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Bracket Talk Bracket Talk Forum BRACKET TALK - "Get on Board" Tech Talk Rotating weight|
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DRR Sportsman |
How would I figure out a decrease of say 7 pounds of rotating weight to normal weight. I hear alot of talk about " Ya but that's rotating weight" . Is there a formula to determine the difference?
Lets say I have different axles and they weigh 3.7 pounds a piece lighter.... What does that do overall for me? Ryan Smith |
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DRR Trophy |
I think the further from the axis the weight is, the bigger the effect. An axle may not make as much of a difference as a lighter wheel. Think Napoleon Dynamite and the tether ball. Shorter rope / same ball / not as resistant to spinning easily.
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DRR Sportsman |
dont know if "the law" but stockers claim its 5 lbs per 1 lb rotating weight
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DRR Sportsman |
Just spray that thing and stop making it rocket science
 SP... Please see Wanted section for Rhino's new ad for wind tunnel time. Return to the Championship 2010  V's House of Horse Power 216-256-5362 The Fab Shop http://www.fabshopheaders.com/ Race Tech Race Cars http://www.racetechracecars.com/ Vickers Transmissions 330-584-3679 Live life like a dog; if you can't eat it or hump it, piss on it and walk away. |
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DRR Sportsman |
Thanks Pink, I'll run that by the Govenor ...  Ryan Smith |
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DRR Sportsman |
So...my drag radials are 14 lbs each heavier than my slicks. Using the formula above its like adding 140 lbs to the car?
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DRR Sportsman |
Don't pick on rhino.... he's busy scraping all the paint of the body to get ready for the wind tunnel.
Ryan Fasano  |
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DRR Sportsman |
yes,,,but remember that most radials are .10 quicker... here is a scenerio,,,,I had 32 x 14.5W goodyears,,changed to 31.x 13.5 sodt sidewall hoosiers......the goodyears were about 20lbs heaver counting the difference in a 14 and 12 rim......height measured about the same due to the rim size......section width is nearly 4 inches different.....hoosiers are .15 quicker and 1.5mph faster in the 1/8......nearly NO DIFFERENCE in 60ft,,,,maybe .01 if any,,,,its all after she gets rolling as an opinion,,,I wouldnt thing that the cost vs et would justify buying axles...even though it is rotating weight,,,,,there would be better spent money on other items unless thats the last place you can loose rotating weight,,,,,, if your looking for et,,,big gains are found in oil winnage,,,rims/tires///gears in the rear fitting correctly,,,gains in exhaust vs jetting/timing are cheap.... I had a set of stock alum rims and tires on a stocker,,,,I order a set of bogarts that weighed maybe 7 lbs with tires mounted,,,,.30 tenths !!!,,,gains in rotating weight show up the best in lower HP combos |
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DRR Sportsman |
Well, if Arnold can have California.....  Return to the Championship 2010 V's House of Horse Power 216-256-5362 The Fab Shop http://www.fabshopheaders.com/ Race Tech Race Cars http://www.racetechracecars.com/ Vickers Transmissions 330-584-3679 Live life like a dog; if you can't eat it or hump it, piss on it and walk away. |
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DRR Trophy |
The best way to cut down on rotating weight is to not turn your head (looking for your opponent)while going down the track!
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DRR Sportsman |
I run 30x9 Hoosier radial slicks normally so it would comparing drag radials to radial slicks. I like to keep a set of both on hand so I can run street legal events. I didnt want the slicks sitting around all winter so I went with drag radials to finish the season and apparently it is showing up on the timeslip 
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