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rear wishbones
t.j. - 5/2/06 at 07:26 PM

Hey,

Today I tried to calculated my roll-centre at the rear and gues what.

If you build by the book you get a negative roll-centre. Also the wheelmovement is no good.

I'm going to place the inner brackets from the upperwishbone at 62mm below the orginel place. This is resulting in neg. camber and de inst. centre is at the "normal" side of the car. My rollcentre is going to be at 100 mm above the surface.

Has anybody better idea's?

Mix - 5/2/06 at 07:39 PM

That's the one

My inboard wishbone mounts have 224.5mm vertical separation.

Mick

andylancaster3000 - 5/2/06 at 08:31 PM

Is this with a live axle or IRS?

We did some analysis on the front. I can't find the drawing now but I sem to recall it showing that the geometry being suprisingly good.

Andy

Mix - 5/2/06 at 09:43 PM

I'm refering to the IRS as per the Tiger Avon 'loose leaf' book

Can't comment on the Avon front geometry, I'm using modified 'Book' design.

Mick

DaveFJ - 6/2/06 at 01:05 PM

This all theoretical....

everyone i have talked to says the Avon handles remarkably well as is ......

t.j. - 6/2/06 at 05:56 PM

quote:
Originally posted by andylancaster3000
Is this with a live axle or IRS?

We did some analysis on the front. I can't find the drawing now but I sem to recall it showing that the geometry being suprisingly good.

Andy


We had to recalculate the front because we use a different nose-cone and bonnet.
The top of the frame is at the front 50 mm smaller.

The lines through the wishbones all come together in one point, about 3 meters outside the car. Only the line of de tie-rod is about 3 mm off-course. (escort mk2)
Bumpsteer is 0.02 degr now. (hope I can build it like the drawing)

The rear is IRS by the "orange-book".As the upright at the rear is smaller than the distance between the upper and lower bracket we decided to re-do the rear.

We want to stick by the lower wishbone (only make it symetrical). The uprights gonna be modified because who want's "turned" brakes?. Because of all this we decided to place the roll-centre at 100 mm and than place the upper at the right point.

So I hope i've done the best i could?

Northy - 6/2/06 at 05:58 PM

Any pictures?

t.j. - 6/2/06 at 06:09 PM

quote:
Originally posted by Northy
Any pictures?


hmmm

How? tell me....

Then maybe in the weekend, due that the drawings are in the computer of my friend.