, but the diff change should make a noticeable difference.
 
If you didn't understand math when you were in school your screwed on suspension setup!:p:
 
I don't know about that wbill. I don't think you have to have a spectacular grasp on traditional mathematics to understand setup theory. I think a better understanding of basic sciences is more important. Inertia, gravity, momentum... stuff like that. Now if you're actually attempting to make calculations based on metrics of those mentioned then yes, but generally you're just looking for a generall result... better or not.

Anyways, I think tighter diffs will help a lot... for both of my cars. I can't wait till next weekend to find out.:)
 
Tighter front diff will definitely remove some of that oversteer. I had a Schumacher Mission 2 EC, boy was that a tough cookie to setup. As soon as I lifted the throttle just a little, the ass end would come round.
 
Its not loose in the manner that the rear is losing traction. It just turns way too easily. I do have a feeling the front diff was waaaaaay too loose. I'm hoping the front will pull the nose out of the corner and tightening the rear died just a bit will hopefully help push a bit more like I want.
 

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