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 »  Home  »  Product Reviews  »  Subaru  »  Impreza (RS, WRX, STI)  »  Engine / Power  »  Searching for a Lightweight One-Piece Driveshaft.
Searching for a Lightweight One-Piece Driveshaft.
By Michael Anthony | Published  10/24/2005 | Engine / Power | Rating:
A Lightweight Driveshaft for a Performance Enhancement:

Naturally, the STI comes from the factory with a two-piece Driveshaft. 
Knowing full well that a lightweight one-piece unit would have greater performance benefits compared to a heavier two-piece, the miserable factory Driveshaft would have to go!
It was imperative that I find an excellent and lightweight ONE-piece Driveshaft for my STi.

Now, the heavy two-piece Driveshaft has two steel shafts joined together by a center bearing. This center bearing is bolted to the floorboard between the two steels shafts.
One steel shaft is bolted to the rear differential while the other slides into the rear of the STi’s slick shifting six-speed transmission.

Really, there is nothing terribly wrong with the two-piece Driveshaft design. However, research has proven that a well designed one-piece Driveshaft can deliver more performance and less weight.

Pages: « Back 1 2 3 4 5 6 7 Next » 
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Comments
  • Comment #1 (Posted by an unknown user)
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    Very good write up. Thanks
     
  • Comment #2 (Posted by an unknown user)
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    good stuff man.
     
  • Comment #3 (Posted by an unknown user)
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    Great write up, I am definately buying one of the as soon as I have the money. Thanks for saving me the painfull research of trying to find this almost "fable-like" part.
     
  • Comment #4 (Posted by an unknown user)
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    ACPT always strives to exceed customer's expectations. We had an advantage with the STi driveshaft development project because one of our employees (Driveshaft Product Manager) owns a 2005 STi and he was the guinea pig for development. He noticed the same performance gains you did, but also one more you didn't mention. The car stops (decelerates) much quicker when downshifting, perhaps anothe safety feature worth mentioning. Thanks for the good review!
     
  • Comment #5 (Posted by an unknown user)
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    I only wonder what the light ones would gain you also would the 500 dollar unit be the better trade off.
     
  • Comment #6 (Posted by an unknown user)
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    My STI eagerly recieved one of the first units and has yet to be damaged even with repeated abuse, Such as the dccd set 80 rear with 400 wheel horsepower
     
  • Comment #7 (Posted by an unknown user)
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    Are you still happy with this drive shaft And what modifications were done to your car before the installation
     
  • Comment #8 (Posted by an unknown user)
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    Excellent write up, i know where my next thousand bucks is going!


    -Zrex
     
  • Comment #9 (Posted by an unknown user)
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    Great review!
     
  • Comment #10 (Posted by an unknown user)
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    normally i wouldn't have read an article this long about a drive shaft buy you told a great story. kudos
     
  • Comment #11 (Posted by an unknown user)
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    Excellent write-up!! I want a C/F driveshaft now :)
     
  • Comment #12 (Posted by an unknown user)
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    must... resist... temptation... to... impulse... buy...
     
  • Comment #13 (Posted by bynddrvn)
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    Very interesting and informative article. Normally, I would not have thought about replacing the driveshaft as one of my modifications, but you make some great points. There is a lot of HP that is lost from the engine to the wheels and anything we can do to "put the power to the wheels" is a wicked awesome mod in my book.
     
  • Comment #14 (Posted by Dan)
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    I have actually recently purchased a composite shaft from CTG TORQline in the UK. I can quote that no modifications were required to the floorboard of the vehicle.

    The propshaft looks great and and can definately notice some performance increases, throttle response and decelleration seem much better.

    These guys are involved with many of the top end GT teams around the world. I reckon the part will whandle my mere 500bhp no problem!
     
  • Comment #15 (Posted by an unknown user)
    Rating
    Great write up, I always wondered if replacing the driveshaft would be worth it. Sounds like a lighter driveshaft is the way to go!
     
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