caster for a fast steer box - Impala Tech
 
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post #1 of 13 (permalink) Old 04-10-2013, 06:56 PM Thread Starter
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Smile caster for a fast steer box

With my front suspension set up to stock alignment, The car(1965) tends
to oversteer with the Jeep cherokee steering box.

How much additional caster should I ask for when I have it realigned?

Don
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post #2 of 13 (permalink) Old 04-10-2013, 07:03 PM
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As much as they can get. Preferably +1.5º (which is probably all you can get). Your new box is not causing the caster problem.

Tom

1965 Impala SS Tahitian Turquoise 427 4 Speed
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post #3 of 13 (permalink) Old 04-11-2013, 11:01 AM Thread Starter
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I have tubular upper A arms so I think I can get a maz of 3 degrees but, I do not know if I should go that much.....anyone done this before?

Donnie
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post #4 of 13 (permalink) Old 04-11-2013, 11:22 AM
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So long as you have power steering, the more caster, the merrier. You can watch the front of the car rise and fall while parallel parking your car at the car show because with a lot of caster you have to pick up the weight of the car to turn the wheel. It is that weight sitting on top of a lot of positive caster that straightens it out the steering wheel and makes it drive arrow straight down the road.

Without power steering, stick with the stock front end settings unless you want to look like "Popeye the Sailor" after a while (the anchor tattoo is optional).

Big Dave
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post #5 of 13 (permalink) Old 04-11-2013, 12:05 PM Thread Starter
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Smile

Thanks Dave......

Anyone running a lot of caster?

Donnie
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post #6 of 13 (permalink) Old 04-11-2013, 01:55 PM
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What are you running for front and rear sway bars?

Two doors, four doors, wagons, and ragtops.
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post #7 of 13 (permalink) Old 04-11-2013, 07:54 PM Thread Starter
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The front sway bar is stock(originally a 6 cyl car) w/no rear.

Donnie
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post #8 of 13 (permalink) Old 04-11-2013, 08:43 PM
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It shouldn't be oversteering, it should be understeering. Let's make sure we have our terms correct. Oversteering would be when you are going around a corner, fast, and the rear end wants to break free and swing around. Understeering would be taking the same corner, but the front tires are sliding towards the outside of the corner (not going where you point).

Two doors, four doors, wagons, and ragtops.
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post #9 of 13 (permalink) Old 04-12-2013, 02:27 AM Thread Starter
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Smile

Jason.....I am not talking about cornering, its fine doing that.
I am talking about keeping the car going straight...the car's steering
is sensitive like what you would expect if there was not enough
caster.

I am sure that I need more caster built in to the front suspension the question is ......how much additional caster over stock should I ask for.

I have always heard that with radial tires you need more than stock caster & in addition to that I have a quick steering box which also
would require more caster.

Donnie
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post #10 of 13 (permalink) Old 04-12-2013, 07:30 AM
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On my camaros I ran 5-6 * caster. See how much they can dial in when you get the alignment. I think 1.5 is too little.
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post #11 of 13 (permalink) Old 04-12-2013, 10:39 AM
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Quote:
Originally Posted by weldvair View Post
Jason.....I am not talking about cornering, its fine doing that.
I am talking about keeping the car going straight...the car's steering
is sensitive like what you would expect if there was not enough
caster.
That's what I figured. I didn't think you were talking about oversteering.

Two doors, four doors, wagons, and ragtops.
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post #12 of 13 (permalink) Old 07-23-2013, 08:17 AM Thread Starter
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Let me put it another way.....the steering is too sensitive.

Donnie
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post #13 of 13 (permalink) Old 07-23-2013, 11:00 AM
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That is a problem with older steering boxes. In the mid eighties the Saginaw power steering box was redesigned to use a larger diameter torsion bar to take most of the power steering out when going straight ahead so that the box isn't so twitchy.

http://www.carcraft.com/techarticles...e/viewall.html

Unfortunately in the early eighties GM also went metric: which requires a special hose adapter (to convert the O-ringed Metric port to seal up with a an inverted flare SAE hose), or a special hose to be made with metric (and O-ring) on one end and the SAE inverted flare on the other.

Big Dave
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