Hi all. New user.
I have an RF04 Van Diemen and am having some trouble with setup. It was a Zetec and has been fitted with a 1.6L Duratec which is the control engine here in Aus.
With the car on the flat patch the body leans 0.4deg, which doesn't sound like much but actually is quite a bit over the width of the car. A straight edge has 10mm difference between the upright mounting top brackets.
All arms front and rear are symmetrical. All springs/shocks are setup as same pre-load and are same length both under load and free, other than the LHS rear spring which compresses 1mm more than the RHS for some reason. Camber, caster, toe, preload, corner weights all symmetrical.
The exception is the rear pushrods, which are not the same length. I can not for the life of me work out why this is so, and why the car is on a lean. I can get it to straighten up by lengthening the RHS rear pushrod two turns (12 flats), but of course this bu**ers up the spring preload and corner weights on that corner.
I have checked engine / box / chassis and all are on the same lean, so it is not an engine to chassis mating issue.
The only random factor is the guy before me fitted a bottom bracket from an RF06. Not sure if this has an impact.
Should the VD have this lean? It doesn't make sense to me if so as the geometry will not be symmetrical.
Any ideas on what the issue could be?
Charles
I have an RF04 Van Diemen and am having some trouble with setup. It was a Zetec and has been fitted with a 1.6L Duratec which is the control engine here in Aus.
With the car on the flat patch the body leans 0.4deg, which doesn't sound like much but actually is quite a bit over the width of the car. A straight edge has 10mm difference between the upright mounting top brackets.
All arms front and rear are symmetrical. All springs/shocks are setup as same pre-load and are same length both under load and free, other than the LHS rear spring which compresses 1mm more than the RHS for some reason. Camber, caster, toe, preload, corner weights all symmetrical.
The exception is the rear pushrods, which are not the same length. I can not for the life of me work out why this is so, and why the car is on a lean. I can get it to straighten up by lengthening the RHS rear pushrod two turns (12 flats), but of course this bu**ers up the spring preload and corner weights on that corner.
I have checked engine / box / chassis and all are on the same lean, so it is not an engine to chassis mating issue.
The only random factor is the guy before me fitted a bottom bracket from an RF06. Not sure if this has an impact.
Should the VD have this lean? It doesn't make sense to me if so as the geometry will not be symmetrical.
Any ideas on what the issue could be?
Charles
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