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Author Topic:   Ride Heights
Rat Trap
Dirt Maniac

Total posts: 129
posted March 21, 2005 08:56 PM  
I was told that your ride heights should be LF lowest, followed by the LR, followed by the RF, followed by the RR being the highest.

Is this always the case? Or do you guys get your weight where you want it then take a ride height measurement for reference and don't worry about the difference in ride heights?

Also would raising or lowering the ride heights equally on all 4 corners change your percentages? I believe it would because of the different spring rates, this is a discussion amongest our crew

joeltjen
Dirt Maniac

Total posts: 182
posted March 21, 2005 09:25 PM  
our ride heights are: lf=5 3/8 lr=5 3/4
rf=5 3/4 rr= 6 1/8 . your ride heights should be given to you by your chassis builder. if you built your own your front ride heights need to be calculated to achieve the proper a frame angles to get your roll center where you want it. try to get 3/8 to 1/2 inch difference left to right. once you have this set your lr the same as your rf and get the same difference to the rr as you have across the front. now set your trailing arm angles to get the anti-squat, rear steer, "bite" that you want. i can be off a little on my rear ride heights but my front needs to be right on,(ford rear steer) or it dont want to work at all. raising or lowering all four corners will do nothing as far as corner weights or cross weight. it will only affect your roll center, anti-squat ect. fuel the car first, set air pressure next, add or subtract ballast, change springs next, then set ride heights. now you can adjust cross weight with your weight jacks. if you need more screw the rf and lr down and the lf and rr up the same amount.if you need less do the opposite. this will keep your ride heights set while changing cross weight. weight jacks WILL NOT change left side or rear pecentages. crossweight and "bite" are two different things. you can add "bite" to a car and have less cross weight by moving ballast to the left side of the car. spend lots of time on the scales and move things around, you might be supprised by moving ballast where the weight actually goes! hope this answered some of your questions, john

rocket36
Dirt Freak

Total posts: 209
posted March 22, 2005 01:57 AM  
to answer your question, no, that isn't always the case.
under the advice from another racer & the guys at rocket chassis, we now set our left front ride height higher than the right (to there recommended measurements). and we will regularly raise the left side static ride height (front & rear equally) to increase side bite.

Kromulous
Dirt Forum Champ
Total posts: 796
posted March 22, 2005 06:28 AM  
I usually end up with the front ride heights about even, and the rear higher then the front.

I actually manipulate the ride heights quite abit. Raking the chassis fwd, or aft (lower in the rear than the front & vice versa). Usually a car thats lower in the front is more aggressive steering wise than when its level or lower in the rear.

The side bite thing from the high left side sounds interesting. I think i may toy with that this season on some of the slicker tracks around here.

For now thou, i would use what the maker recommends (it irks me to say that LOL) and then get a basic set up, so you can use it as a baseline.

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