Bruno
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« on: April 29, 2009, 10:54:41 AM » |
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so I want to add some lead to the front, and rear of my 1990 corvette, in regard to the rear where is the best place to locate the ballast ? in front or behind the rear axle? The easyest place is behind the rear axle, just not sure one would want the weight that far aft?
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panic
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« Reply #1 on: April 29, 2009, 11:25:30 AM » |
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Thanks for not reading this.
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« Last Edit: April 30, 2009, 09:18:33 AM by panic »
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SPARKY
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« Reply #2 on: April 29, 2009, 12:37:27 PM » |
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Before I added any weight to any car ( I would put in on race car scales) but especially a Corvette----I would talk to someone is is running a similar car---some have NOTORIOUS lift
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" I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The great point is to bring them the real facts." A. Lincoln
agendadocumentary.com
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Bruno
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« Reply #3 on: April 29, 2009, 01:58:49 PM » |
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I am primarly concerned about traction,
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McRat
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Diesel Hotrodder
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« Reply #4 on: April 29, 2009, 02:03:47 PM » |
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1 pound after the axle will give you more than 1 lb worth of traction. Say wheelbase is 10 ft. Put 100 lb at 2 feet after the axle, it puts 120lb weight on the rear tires, and removes 20 lb from the front tires.
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Pat and Kat McSwain - DT 1616 "Casper" 2005 GMC 2500HD Sierra 4x4 Duramax Diesel + Allison Transmission B/DT & A/DT record holder, El Mirage (163) & Bonneville (175) Best clocking 197.068 mph - Bonneville '09, 2.25mi www.duramaxdiesels.com |
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interested bystander
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« Reply #5 on: April 29, 2009, 11:25:44 PM » |
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Other than putting it LOW, this brings up the topic of POLAR MOMENT OF INERTIA regards where to locate weight in the North and South diections.
I'm curious as to knowledgable Landspeed racers opinions on Elmo vs Bonnevile as to high? or low?
Are the two venues different. I.E. driving El Mirage you may need to be a sprint car driver therefore low polar moment, but Bonneville, accelerating over several miles, ya might want a stabilizing high polar moment. You're both times trying to defeat the Spin Gods, but does it take a differnt approach??!!!
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5 mph in pit area (clothed)
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Stainless1
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Robert W. P. "Stainless" Steele Wichita, Kansas
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« Reply #6 on: April 30, 2009, 09:11:24 AM » |
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Why not run it without any or minimal weight to start, after you weight it and know what the corners are doing. Then you can see how it feels. Make and take provisions for adding weight... Think about frame torque from the motor when you start to add weight. You may not want the weight balanced... Or just add a bellypan made of 3/8 to 1/2 inch steel and go racing...  |
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Stainless
MSA Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.
Builder of Bike 278 1000cc APS-G, Kids Red Hat Record 208.959 (old PS rules)
Other kids A-G record 179.172 Josh O record 182.266
Co-owner of the Amo Steele Streamliner, #1411... still sorting
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sabat
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« Reply #7 on: April 30, 2009, 10:38:06 AM » |
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Thanks for not reading this.
Why do you do this? |
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ECTA, LTA, Texas, and Bonneville 200 clubs
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SPARKY
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« Reply #8 on: April 30, 2009, 05:27:08 PM » |
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 BPD?
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" I am a firm believer in the people. If given the truth, they can be depended upon to meet any national crisis. The great point is to bring them the real facts." A. Lincoln
agendadocumentary.com
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McRat
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« Reply #9 on: April 30, 2009, 05:55:40 PM » |
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I'd have to say you should always add weight to the car instead of the driver. If I don't lose some weight, I'll have to use Crisco to get my firesuit on.   To avoid spinning, I'd say always keep as much weight as possible between the tires, and keep the nose heavier than the rear, but I'm just guessing at that. "Outboard" tires would have the most "leverage" against the weight of the car to resist spinning, and a heavy nose will naturally try to go into the wind. |
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Pat and Kat McSwain - DT 1616 "Casper" 2005 GMC 2500HD Sierra 4x4 Duramax Diesel + Allison Transmission B/DT & A/DT record holder, El Mirage (163) & Bonneville (175) Best clocking 197.068 mph - Bonneville '09, 2.25mi www.duramaxdiesels.com |
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