Wheel alignment specs with new Hotchkis Arms.. - Chevelle Tech
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post #1 of 12 (permalink) Old Mar 25th, 20, 10:23 PM Thread Starter
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Jim
 
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Wheel alignment specs with new Hotchkis Arms..

Just redid the front end of my 72 with new upper control arms, rebuilt lower arms, and new sway bars and had a question on whether -1.9 was too much for camber? This is for the right side and the drivers side is -1.6. As far as the shims, there are a few on the rear bolt on the right side and one or two on the rear bolt of the drivers side.

I got the car with Hotchkis springs and a full rear suspension, so I added Hotchkis upper control arms and both sway bars to complete the package seeing everything else was Hotchkis. I have 3.7 and 4.0 for positive caster and 0 for toe.Car handles great as well..

Just asking how much is too much? I know Hotchkis wants between -1 and -1.5 for the camber...

Thanks in advance guys...

72 SS 402/4 speed/Straub roller and a bunch of Duramaxes.....
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post #2 of 12 (permalink) Old Mar 26th, 20, 6:01 PM Thread Starter
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Jim
 
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Re: Wheel alignment specs with new Hotchkis Arms..

no one??

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post #3 of 12 (permalink) Old Mar 26th, 20, 10:24 PM
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Re: Wheel alignment specs with new Hotchkis Arms..

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Originally Posted by jrkrace View Post
Just redid the front end of my 72 with new upper control arms, rebuilt lower arms, and new sway bars and had a question on whether -1.9 was too much for camber? This is for the right side and the drivers side is -1.6. As far as the shims, there are a few on the rear bolt on the right side and one or two on the rear bolt of the drivers side.

I got the car with Hotchkis springs and a full rear suspension, so I added Hotchkis upper control arms and both sway bars to complete the package seeing everything else was Hotchkis. I have 3.7 and 4.0 for positive caster and 0 for toe.Car handles great as well..

Just asking how much is too much? I know Hotchkis wants between -1 and -1.5 for the camber...

Thanks in advance guys...
I think you answered your own question in bold... Too much is when the car won't handle well or you start to ruin tires.

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post #4 of 12 (permalink) Old Mar 27th, 20, 12:19 AM Thread Starter
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Jim
 
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Re: Wheel alignment specs with new Hotchkis Arms..

Thanks..I thought there was a numerical limit that should be adhered to. Iíve been seeing everything from +1 to -.05..

72 SS 402/4 speed/Straub roller and a bunch of Duramaxes.....
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post #5 of 12 (permalink) Old Mar 27th, 20, 1:37 AM
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Chris
 
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Re: Wheel alignment specs with new Hotchkis Arms..

-1.9 degrees is a lot of camber for the street. What you could do is put some chalk markings on the edges and do some spirited driving and see how much it rolls over on the sidewall.

I run -0.75 degrees on my 15" tires and on the road course where I load the suspension FAR more than the street, I definitely could use more camber. I would say -1.5. On the street I don't think I would want to run that much as it might prematurely wear the inside shoulder.

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post #6 of 12 (permalink) Old Mar 27th, 20, 8:03 AM
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Jeff
 
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Re: Wheel alignment specs with new Hotchkis Arms..

You usually start off with the generic alignment numbers and then tweak it here and there to get it were you like it..

I prefer very low camber usually .25 with a high caster usually 7 or 8. That way my car will track nice and straight on the highway without all that camber thrust from having the front wheels tilted so deeply, but when I turn that high camber is right there from having the caster set real high..

Also these cars have a KPI of 7 to 8 so you want to keep the caster slightly under that number as some gurus say..
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post #7 of 12 (permalink) Old Mar 27th, 20, 9:36 AM Thread Starter
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Jim
 
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Re: Wheel alignment specs with new Hotchkis Arms..

I was thinking that itís a little too much myself. When I assembled everything back together, it had a negative camber with no shims anywhere. Iím thinking the rebushed lower a arms in combination with the new uppers really gives it a little too much. Hotchkis builds the upper with some negative camber, and I think itís adding a bit much...

I guess I donít have much of a choice other than to keep an eye on it and see what happens...I wonder if the UMi or Global West bars have this ďbuilt inĒ negative camber as well..

72 SS 402/4 speed/Straub roller and a bunch of Duramaxes.....
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post #8 of 12 (permalink) Old Mar 27th, 20, 11:56 AM
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Re: Wheel alignment specs with new Hotchkis Arms..

If you have no shims anywhere as you have stated, You,re going to need offset control arm shafts to get this sorted out.This is usually caused by the frame sagging in the front crossmember. Adding shims is is only going to make the camber more negative. I wouldn't go more than .5 degrees negative on any street car as tire wear will be noticeable.
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post #9 of 12 (permalink) Old Mar 27th, 20, 12:23 PM
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Re: Wheel alignment specs with new Hotchkis Arms..

Front tire size also has a big effect on how the camber effects the handling.That much camber on a really wide tire and you will be up on the tires edge and it will wear quick .Get your camber down to about -.75 or .5 and get your caster up to around 5 degrees with the toe-in about 1/16th per side and you'll have a great handling car.
Doh I missed the part about "no shims" but after re-reading you said re-built lower control arms ? are they stock lowers ? I would call Hotchiss and ask if adding their lower arms would change that camber reading.

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post #10 of 12 (permalink) Old Mar 27th, 20, 11:36 PM Thread Starter
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Re: Wheel alignment specs with new Hotchkis Arms..

I had Glenn Lever rebuild the lowers with all Moog bushings and ball joints. Iím thinking that might of added a very small amount of negative camber due to the bushings maybe being shot. The Hotchkis arms has offset shafts but I need to grind the frame mounts for them to fit, so that might be an option. My stock uppers arms had two shims on the passenger front bolt...

I have 235/60/15 on 15x7 wheels if that matters...Iím beginning to think I have a touch of frame sag..

72 SS 402/4 speed/Straub roller and a bunch of Duramaxes.....
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post #11 of 12 (permalink) Old Mar 27th, 20, 11:43 PM
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Re: Wheel alignment specs with new Hotchkis Arms..

I have a UMI stage 5 kit on my car and went with the street performance.

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post #12 of 12 (permalink) Old Mar 28th, 20, 11:22 AM
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Jeff
 
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Re: Wheel alignment specs with new Hotchkis Arms..

If your happy with the way it handles leave it alone..

I like the -.25 to 0 setting for street. I find that having very low negative camber settings lets my car track well on the highway. Then I have my positive caster cranked up to 7-8 and this gives me all the camber I want when I need my car to handle around the twisty's..
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