69 Barracuda front RMS suspension issue

CRUZE 418 said
Difficult to get a good front end alignment these days, but will work on the positive caster.
Thank you!

I wouldn’t think it would be hard at all to get plenty of positive caster with that RMS suspension, and camber bolts should be well within the capabilities of even a basic alignment tech. I bet you have a factory spec alignment on suspension that has no business using the factory specs.

I wouldn’t be surprised if some shops wouldn’t touch it just because it’s aftermarket though.

But yeah, 245’s on an RMS suspension shouldn’t be “jumpy”.

DionR said
My brother has struggled with his ControlFreaks front suspension because the rack gives way too much steering angle. He talked to the manufacturer about getting a rack with shorter steering stops or something and they couldn't (wouldn't?) help him so he is going to add his own external steering stops.

Best guess is that everything is fine when the wheel and tire are narrow enough, but add a wider wheel and/or more backspacing and it becomes an issue. My brother is running a pretty deep custom BS wheel because the suspension seems to be much wider than factory and he couldn't get the tire under the fender without doing something like that.

I would bet that is the issue here, the RMS rack allows for too much steering angle for the wheel the OP is running. Maybe a custom steering stop would work here?

The one outlier is Joe and his Mustang rims. Maybe RMS changed the rack since then?

That’s interesting. Even with “too much” steering angle you’d think the tires would contact the frame first. Since they don’t that would mean the rack reduces the clearance to the rims compared to the stock steering.

I could be mistaken, but I thought RMS used a modified rack. I know one of the original beefs with the RMS was reduced steering angle. I don’t recall hearing about wheel clearance issues at the OP’s amount of backspace though. Maybe an unmodified rack got through? Or maybe RMS had to change suppliers or something, it’s tough to do aftermarket stuff like that and always have to be babysitting suppliers and production quality on stuff you’re using and not making. Like it might not be an issue at all for the original intended application, but it creates issues with the custom use.