Angle of wishbones
 

Angle/height of lower upright mount

I'm currently CADing my inboard-suspension'ed haynes roadster and am at a point where I'm fixing the rocker hard points, but I'm struggling to find any details of the orientation of the front and rear wishbones at standard ride-height (which incidentally is what?)

So, I'm after the following dims:

1) Standard ride height - front/rear (which tyres are assumed?)

2) Angle of front wishbone to horizontal (OR height of lower balljoint from ground level)

3) Angle of rear wishbone to horizontal (OR height of lower bush centre on rear upright from ground level)


I'm sure someone here will be able to dig these out for me! Cheers

Pavs

Generally, with unequal length wishbone suspension, the rule of thumb is to have the bottom wishbone parallel with the ground. If you aim for that, all the other angles will follow, and the ride height will be set by the wheel/tyre combination.

One can then adjust the ride height of the car, if necessary, with the spring platforms, usual reasons for doing this would be to cope with speed bumps, rough roads, engine or transmission parts grounding etc. and for corner weight adjustment.

agreed bottom wishbones parallel to ground is a good starting point.
Ray:)

Right-o! Will revise my design as at the moment I've got the lower wishbones slightly downwards - I'd imagine that would give me a bit of a monster-truck stance!

Just when I thought the rockers were spot-on...


Cheers guys

Front height approx 4ins from lower chassis rail and rear 5 1/2 ins at bottom of rail.
I measured this from Spuds car and it handles like a dream,more race car than soft road car even with 35 stone onboard on Saturday night.