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QuarterMaster's Lightweight Driveshaft Replacement

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Old Jun 17, 2008 | 07:51 PM
  #76  
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nice so that would be like losing 58lbs in your wheels!!

Think about having an ultra light driveshaft, and lighter wheels.

I bet you would seriously pick up 20-30whp with those mods.

Quoted from the webpage: "Our driveshaft shaves off an amazing 14.5lbs of rotating weight from the stock driveshaft."
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Old Jun 17, 2008 | 07:54 PM
  #77  
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From: Chicagoland
Originally Posted by Spaceball 1
Weight savings on something like a driveshaft are great even if the weight saved is very small.

The drive shaft spins roughly 4 times faster than your wheels, so if you take out 1 lbs of rotating weight from the drive shaft it would be like taking 1 pound off each wheel.
This is not accurate. Weight is a factor but the diameter at which the weight is removed or added is more critical. One pound removed from the outside of a wheel will affect the moment of inertia a LOT more than one pound removed from the center of a wheel.

A drive shaft of the same weight but larger in diameter will have a larger moment of inertia and will essentially rob power. Enough difference in diameter, and even a lighter drive shaft that is larger in diameter can sap more power.
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Old Jun 17, 2008 | 08:20 PM
  #78  
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so this piece will make the car feel quicker and more responsive? but does not create hp correct?
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Old Jun 17, 2008 | 08:54 PM
  #79  
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9sec240

Good point.

Well now my next question is what is stock diameter and what is the diameter of this lighter drive shaft?? Lol
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Old Jun 17, 2008 | 09:04 PM
  #80  
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Originally Posted by max2evoix
so this piece will make the car feel quicker and more responsive? but does not create hp correct?
Answer this.
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Old Jun 17, 2008 | 09:12 PM
  #81  
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Yes. It does not add power but it does. Lol. If I am right on simple terms lets say ur car makes 50hp. But take 25hp to get it going. Now with lighter rotational parts it will only take 15hp to get it going.... basicly it takes less to get the car going so it will go faster sooner and be much more responsive.
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Old Jun 17, 2008 | 09:16 PM
  #82  
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From: MA
Originally Posted by 4G63 T
Answer this.
removing parasitic drive train loss should increase power to the wheels. the same as using smaller wheels.
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Old Jun 17, 2008 | 09:53 PM
  #83  
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I'd like to see some actual testing done... I mean dyno testing....
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Old Jun 17, 2008 | 10:02 PM
  #84  
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Well. Maybe ill just do that. I'm calling them tomorrow.
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Old Jun 18, 2008 | 01:57 AM
  #85  
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damn thats cheap.... cheaper than my cossi cams!
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Old Jun 18, 2008 | 08:12 AM
  #86  
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Originally Posted by red evo8
damn thats cheap.... cheaper than my cossi cams!
Yeah but cams are plenty fun and my next mod .
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Old Jun 18, 2008 | 08:19 AM
  #87  
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All in all this is a great product by Adam and his team. Devo is a place not alot of people know about but this might help get the name out. Now all Devo has to do is become a vendor on here and share there great knowledge and products with the evom community.
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Old Jun 18, 2008 | 09:11 AM
  #88  
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For all teh noobs....do you know why your car was listed at the dealer having 281hp and when you hit the dyno its at 230???

It's a thing called drivetrain friction loss. In the process of transmitting the power from the motor to the transmission, to the wheels - power is lost because metal is touching metal and gravity etc.....so your motor essentially gets dragged down.....

a lighter driveshaft in theory should reduce the amount of power lost so maybe now your could make 245 because there is less weight, which causes less friction and less drivetrain friction loss.

So it should free up some power that you already have in your car that is getting sucked by friction. So will it "add" power? I guess that is all in how you think about it. You can say it adds power, but moreso it gives you back power that is being robbed from you. You should see gains on the dyno, since that measures power at the wheel.
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Old Jun 18, 2008 | 11:06 AM
  #89  
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when is someone gonna answer my question?!?!


will it fit a Gawd damn JDM EVO 7 GSR W/ AYC !!?
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Old Jun 18, 2008 | 11:32 AM
  #90  
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From: Mass
Originally Posted by 11secEVO7
when is someone gonna answer my question?!?!


will it fit a Gawd damn JDM EVO 7 GSR W/ AYC !!?
Calm down, people are still figuring out if it would gain hp, and what parts are saving weight and which is static and which is rotational. It's hard enough to get those answers, so thats probably why you didn't get your answer.
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