10 replies to this topic

[Mrpeanut]

I've just had a conversion from front drums to discs 10's, with a new steering rack, cones, adjustable arms and hi los. All new components.

The car has since been set up by a very well reputed suspension guy.

It now pulls sharply to the pet and steers heavily. The suspension guy is sure that it's been set up perfectly. The guy who fitted all the parts is sure that everything went together properly. Something is obviously wrong and the car is all but undriveable.

The only thing the suspension guy pointed to was a bit of a thrust angle at the rear. However, it drove straight before all the changes and now has the advantage of adjustable caster etc etc.

Any thoughts on where I should be looking, or rather which of the 2 people should be looking?

[smurfomatic]

Try taking one (or both) on a test drive to see what they think. Describing a problem is one thing, experiencing them is a better way to explain it!

[smurfomatic]

Personally I would think it's the steering & brakes guy's issue rather than the suspension, 

[Mrpeanut]

Try taking one (or both) on a test drive to see what they think. Describing a problem is one thing, experiencing them is a better way to explain it!

Brake etc guy has driven it and accepts it's awful but is adamant it's a suspension adjustment issue.

[ChopperHarris]

Take it to MOT place, check efficiency side to side, argument sorted

[ChopperHarris]

And I will bet its down to caliper piston stickingne

[Mrpeanut]

And I will bet its down to caliper piston stickingne

Possible but the pull is more severe than a sticky caliper. Proper pull as if tracking a mile out, although the toe is spot on so not that!

[Cooperman]

What is the caster angle on each side?
It is unlikely to be the brakes.

[Mrpeanut]

What is the caster angle on each side?
It is unlikely to be the brakes.

That's the curious thing, the print out doesn't show it. All other figures there, but not caster which is my guess for the problem. I don't think it's the rear either but I'd prefer a steer (no pun intended) from those with more knowledge.

What would be an optimum setting I should ask the guy to set to? I'll get him to have another attempt before I do anything else.

[Cooperman]

Try 3.0 to 3.5 degrees caster.
Also check the camber. It needs to be within 0.5 degrees the same both sides.
Also check that the rear wheels have 1mm to 2mm toe-in, although it is doubtful if the rear toe is the problem.

[Mrpeanut]

Try 3.0 to 3.5 degrees caster.
Also check the camber. It needs to be within 0.5 degrees the same both sides.
Also check that the rear wheels have 1mm to 2mm toe-in, although it is doubtful if the rear toe is the problem.

OK. Front camber is -0°45 left and -0°30 right.
Rear camber of is interesting. Left is -1.6 mm and right +3.1 mm.

Not sure what it all means but the rear toe doesn't look too clever.