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In June 2014 I bought Bob Kramer's TR4A racecar after I crashed my TR3 =
at
the Zandvoort circuit (The Netherlands). It's a great car and it will =
get
better. Of my TR3, I only kept the engine and overdrive dogbox =
Overhauling
the front suspension, I found that the lower trunnion was moving on the =
bolt
instead of the bushed lower wishbones : the distance pieces in the =
wishbones
where shorter than original, so the trunnion was not clamped by these
distance pieces when fastening the bolt. Correcting this, the upright =
has
less play now, only a little in the trunnion, and this upright with
balljoint can't be forced anymore between the outer ends of the upper
wihbones, the balljoint is 1/2" too far to the rear. Turning the upper
wishbones to the rear (by moving the fulcrum pin) isn't a good option,
because binding will occur. I've drilled new holes for the brackets for =
the
inner ends of the lower wishbones : the suspension is moving without any
binding now but I don't know if I will leave it like that. I wonder if
something is wrong with the uprights? (less than 3=B0 caster?) If I =
measure
the caster, I find 2.2=B0 on both sides, but probably that isn't proving
anything. The chassis is as new, no damage. Any idea's someone?
Another question : trying to get at zero bump steer, the best I get at =
by
moving the steering rack is a J : the wheels are toeing in when lowered =
more
than 3 cm below ride height (minimal to 5cm, then more and more toe in).
Bending the steering arms to the outside, almost touching the brake =
disks
now, has straightened the J a little. Is it possible to eliminate the =
bump
steer completely, or have we(TR4A-TR6) to accept some bump steer in the
least important part of the suspension travel?
Marcel.
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<META content=3D"text/html; charset=3Diso-8859-1" =
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<DIV><SPAN class=3D733024020-08032015><FONT size=3D2 face=3DArial>In =
June 2014 I=20
bought Bob Kramer's TR4A racecar after I crashed my TR3 at the Zandvoort =
circuit=20
(The Netherlands). It's a great car and it will get better. Of my=20
TR3, I only kept the engine and overdrive dogbox =
Overhauling the=20
front suspension, I found that the lower trunnion was moving on the bolt =
instead=20
of the bushed lower wishbones : the distance pieces in the =
wishbones where=20
shorter than original, so the trunnion was not clamped by these distance =
pieces when fastening the bolt. Correcting this, the upright has =
less play=20
now, only a little in the trunnion, and this upright with balljoint =
can't=20
be forced anymore between the outer ends of the upper wihbones, the =
balljoint is=20
1/2" too far to the rear. Turning the upper wishbones to the rear =
(by=20
moving the fulcrum pin) isn't a good option, because binding will =
occur.=20
I've drilled new holes for the brackets for the inner ends of the lower=20
wishbones : the suspension is moving without any binding now but I don't =
know if I will leave it like that. I wonder if something is =
wrong with=20
the uprights? (less than 3=B0 caster?) If I measure the caster, I =
find 2.2=B0=20
on both sides, but probably that isn't proving anything. The =
chassis is as=20
new, no damage. Any idea's someone?</FONT></SPAN></DIV>
<DIV><SPAN class=3D733024020-08032015><FONT size=3D2 =
face=3DArial>Another question :=20
trying to get at zero bump steer, the best I get at by moving the =
steering=20
rack is a J : the wheels are toeing in when lowered more than =
3 cm=20
below ride height (minimal to 5cm, then more and more toe in). Bending =
the=20
steering arms to the outside, almost touching the brake disks now, has=20
straightened the J a little. Is it possible to eliminate the bump =
steer=20
completely, or have we(TR4A-TR6) to accept some bump steer in =
the=20
least important part of the suspension travel?</FONT></SPAN></DIV>
<DIV><SPAN class=3D733024020-08032015><FONT size=3D2=20
face=3DArial>Marcel.</FONT></SPAN></DIV></BODY></HTML>
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_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
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