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Author Topic:   Metric ballast question dry&slick
FirstLight7
Dirt Full Roller

Total posts: 69
posted September 08, 2004 08:43 PM  
As a general rule for a stock metric rear that works well on wet/tacky : 2400lbs car, If you placed 250-300 lbs of additional lead right on top of the lr spring bucket, what would you expect to occur on a dry slick surface? Loose in / tight off? Other?

How about if you moved the 300 lbs over the rr on dryslick?

Thanks

racer17j
Dirt Forum Champ
Total posts: 5390
posted September 08, 2004 09:44 PM  
Remember that hanging it farther back can cause other problems, If by chance you loose a weight that far back it will kill your rear%. If you can use more without going to far over tha weight you are now you will be better off.
For a dry slick rather than adding weight try to move the existing weight up higher to get the chassis to roll over and plant the right rear. You will not change the scale numbers if it goes straight up but it will tighten up the car.

bobaluuu
Dirt Freak

Total posts: 474
posted September 09, 2004 07:35 PM  
my question is "where is a street stock class that allows 2400lb cars, and how do you get correct %with that weight?"

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FirstLight7
Dirt Full Roller

Total posts: 69
posted September 09, 2004 07:38 PM  
The car (SIMS) that I'm in this year could use a lot more forward bite on dry. I'm not spinning the tires and the RR seems to plant fine on slick, rear drifts kind of loose on the throttle. Lately we are real quick on everything else. Rear tire temps are usually within 20 degrees of each other for all track conditions. Haven't scaled in 2 months. We are continually tuning the setup to what the car likes. I will probably scale it soon to record a baseline that I'm happy with.

I was going to try something different next time it slicks over. Just using higher lbs for an example to gauge how the stock metric rear may handle if I went the wrong direction with too much weight on the left or right.

Thanks for your replies

cd2
Dirt Maniac

Total posts: 161
posted September 09, 2004 09:41 PM  
Firstlight7,If the car is just a little throttle loose on the dry i would use less stagger with the same L.R.weight, or go a little stronger on L.R.spring .Can use easy up shocks on the front & a softer comp. on L.R. maybe a little more C.W.only. If you get it like you want it on exit & it is a little loose on entry you can stiffen the R.R.shock on comp.& soften the L.R. on rebound & tighten entry back up or raise a little weight up heigher for better side bite. cd2

cd2
Dirt Maniac

Total posts: 161
posted September 09, 2004 09:46 PM  
Firstlight7,forgot about L.R.trailing arm.can you raise it at the front mount or lower it at the rear mount? If so this will help bite when on the gas. cd2

cd2
Dirt Maniac

Total posts: 161
posted September 09, 2004 09:54 PM  
Firstlight7,to answer the question about the weight.If you add weight to the L.R. it will loosen on entry & tighten on exit. If you put it on the R.R.you can make the car tight on entry & loose off or you can go to far & make the car very loose on entry & burn the R.R.tire off very quick.Another thing on the loose exit,move your L.R.trailing arm up at the front or down at the rear & this will help bite when on the gas. cd2

    

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