Mayf;
14 degrees of caster sounds like way more than you really need but who
knows?
My car has a 98 inch wheelbase and is set up for 7 degrees of caster in the
front end, with close to zero camber and <1/16" toe- in. My car is mid-
engine so there is little similarity with your Sunbeam....and mine has yet
to turn a wheel. :(
Regards, Neil Tucson, AZ
-----Original Message-----
From: land-speed-bounces@autox.team.net
[mailto:land-speed-bounces@autox.team.net] On Behalf Of drmayf
Sent: Tuesday, June 16, 2009 7:11 PM
To: LSR
Subject: [Land-speed] Sunbeam Suspension
Seems the List Manager has flagged me for too long a post. So I will
break it down into theree parts
Par 1
Well, today I declared success on getting the suspension setup. Is it
right? I do not know, but for sure it is what I have, lol. Lemme review
the car first. It has a race strut front suspension with a lower A arm.
Caster is approximately 14 degrees. Maybe more, maybe less, hard to
measure. But it is the same on both sides. In the rear is the 4 link
system with a diagonal locator link. The bottom link is parallel with
teh frame and th etop link is out front of the car somewhere. Two
adjustable shocks and coil over springs. Wheel base on the car is 90
inches (yeah, it is short). The rear has 6 degrees of freedom. Because
I am of portly stature ( nah, fat is the real word), I found 275 pounds
of iron in the shop and put that in the drivers seat as lard simulator.
I made a couple of tools to help me with the front end as I though that
was the right place to start since it has the fewest degrees of freedom
to actually mess with. I made many many false starts because of a lack
of experience and knowledge in doing this, but I wont address all the
mistakes I made. Here is what I wound up with to the best I could measure:
Front End
Camber LF <<1 degree (<< means much less than) RF <<1 degree
Caster approx 14 degrees positive
Toe in <<<< 1/32 inch
Steering wheel centered as measured by a level.
Rear End
Parallel with the front wheels to within a 1/32 inch.
Thrust Angle is as close to ) degrees as I could make it <<<1 degree
Off set of rear to front is approx 9/16 inches (9/32 per side) Any
closer and I would have clearance issues. I used shade tree process to
mount the race frame in the body so I am sure that is the error.
see part 2
mayf
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