rear suspension caster

[Garrett Reid]

I would like to get a feel of what people are running for caster at the rear for vehicles with the bias to the rear. With a low cg and with the weight bias towards the rear (being that's where the engine and tranny sit), what seems to be a good built in setting to start from?

[Frank Catt]

Hi Garrett, Useing original pattern rear uprights on GTDs, I set the caster at 7.5 degrees, similar to the settings on the original cars. This works well on the these cars, Frank

[Russ Noble]

If you're interested, there's a recent thread on rear suspension setups on the RF Section. Whys, wherefores and solutions to problems.
Rear suspension bump steer

Cheers

[Garrett Reid]

Thanks guys. Holy cow 7.5 is huge, this must be effective at keeping squat to a minimum as well. I'll spend some time tonight reviewing the other thread. Nice site by the way Frank. I'm on a tidy learning curve going from front heavy american to low light and mid engine design. Must get my ducks in a row though!

[Charlie M]

This may be a stupid question but I'll ask anyway. Which direction is the 7.5 degrees? Is the top of the upright rotated toward the rear of the car or the front?

Thanks,
Charlie

[Russ Noble]

Top to the rear Charlie.

Cheers

[Bill D]

Good thread. I would like to ask a real basic question related to this - how do I measure caster?

Thanks for helping
Bill D

[Charlie M]

Thanks Russ!

Charlie

[Ross Nicol]

Bill
I use my digital level (the one I use for camber) but what makes it easy is the RF upright has a vertical plane on the rear of it, to sit the level on.
Ross