What DriveShaft to get?
03-21-2007, 01:19 PM
#23
1st Gear Member
Join Date: Jul 2006
Location:
Posts: 78
RE: What DriveShaft to get?
ORIGINAL: CrazyAl
That is the same weight as the Powerhouse/Spyder shaft.
That is the same weight as the Powerhouse/Spyder shaft.
03-22-2007, 01:20 AM
#24
4th Gear Member
Join Date: Oct 2005
Location:
Posts: 1,189
RE: What DriveShaft to get?
i did a before and after test on the same day and gained .21 seconds 1/4 mile with .11 gained in the first 60' and almost .20 in the 1/8th mile.
thereare no questions.they arequicker. and you will feel the difference as soon as you hit the throttle.
thereare no questions.they arequicker. and you will feel the difference as soon as you hit the throttle.
03-22-2007, 02:27 AM
#25
3rd Gear Member
Join Date: Aug 2005
Location: New Braunfels, TX
Posts: 882
RE: What DriveShaft to get?
ORIGINAL: spyder7724
i did a before and after test on the same day and gained .21 seconds 1/4 mile with .11 gained in the first 60' and almost .20 in the 1/8th mile.
thereare no questions.they arequicker. and you will feel the difference as soon as you hit the throttle.
i did a before and after test on the same day and gained .21 seconds 1/4 mile with .11 gained in the first 60' and almost .20 in the 1/8th mile.
thereare no questions.they arequicker. and you will feel the difference as soon as you hit the throttle.
03-23-2007, 02:41 PM
#27
2nd Gear Member
Join Date: Aug 2005
Location:
Posts: 454
RE: What DriveShaft to get?
Look Ma!!! A perfect example of why I stayed with Comp Sci, and stayed away from Mechanical, Materials, Chemical, etc. engineering...That mathmakes my head hurt...
First you would have to know the exact thickness of the driveshaft walls, but if you assumed all the weight of thedriveshaft was at the outer edge the rotational moment of inertial is found by this equation: I = m r^2 where m is the mass and r is the radius from the center.
So we ideally would want both moments of inertia to be the same so we would have:
I(steel) = I(aluminum)
or m(steel) * radius^2 = m(aluminum) * radius^2
we know the radus of the two DS so
m(steel) * (3)^2 = m(aluminum)*(4)^2
m(steel)* 9 = m (aluminum) * 16
m(aluminum) = (9 * m(steel))/ 16
we know the mass of the steel drive shaft is 23 lbs
m (aluminum) = ( 9 * 23 )/16 = 12.93 lbs
So we ideally would want both moments of inertia to be the same so we would have:
I(steel) = I(aluminum)
or m(steel) * radius^2 = m(aluminum) * radius^2
we know the radus of the two DS so
m(steel) * (3)^2 = m(aluminum)*(4)^2
m(steel)* 9 = m (aluminum) * 16
m(aluminum) = (9 * m(steel))/ 16
we know the mass of the steel drive shaft is 23 lbs
m (aluminum) = ( 9 * 23 )/16 = 12.93 lbs
03-24-2007, 07:15 PM
#28
5th Gear Member
Join Date: Jan 2006
Location: Florida
Posts: 2,398
RE: What DriveShaft to get?
Just out of curiosity, how would the driveshafts rate? I mean... Best to worst, and I'm not talking about this one costs more then that one. Depending on materials used, diameter, etc... Who is the best, and who is the worst?
03-24-2007, 08:09 PM
#29
RE: What DriveShaft to get?
http://www.cherod.com/mustang/HowTo/...riveshaft.html
This provides some general info....you can do some calculations to find more.
This provides some general info....you can do some calculations to find more.
03-24-2007, 09:18 PM
#30
5th Gear Member
Join Date: Jan 2006
Location: Florida
Posts: 2,398
RE: What DriveShaft to get?
I've read that before, doesn't exactly help.
All I want to know, is if the overall performance of the driveshaft. Will a 3" be better then a 4" despite the small difference in weight? Is the lighter the better, no matter the diameter of the shaft? etc. With too much concern being put on price, and with that out of the way, I just want to know what's best and then I'll be able to judge accordingly.
All I want to know, is if the overall performance of the driveshaft. Will a 3" be better then a 4" despite the small difference in weight? Is the lighter the better, no matter the diameter of the shaft? etc. With too much concern being put on price, and with that out of the way, I just want to know what's best and then I'll be able to judge accordingly.