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Cars > Groups > United States Muscle Car Federation > Forums > Technical Q&A > Roller question

 

Forum: Technical Q&A

  • Topic: Roller question
  • Started by FordFanboi May 29, 2007 at 4:34 pm
  • Last post by FordFanboi May 30, 2007 at 9:13 am
  • This topic has been viewed 516 times and has 11 replies
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Topic: Roller question

Forums > Technical Q&A > Roller question

Page 2 of 2: << First < 1 2 Posts 11 – 13 of 13  

  1. #11 May 29, 2007 at 4:34 pm

    FordFanboi’s Profile Photo
    FordFanboi
    Total posts: 51
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    I run a mech. roller on the street daily, and it's the valvetrain noise that gets to ya.

    Duration adv int/exh (0.050 int/exh): 285/292 (254/260)
    Gross lift int/exh: 0.597/0.578
    Lobe Separation: 106

    The car performs just fine in traffic, but you can hear the valvetrain when idling more than anything. At least you know when it's time to reset the lash. biggrin image

    I ran hydraulic once, and the performance fluctuation I saw on a hot vs cold motor made me swear them off. The lifters just don't pump up as well when hot, which is just another performance degredation due to heat... much like intake air temps. If you can deal with the noise and occasional adjustment ( the locking nuts almost eliminate the need ) then go mechanical IMO.
     

     

    1966 408ci EFI Ford Mustang Coupe-Vertible
    Click HERE to vote on my challenges - thanks!
  2. #12 May 30, 2007 at 6:37 am

    Randy_W’s Profile Photo
    Randy_W
    Total posts: 39
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    Quote:
    ( the locking nuts almost eliminate the need )


    It's actually wear that requires periodic adjustment, I've never seen any kind of adjustable valvetrain without locking nuts of some sort. Roller setups don't wear nearly as fast as flat tappets so they generally require fewer adjustments. My old Hemi needed valve adjustments at 2000-3000 miles for optimal performance although the book called for 10,000 mile adjustments, by then a good running bread truck would beat me! biggrin image
     

     

    Randy_W
    Shore boy with noisy toys!

    Edited May 30, 2007 at 6:40 am

  3. #13 May 30, 2007 at 9:13 am

    FordFanboi’s Profile Photo
    FordFanboi
    Total posts: 51
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    Quote:
    Originally posted by Randy_W  It's actually wear that requires periodic adjustment, I've never seen any kind of adjustable valvetrain without locking nuts of some sort. Roller setups don't wear nearly as fast as flat tappets so they generally require fewer adjustments. My old Hemi needed valve adjustments at 2000-3000 miles for optimal performance although the book called for 10,000 mile adjustments, by then a good running bread truck would beat me! biggrin image


    I'm talking about poly locks. wink image The stock nuts on my '66 just had some flexible compound inside the nut, and some would back off in under 100 miles. The poly locks don't move as opposed to stock nuts which wander like a toddler. heh Of course, the original poster would need to pick up poly locks if he didn't already have them. I couldn't imagine dealing with my valvetrain without them!
     

     

    1966 408ci EFI Ford Mustang Coupe-Vertible
    Click HERE to vote on my challenges - thanks!

    Edited May 30, 2007 at 9:17 am

Page 2 of 2: << First < 1 2 Posts 11 – 13 of 13  

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