How much bump steer is normal in 65 Mustang

[minipete]

My 64.5 is RHD, has early Falcon steering box and XA brakes with resulting dreadful bump steer.

I have had it modified and it is now much improved but I feel it must have more bump steer than an original 65.

When jacked up at the front by the frame to unload the suspension it toes in about 1.5".  It used to be more like 3".

Should I be happy with this result or search for more?

I would be interested to see what happens when you jack up a factory original Mustang.

[pmb0186]

Hi,
I too have a RHD car and just checked the original engineering report to find 5.1mm bump steer that's sum of both sides. Full compressing to full extension (they remove the springs). So in your case about an inch a side. Rides great no effect on steering no matter the road surface.
There is a mod to fix that. Otherwise look at your idler and pitmen arm

[minipete]

Hi,
I too have a RHD car and just checked the original engineering report to find 5.1mm bump steer that's sum of both sides. Full compressing to full extension (they remove the springs). So in your case about an inch a side. Rides great no effect on steering no matter the road surface.
There is a mod to fix that. Otherwise look at your idler and pitmen arm

Thanks for the specs, I haven't measured mine in compression but static to full extension is much more than 5.1mm.  I will jack it up and take some measurememnts so I know what I am dealing with.

The attached photo is the before and after the work I had done.  It is with the suspension unloaded and shows what the left wheel is doing with the right wheel set to point straight ahead.

The mod I had done was to the idler and pitman arms which moved the whole steering assembly up about 2 inches.  This made a big difference but when you unload the suspension over a hump in the road it momentarily loses composure.  Not enough to be dangerous.

What is that the mod you are talking about?

[pmb0186]

There is a second mod the raises the height of the tie rods

[minipete]

I heard there was a guy in Qld that does this.  Is that what you are talking about?

[pmb0186]

an example of
https://www.mustangmotorsport.com.au/steeda-2015-20-bumpsteer-kit

[FB.65.68.70]

Global West do a bump steer kit for 65 mustangs . The link is the kits avail through CJPony


https://www.cjponyparts.com/global-west-bumpsteer-kit-manual-steering-v8-1965-1973/p/BSK10/

[minipete]

Are these kits legal in Aus?

Left to my own devices I would switch to rose joints and spacers but if I ever have an accident I have a feeling I would be in trouble with the law.

[pmb0186]

I guess if the tie rod was the cause of the accident you maybe in trouble
Question do you have an engineering certificate for the RHD conversion?

[minipete]

I guess if the tie rod was the cause of the accident you maybe in trouble
Question do you have an engineering certificate for the RHD conversion?

It was done around 1970 and has been registered in NSW since, but no certificate.

[pmb0186]

some years ago clubs in SA mandated engineering certificates for RHD conversion in order to retain club rego. They even help members with contacts to have their cars engineered. I wasn't one of them.