So I have been working on making a racing beetle for a while now but I keep running into a major problem. It doesn’t go straight. It will pull left and right on the straights but is almost an angel in the corners.
I run a stock 3.0L F6, full race AWD drivetrain, full race platform and handling and full race tire, max tire width front and back, etc.
However, no matter what I try the car always jitters on straights and is nigh uncontrollable. I’ve opted for no weight reduction and full roll cage for extra weight to maybe keep it grounded. Doesn’t help. I’ve also tried different stock engines and it’s still giving me trouble. I’ve tried softening suspension, roll bars, bump and rebound, but nothing works.
Have you tried setting the ride height to around 6/7.2?
I just tried a no aero AWD build of the beetle myself and while it was a little bit wandering around on straights I wouldn’t call it extreme by any means.
+1 (it’s all about the ride height since early FMs), yet, I would probably use aero. I think I might have a couple of tunes out there that did pretty well. Gotta check the settings.
I maybe late on this post, I had the same issue and found that having the ride height at the stock values with a front caster of 7 stopped it from swaying, also you could try with very stiff front ARB.
I actually just fixed this problem completely last night i spent days playing with caster, ride height, roll bars anything and at best I could make it go abit faster before it started turning or slightly reduce how heavily it was turning but at the cost of handling anyway turns out it was one simple thing . I don’t know if anyone is still interested but I’ll put the open source tune up and explain what was actually wrong with the car if anyone is?
Well due to the overwhelming amount of people interested I guess I’ll share it hahaha^ Ive tested it with pretty much any upgrades and it’s fine but I’ll put these up anyway I’ve done all these upgrades and tuned the car for B class circuit of the americas.
I’ll start from the right with the upgrades
Conversion
2.0l i4
Centrifugal supercharger
Aero
Race front bumper
Race rear wing
Remove rear bumper
Tires
Race compound
Max width front
Max width back
Sport rim style third last in the list TC 105 N
Max size front and back
Drivetrain
Sport driveline
Race diff
Handling
Race brakes
Race springs
Race rollbars front and back
Sport roll cage
Race weight reduction
Engine
Stock
Should be B class now.
Tire pressure 30.0 front and back
Camber
1.3 front
0.5 back
Toe
0.0 front
-1.7 (in) rear
Caster 5.0
That’s the part of the tune that fixes the steering issue it turns out the car randomly gets toe in the rear you can check this yourself by applying the upgrades and not the tune go into test drive and bring up the telemetry the second page is friction and if you accelerate you can see the lines for the rear tires go out completely sideways causing the car to turn itself -1.7 in gets the lines straight and it’s a normal car again