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a body front suspension specs #630286
03/04/10 09:49 AM
03/04/10 09:49 AM
Joined: Jun 2003
Posts: 123
West Australia Australia
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n2ofish Offline OP
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n2ofish  Offline OP
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West Australia Australia
I have a '70 right hand drive Aussie Valiant (69 Dart) with 440/727 drag car weights about 3200 lbs. Can you please tell me what should I set the caster, camber and toe-in to. I seem to remember something about it in a Mopar chassis book, but someone has swiped my copy. I have just fitted Caltracs, new M&H slicks and raised the front and she seems to be all over the strip.
thanks Ian


Aussie 70 VG Valiant coupe,10.888 @ 122.44 so far
Re: a body front suspension specs [Re: n2ofish] #630287
03/04/10 09:57 AM
03/04/10 09:57 AM
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Romeo MI
MR_P_BODY Offline
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Romeo MI
Quote:

I have a '70 right hand drive Aussie Valiant (69 Dart) with 440/727 drag car weights about 3200 lbs. Can you please tell me what should I set the caster, camber and toe-in to. I seem to remember something about it in a Mopar chassis book, but someone has swiped my copy. I have just fitted Caltracs, new M&H slicks and raised the front and she seems to be all over the strip.
thanks Ian




Right or left wont matter.... as much caster as you
can get, 0 camber, 1/16" toe in... make sure the
rearend is square in the car... make sure you have
the tire pressure set right
EDIT
Also do all the measurements with the body UP 1" to
simulate going down track

Last edited by MR_P_BODY; 03/04/10 10:11 AM.
Re: a body front suspension specs [Re: n2ofish] #630288
03/04/10 10:07 AM
03/04/10 10:07 AM
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Central Oregon
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Rodney Offline
mopar
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Central Oregon
if you can't adjust in enough + caster find as set {for both sides} off set upper control arm bushings.
When installed correctly another degree or more can be found. Caster will help the front wheels center and keep the car going straight.
The A and b body cars seem to always be lacking enough caster.
Raising the front end could also cause some Drive ability issues. Keeping the ride height level may help as well.

Re: a body front suspension specs [Re: MR_P_BODY] #630289
03/04/10 11:01 AM
03/04/10 11:01 AM
Joined: Jun 2003
Posts: 123
West Australia Australia
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n2ofish Offline OP
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thanks for the info, I am going to the wheel aligner on Saturday. Even though I raised the front it is still lower than the back and the car is leaving the line level. I have been having problems getting the front to rise enough to put weight onto the rear.
Ian


Aussie 70 VG Valiant coupe,10.888 @ 122.44 so far
Re: a body front suspension specs [Re: n2ofish] #630290
03/04/10 11:49 AM
03/04/10 11:49 AM
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Central Oregon
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Rodney Offline
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Central Oregon
90/10 shocks
6 cyl torsion bars
we usually have the front end lower with stock type suspension,
when launching the inertia of the front end coming up helps plant the rear tires

Re: a body front suspension specs [Re: Rodney] #630291
03/04/10 12:20 PM
03/04/10 12:20 PM
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nc
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earthmover Offline
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nc
sorry to hi jack this post its good info cause i need to have my car ali , and have a ?? for you guys.. even with the back up form the s/s spring you lower the front down some???right now i have 90/10 fr and mp long drags in back.. i plan to go with qa-1 but got to get the budget inline with that..

Re: a body front suspension specs [Re: Rodney] #630292
03/04/10 12:37 PM
03/04/10 12:37 PM
Joined: Jan 2003
Posts: 3,031
Erda, UT
67Charger Offline
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Erda, UT
Quote:

90/10 shocks
Also do all the measurements with the body UP 1" to
simulate going down track




For clarification, he meant hold the front end up with a jack 1 inch over it's at rest height to simulate acceleration. That way your specs are ideal when you have your foot in it.


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Re: a body front suspension specs [Re: Rodney] #630293
03/05/10 12:12 PM
03/05/10 12:12 PM
Joined: Jun 2003
Posts: 123
West Australia Australia
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n2ofish Offline OP
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The car has 90/10 shocks, 6 cyl torsion bars, caltracs and Competition Engineering long rear shocks. Hope to go to Ranchero shocks next season.
thanks Ian


Aussie 70 VG Valiant coupe,10.888 @ 122.44 so far
Re: a body front suspension specs [Re: n2ofish] #630294
03/10/10 09:57 AM
03/10/10 09:57 AM
Joined: Jun 2003
Posts: 123
West Australia Australia
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n2ofish Offline OP
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n2ofish  Offline OP
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Joined: Jun 2003
Posts: 123
West Australia Australia
Put the car on the wheel aligner. Camber is fine but castor is over -1 degree, no wonder it has been weaving all over the strip. My wheel aligner races subaru's in rallys, so is not a Mopar expert. He is suggesting to make the strut rod out of threaded bar and pull the LCA forward to get some positive camber. I am thinking that this is going to put strain on the torsion bar and inner LCA bush. I have ordered some offset bushes for the upper control arm but wont be here before my next race. Can I safely use the threaded rod until I can fit the offset bushes?
thanks Ian


Aussie 70 VG Valiant coupe,10.888 @ 122.44 so far






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