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#1 |
VIP Member
Join Date: Jul 2007
Location: Anthem, Arizona
Posts: 2,766
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And I'll bet a 'Vette has a pretty short length drive shaft w/ a 97" WB so it's hard to compare to the average 108"-112" WB.
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Jeff Lee 7494 D/S '70 AMX |
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#2 |
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Join Date: Jan 2005
Location: Lake Tapps, Washington
Posts: 137
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Jeff; Not wishing to appear ignorant in the eyes of a guy who claims to be able to make a Rambler aproach warp speed in 1320ft I will admit to having a "short shaft". That being said; I ran an aluminum unit it my 90 Camaro as well with the same end result. I have heard ET gains of up to a tenth with aluminum driveshafts so perhaps you are correct to say that it probably has a lot to do with combinations: a clutch, manual trans and a "short stroke" It makes sense to me that all these guys didnt imagine the performance gains. Any component that reduces rotational mass or unsprung weight is worth consideration in my book and dont feel like the Lone Ranger if you have lost your "budget"; most of us suffer from the very same affliction. Agreeing with Jeff Lee??? Not bad, I do feel.............well.........a little slutty, but a shower will probably help. TT
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#3 |
Junior Member
Join Date: Aug 2007
Location: Olympia, WA
Posts: 68
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I am just a bracket racer but this subject has always interested me. I have a 65 Comet with a 351C and a 4 speed with a 5:14 gear and a M/T 28x9 tire. I used a 3 1/2" .065 mild steel shaft for over 20 years with no problems. I accidently damaged by denting it so it was time for a replacement. It is 57" center to center.
I called Mark Williams first and they said that according to there critical speed chart I needed a 4" aluminum or carbon fiber shaft. This is a mid 11 second car. I then called Inland Empire, PST, and several others and I had no two shops agree and what is required. I looked at several critical speed charts online and Mark Williams seemed the most conservative. I ended up with a 3" Strange chrome moly but I still like the idea of an aluminum shaft. It seems like a good place to loose some rotational weight. I really enjoy your site and I am anxious to see the results of this thread. Brian |
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