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Old 07-02-18, 11:01PM   #1
turbo louie
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Default figuring how to work a stock suspension in a A body.

Im trying to figure out how to adjust the stock suspension in my lemans. Its making around 700rwhp . So im not sure if this power level is past the limits of it. I do have adjustable uppers installed with rear sway bar . Can someone suggest some things to try. I really have no clue about this stuff..

Heres a video of the suspension working under the car and one of it racind a car from behind ..

If anyone can give some input / suggestions on something i could do for helping my car work better would be appreciated ..

https://www.youtube.com/watch?v=vVSIgtafowA

https://www.youtube.com/watch?v=kE6NDY0ed9A
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Old 07-03-18, 12:45AM   #2
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Charlie
I'm sure you have seen the diagram showing a vehicle showing the anti squat line rising up from the rear tire going forward. If the intersection of your rear control arms fall below that line the rear of the car will squat. If they intersect above that line the rear should separate from the body and plant the tires. Just how far forward and above that line dictates how violent it will plant the tires. This can be controlled by the shocks to a certain degree depending on the intersection point.
The old no hop bars they sold for A body cars worked for most lower hp cars. With a higher hp car they put the intersection point where it was just to violent even with a good adjustable shock.
There's also a few companies that sell an anti roll bar that helps also.
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Old 07-03-18, 12:49AM   #3
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Old 07-03-18, 03:10AM   #4
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I think it would help if he had some moroso springs in the front.
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Old 07-03-18, 03:43AM   #5
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Here
Thanks for posting that. I have no issues with traction at the moment.
But something tells me will in the not too distant future.
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Old 07-03-18, 09:21AM   #6
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Yes ive seen it. I posted that same diagram on py. The problem is im not sure how to figure out where my car is at. It must be close to neutral because the front dont lift im thinking. But who knows maybe im wrong.. do you know how to figure this out for my car . i dont even know where to start measuring to start to try.. lol
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Old 07-03-18, 09:23AM   #7
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Im going to look into the springs but how do you know what spring rate to choose for your car? i would like to weigh the front and rear but i dont have any scales ..
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Old 07-03-18, 12:25PM   #8
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I got a chassis book I use... iíll try and dig it out today, see if it explains the process figure out were to start. Mean while Iíd call some spring companyís and see what they say for a spring.
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Old 07-03-18, 02:43PM   #9
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im trying to find someone that has some scales. I think that will be the first step with this...
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Old 07-03-18, 04:17PM   #10
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im trying to find someone that has some scales. I think that will be the first step with this...
I think you are right. Once you get that info you will get your starting point.
That is where our local chassis guy starts and he is very good.
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Old 07-03-18, 06:15PM   #11
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I looked at what Moroso has for my car . They have a 213lbs 240lbs 241lbs 250 lbs ..

So whats up with the 240 lbs and the 241 lbs lol. Whats the difference there?
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Old 07-03-18, 08:30PM   #12
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Is the front end loose enough where you can pull on it with your hands and pull the car up 2"-3"
If not that's where you start.
I just use regular moog springs for the car, can also use the moroso springs but they don't last for years of street driving.
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Old 07-04-18, 06:14AM   #13
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I gues it will rase that far. but not much further. Its hard to pull up on the front end , it goes down real easy though. Maybe its the shocks doing this? Maybe ill try disconnecting them and see what that does....
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Old 07-04-18, 11:21AM   #14
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https://www.santhuffshocks.com/springs.html
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Old 07-04-18, 11:38AM   #15
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X2 get your car scaled and give them a call with that info.
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