Manthey Motors M600 997 GT2 and Unsprung weight math....
05-20-09, 05:53 PM
#1
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Manthey Motors M600 997 GT2 and Unsprung weight math....
I'm reading on my of Excellence mags (June 09) and they test the Manthey Motors M600 997 GT2
The car has 19x9 and 19x 11.5 BBS Motorsport MM2 magnesium alloy wheels. What makes these extra special is BBS makes road wheels but BBS Motorsport WILL NOT make road wheels for anyone but Manthey.
Olef Manthey (google is your friend, he is a Porsche god) -"removing 33 lbs of unsprung weight at the wheels is equivilent to losing 198 lbs from the body of the car, as a 1:6 factor has to be applied when the car is movingand that weight becomes mass. In fact we are conservative as Porsche considers it to be 1:7". ( I am sure some knew this forumla but I did not)
The car is 88 lbs lighter than the stock GT2 which weighs 3175 lbs. The car makes 594hp instead of the stock 530hp.
I'll post pics later
The car has 19x9 and 19x 11.5 BBS Motorsport MM2 magnesium alloy wheels. What makes these extra special is BBS makes road wheels but BBS Motorsport WILL NOT make road wheels for anyone but Manthey.
Olef Manthey (google is your friend, he is a Porsche god) -"removing 33 lbs of unsprung weight at the wheels is equivilent to losing 198 lbs from the body of the car, as a 1:6 factor has to be applied when the car is movingand that weight becomes mass. In fact we are conservative as Porsche considers it to be 1:7". ( I am sure some knew this forumla but I did not)
The car is 88 lbs lighter than the stock GT2 which weighs 3175 lbs. The car makes 594hp instead of the stock 530hp.
I'll post pics later
05-20-09, 07:40 PM
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05-20-09, 09:58 PM
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Nice Porsche! That "math" is a myth btw. Just cuz he's a Porsche god doesn't mean what he says is true. There are plenty of real world tests that show that wheel rigidity is just as important, if not more important than wheel weight.
Here's a recent article on modified magazine.. They don't show the head-to-head chart online, but it's a good read. You can read the conclusion on the last page. There were no discernible track time differences.
http://www.modified.com/tech/modp-09...ter/index.html
I also read a Japanese mag recently where they used a pro race car driver to do a back-to-back test with two exact wheels, one which is lightened through some manufacturing process. The heavier wheel yielded a faster track time.
Here's a recent article on modified magazine.. They don't show the head-to-head chart online, but it's a good read. You can read the conclusion on the last page. There were no discernible track time differences.
http://www.modified.com/tech/modp-09...ter/index.html
I also read a Japanese mag recently where they used a pro race car driver to do a back-to-back test with two exact wheels, one which is lightened through some manufacturing process. The heavier wheel yielded a faster track time.
05-20-09, 10:57 PM
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Nice Porsche! That "math" is a myth btw. Just cuz he's a Porsche god doesn't mean what he says is true. There are plenty of real world tests that show that wheel rigidity is just as important, if not more important than wheel weight.
Here's a recent article on modified magazine.. They don't show the head-to-head chart online, but it's a good read. You can read the conclusion on the last page. There were no discernible track time differences.
http://www.modified.com/tech/modp-09...ter/index.html
I also read a Japanese mag recently where they used a pro race car driver to do a back-to-back test with two exact wheels, one which is lightened through some manufacturing process. The heavier wheel yielded a faster track time.
Here's a recent article on modified magazine.. They don't show the head-to-head chart online, but it's a good read. You can read the conclusion on the last page. There were no discernible track time differences.
http://www.modified.com/tech/modp-09...ter/index.html
I also read a Japanese mag recently where they used a pro race car driver to do a back-to-back test with two exact wheels, one which is lightened through some manufacturing process. The heavier wheel yielded a faster track time.
Good information on the links you provided. Although in their tests the weight difference between their lightest wheel and heaviest is only 3 lbs. hardly any difference there. I think the tests would be more meanfull if the difference is 10-15 lbs more.
05-21-09, 06:26 AM
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for that fateful day of ownership I also love Total 911 and have gotten it since issue 1. Nice Porsche! That "math" is a myth btw. Just cuz he's a Porsche god doesn't mean what he says is true. There are plenty of real world tests that show that wheel rigidity is just as important, if not more important than wheel weight.
Here's a recent article on modified magazine.. They don't show the head-to-head chart online, but it's a good read. You can read the conclusion on the last page. There were no discernible track time differences.
http://www.modified.com/tech/modp-09...ter/index.html
I also read a Japanese mag recently where they used a pro race car driver to do a back-to-back test with two exact wheels, one which is lightened through some manufacturing process. The heavier wheel yielded a faster track time.
Here's a recent article on modified magazine.. They don't show the head-to-head chart online, but it's a good read. You can read the conclusion on the last page. There were no discernible track time differences.
http://www.modified.com/tech/modp-09...ter/index.html
I also read a Japanese mag recently where they used a pro race car driver to do a back-to-back test with two exact wheels, one which is lightened through some manufacturing process. The heavier wheel yielded a faster track time.
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