I can’t remember asking this here: we have an S&W soft tail dragster for my son.
Pushing it around on flat ground the wheel will turn right. Quite a bit. Rear end is centered and straight. Car strings straight. Rack snd steering are straight and centered. Wheels/tires are straight and have just a little toe in.
Seems like all the normal stuff checks out. It pulls a little going down the track. Nothing looks odd looking at the car

Measure the rollout of the rear tires - is one larger than the other?

Average toe 1/16 in.

Everything said above I would also check the rod ends that make up the tie rods and if the steering shafts have any u joints might want to peek at those as well

quote:

Originally posted by 183N:
Measure the rollout of the rear tires - is one larger than the other?

The issue 99.9% of the time.

No ujoints in the steering. Tie rods are not at all loose. 1/16 or so toe. I have not measured the roll out. But these tires came off my other dragster, which had no issue with this. i gotta say it's a head scratcher.

Measure or swap the tires and see if the problem follows the tire.

Try a bit more toe in, I have a friend that her dragster front would always hunt going down the track, change toe in to 1/8 per side, 1/4 total and the car goes straight down the groove now and no tire scrubbing. That little change made it a whole different car to drive.
Be worth a try, its free

If a simple toe adjustment does not help, since it a 4 link car you could always add some rear steer to the rear end housing. When I first switched mine to top dragster the faster I went the more the car wanted to go left in the middle of the track, rear steer cured that once I moved the housing the correct way as I was looking at it all wrong at first.

Does it have any front end stagger.
If so, you may need a little more toe in.

Rollout within 1/4". It's just weird that even pushing it in the lanes, it will pull right. No stagger. I could stick a little more stagger in it. When I bought the car, the front tires were worn. I have a feeling that the PO had the same issue, and used more toe in.

what about anti roll measurements

quote:

Originally posted by rusty:
what about anti roll measurements

What do you mean?

is it possible there is enough preload on the antiroll to make it walk a little bit in a distance

just throwing thoughts could a brake drag and do that

If the left spindle is slightly lower or a significant amount of weight bias than the than the right it would push to the right due to caster.

I would try swapping front wheels and see if that changes anything and makes it go left.

Great thoughts and things to look at

quote:

Originally posted by bry-war:
If the left spindle is slightly lower or a significant amount of weight bias than the than the right it would push to the right due to caster.

Caster was my first thought.

Let us know what you find out.