light pulleys from UR (unorthodox racing) - Page 2
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View Poll Results: Interested in UR pulleys?

Voters
15. You may not vote on this poll
  • lightweight crank (OE size) only

    4 26.67%
  • accessory pulleys only

    0 0%
  • accessory + crank pulleys

    3 20.00%
  • no

    6 40.00%
  • try again in a few months

    2 13.33%
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Thread: light pulleys from UR (unorthodox racing)

  1. #11
    1st Gear 20131pz69's Avatar
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    Quote Originally Posted by NBrehm View Post
    Be careful with lightweight pullies, Most vehicles have the heavy pulley to dampen the harmonic vibration the engine causes (Harmonic balancer). While they free up some ponies they also cause more wear and tear on the motor which will reduce engine life. Some made by Fluidamper or from ATI will keep the balance correct. It isn't going to cause engine failure or anything like that, but just file it in the memory banks if you do it that you may shorten the service life of the engine
    Good point! There are 2 scenarios, I believe:
    i. there's a harmonic balancer separate from the crank pulley. In that case there is no issue, as long as that is kept
    ii. It's built in to the pulley, in which case I would not want to do this mod

    ^ anyone know which is true for the cruze???
    2013 Cyber Gray/ black 2LT 6M RS. stage 0 tune for 91 octane- vtuner

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  3. #12
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    Quote Originally Posted by 20131pz69 View Post
    Good point! There are 2 scenarios, I believe:
    i. there's a harmonic balancer separate from the crank pulley. In that case there is no issue, as long as that is kept
    ii. It's built in to the pulley, in which case I would not want to do this mod

    ^ anyone know which is true for the cruze???
    2011 CHEVROLET CRUZE Harmonic Balancer
    2012 Cruze 1LT 6M


  4. #13
    Drag Champion jakkaroo's Avatar
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    http://www.cruzetalk.com/forum/9-che...ht-pulley.html should have done a search before posting a new thread

  5. #14
    Handbrake Released Markj2222's Avatar
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    A friend of mine who i raced with lightened up his flywheel/pullies (Mazda) , now he can't shift with the A/C on. When he opens the clutch the engine drops to idle like a rock.

    I like to run time trials, I do not believe this will help. I would go for a solid engine mounts and lighter flywheel / clutch if i wanted a few tenths.
    2012 Chevrolet Cruze LT Manual 6
    Mods: Trifecta Tune ~22 PSI, 8-11 *Timing advance , 12:1 AFR
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    Next: Brakes that work...

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    Wont rest until i reach 200 WHP

  6. #15
    World Rally Champion
    H3LLON3ARTH's Avatar
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    Quote Originally Posted by Markj2222 View Post
    A friend of mine who i raced with lightened up his flywheel/pullies (Mazda) , now he can't shift with the A/C on. When he opens the clutch the engine drops to idle like a rock.

    I like to run time trials, I do not believe this will help. I would go for a solid engine mounts and lighter flywheel / clutch if i wanted a few tenths.
    Were do you run tt at I'm just doing autocross and would love to do this also.

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  7. #16
    1st Gear 20131pz69's Avatar
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    Quote Originally Posted by jakkaroo View Post
    http://www.cruzetalk.com/forum/9-che...ht-pulley.html should have done a search before posting a new thread
    sorry bro! Not sure how I missed that ...
    2013 Cyber Gray/ black 2LT 6M RS. stage 0 tune for 91 octane- vtuner

  8. #17
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    tecollins1's Avatar
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    Quote Originally Posted by jakkaroo View Post
    http://www.cruzetalk.com/forum/9-che...ht-pulley.html should have done a search before posting a new thread
    It's from 2011 and didn't have a poll. So I don't see a reason why he shouldn't have.
    IMO


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  9. #18
    Drag Champion jakkaroo's Avatar
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    Quote Originally Posted by tecollins1 View Post
    It's from 2011 and didn't have a poll. So I don't see a reason why he shouldn't have.
    IMO


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  10. #19
    Drag Champion jakkaroo's Avatar
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    Quote Originally Posted by 20131pz69 View Post
    sorry bro! Not sure how I missed that ...
    Haha its alright just busten chops.I wanted to get more support but back in 2011 nobody was interested

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  11. #20
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    Most of the time these light weight pulleys do have some increase in power, mostly due to the fact they change the size of the pulley from stock decreasing the load at any given RPM.

    By doing so that means things like your alternator are not putting out as much as normal at the same RPM, if your easy on your car that means it may not be charging enough at idle. With as many computers as the cruze has why risk it for 1-5hp at most?

    Lifetime: 10.5 cents per mile @ $3.73 average price over 56K miles

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