02-13-2015, 01:47 PM | #15 | |
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The biggest change you will see, and I'm surprised no one mentioned this yet, is that it makes heel-toe shifting SIGNIFICANTLY easier, saving some wear and tear on your gearbox over time. That said you will notice an increase in NVH, with the rubbing noise some others have described, and you may also feel a pulse through the gas pedal when the diff kicks in that the stock shaft kept muted. Interestingly after going through some winters with both units, the factory one was developing small surface rust spots in a few areas, whereas the aluminum one for obvious reasons still looks fresh as a daisy. I'd be more worried about a factory one becoming unbalanced and damaging the gearbox over time in harsher climates than I would be about the aluminum one doing any harm. Overall I'd say its a pretty effective cheap mod, if you're willing to work on your driving technique enough to take advantage of it.
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02-13-2015, 01:51 PM | #16 |
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Reducing the weight of engine driven parts is always going to benefit straight line acceleration. Will it always be noticeable? No.
I don't want the NVH and driveline wear that comes with longer driveshafts. You kids have at it though! |
02-13-2015, 01:55 PM | #17 | |
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02-13-2015, 03:01 PM | #18 | |
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http://www.stangnet.com/mustang-foru...weight.789990/ http://www.hpwizard.com/rotational-inertia.html
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02-13-2015, 04:25 PM | #19 | |
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Sorry, but I will not accept - "You are wrong go read some stuff that proves it" Cant you answer the "what do you think?" as it applies to the question? Point out where I am wrong and then explain where I can find an explanation where I am wrong. Physics is on my side (something I excel at). I am not saying that reducing rotational mass does nothing, just that reducing the mass of certain items is below the threshold of detection of our "butt dynos". EDIT - OK I read the second link. THANK YOU for making my point for me. In the example for driveshaft & half shafts, the author and the calculator explain that the "mass ratio" (equivalent vehicle mass compared to rotational mass) is.... wait for it..... wait for it.... 1.01 = which in my book is approximately ONE. So as I said - removing 1 pound from the driveshaft is the SAME as removing one pound from anywhere else on the car. Last edited by stugray; 02-13-2015 at 04:37 PM. |
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02-13-2015, 05:41 PM | #20 |
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And everyone ignores the elephant in the room, driveshaft critical speed.
Look it up, the math is easy. |
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02-13-2015, 07:23 PM | #21 |
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I have the axle exch alum ne because it was faster than the drive shaft shop.
No other reason. Im pretty sure they are both almost identical. I personally stay away from carbon stuff because they are more fragile, etc.. If you have an exhaust leak, you are much more likely to damage a carbon one than an alum one. For a race car, I will take reliability over outright performance. To a point, of course D |
02-13-2015, 07:40 PM | #22 | |
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02-13-2015, 08:28 PM | #23 |
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That might be the lowest price yet I have seen for a DS.
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02-14-2015, 12:52 AM | #24 |
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The biggest difference with the 1 piece driveshaft is the way the car reacts to throttle input. Once you drive one with a 1 piece, you will realize that you can no longer feel the delay when the center joint is loaded/unloaded. There is an immediacy to throttle inputs that is absent in the OEM 2 piece.
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02-14-2015, 02:19 AM | #25 |
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So no input on whether the one piece drive shafts causes any premature wear on any parts?
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02-14-2015, 03:23 AM | #26 | |
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The center joint has nothing to do with this... The driveshaft more likely has a bonded section in one of the shaft pieces. Eliminating that would achieve the same feel. I'm waiting for someone to make a light weight 2-piece... |
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02-14-2015, 08:20 AM | #27 |
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Seen the dss one before: wrong position of the counter weights, bad weldings . Looks cheap Chinese made!
Removing weight off the driveshaft will reduce the rotational mass= engine will get to high rpm quicker. Same as the crankshaft pulley. Look up the Grimmspeed research on lightweight weight pulley! |
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02-14-2015, 09:56 AM | #28 | |
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The only reason steel was used in the first place is its cheap and does a good job dampening nvh in a car that already has a pretty thin interior sound wise.
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