Landracing Forum
Tech Information => Technical Discussion => Topic started by: KEVIN on March 23, 2004, 01:57:00 AM
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I AM CURRENTLY BUILDING A 86 CAMERO TO RUN IN THE ALTERED CLASSES. I PLAN ON RUNNING ABOUT 220 TO 240MPH RANGE. I WOULD LIKE TO KNOW WHAT THE FAST GUYS ARE USING FOR WEIGHT RATIOS FOR THE FRONT AND BACK OF THEIR CARS.
THANKS FOR YOUR TIME.
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-I can say that with an older Camaro that the biggest problem is finding places to put all the weight.
-One thing that I feel is NOT good is to have weight in the trunk or behind the rear axle.
-At those speeds the nose wants to lift and a spoiler on the rear deck lid makes the tail squat so that also makes the nose lift.
-maybe the newer cars aren't so bad but I would look at EVERY PLACE you can find in front of the rear axle.
-I would put about all I could get up in the front but you'll find that 500lbs is a lot to hang up there in the front anywhere.
-Then I'd put the rest of the ballast as low as possible where the rear seat floor is.
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-As for the front to rear ratio I can't say but you'll be hard pressed to get 1000# stuffed in there and have much control of the ratios if you keep the weight out of the trunk area.
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Kevin, I would think your looking to have about 55% on the front and 45% on the rear.No less on the front as you want the car to track straight.Please remember to have your car scaled F/R and side to side.Around here it' only cost about $100.00 to scale a car. A good source is a round track chassis shop or a racer with his on scales.
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Kevin, fwilly & Randy have got it about right,I have been able to run 52% front 48% rear with no more than 30 lbs. out at any one corner, most of the time we have been within 10 on the corners. And yes it can be a trick if your car weighs 5200 lbs. like ours does! Good luck and have fun!
Mike LeFevers
Car 265
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Kevin, you did not say whether you were going to take advantage of all the rules allowed for running in the Altered/Fuel coupe class. Placement of the engine is paramount to proper weight distribution (25% setback). Gas Coupes and Production cars do not have that luxury. ie: adding more rear weight to balence the car. My contention has always been to weigh 10 pounds more total weight than needed and be balenced too. Hard to do with a roadster much easier with an Altered coupe. Good luck J.D.