How can I tell a Harley cam from Andrews

Discussion in 'Engine, Fuel and Exhaust' started by buddyrm, Dec 16, 2009.

  1. buddyrm

    buddyrm New Member

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    I bought what I believed was a TW21 cam from a Ebay seller who swears its a new TW21 cam. It looks like a stock cam that was pulled from a stock TC88. Now I have never seen a stock cam because I have not opened my cam chest yet, how can I tell what cams I have? Identification marks etc...... Can anyone shed some light on how to identify a Harley stock cam from an andrews? Is there any distinctive markings? Any help would be appreciated?
     

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  2. Hoople

    Hoople Account Removed

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    I am guessing the lift should at least be greater. (?) Do you know what the lift of the cam should be? If you do, you could easily mount the cam in a set of V blocks and measure the lift.
     
  3. NEWHD74FAN

    NEWHD74FAN Experienced Member Retired Moderators

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    Andrews would be able to identy their cams, as HD would be able to identify theirs...may want to find out location of the makers' marks and hopefully they will be visible without pulling a lot of stuff, IF you don't have it all lying on the bench as pictured.

    BTW, part of the deal is most manufacturers have to have manufacturing marks, otherwise their patented designs would be stolen "literally" and no legal discourse. Intel did that with a batch of microprocessors...next thing you know major aftermarket makers came out legally with their copies of those mysterious unlabeled marvels of modern eh "cloned" technology. Needless to say Intel lost the law suit filings and the microprocessor was born....!
     
    Last edited: Dec 17, 2009
  4. Hoople

    Hoople Account Removed

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    The best way to know what was sent to you would be with the manufacturing marks like NewHD said earlier. That would be Proof positive.

    But I did learn the TW21 Andrews cam (part# 288121) does have a lift of .498 & .498

    The stock Harley Cam has a lift of .473

    If all else fails, that would be easy to measure. At least you would know if what was sold to you is other than stock.
     
  5. CatWoman

    CatWoman Active Member

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    On my Andrews EV 27 cam - it was printed on one of the ends (I think it was on the inner end). Something like 'Andrew EV 27' or maybe the Andrew's was abreviated.

    CatWoman
     
  6. kemo

    kemo R.I.P

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    Same here on my Andrews 26N cams. Marked on the inner end
    kemo
     
  7. Breeze3at

    Breeze3at Well-Known Member

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    It might be reflections or something else, but in the first two pictures, the bearing surface looks pretty well beat up.
     
  8. kemo

    kemo R.I.P

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    I was thinking that those marks could be smeared oil
    kemo
     
  9. Bud White

    Bud White Well-Known Member Retired Moderators

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    bearing surfaces look wore to me to
     
  10. R.Bingham

    R.Bingham Active Member

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    I hate to say it but those cams have the same marks as the stock cams that I just pulled out of my TC 88. The casting number is different but the marks on the ends are identical. Those cams are definitely used, not new. I hope the seller will make it right with you. I bought a used backrest last year that was damaged and the seller made it right. Hopefully yours will too.
    Good Luck