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Thread: SBC Small base roller cam question?????

  1. #1

    SBC Small base roller cam question?????

    I have a .900 base circle cam for my race motor I'm putting together and want to order some roller lifters. I was looking at cranes vertical bar and horizontal bar lifters. I was discussing it with a friend and he mentioned that the horizontal's won't work w/ the small base circle cam, if anyone truly knows please post. Thanks

  2. #2
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    A .900 base circle cam may need vertical bars, or may need taller lifters. I have an .850 in my 427 SB and had to go .300 tall on lifters, horizontals hit the block preventing the lifter from contacting the base circle.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
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    Good work isn't cheap, and cheap work can't be good.

  3. #3
    Senior Member MASTER BUILDER
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    What block are you using? If you are using the Dart or the Bowtie block then it will be tight, because I think they both use the 0.300 longer lifters. They sell roller lifters that are even longer for the short base circle cams $$$$. (I think that it was 450.00 for CompCams vertical bar lifters)

    I put an engine together with the Crane horizontal spring loaded lifters and the Dart block and the springs were compressed almost completely. It turned about 7300rpm's for two years without problems. You have to be careful about the lifter compressing completely against the link plate, but not touching the cam lobe, therefore giving you more valve lash than what the feeler gauge shows.

  4. #4
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    Exactly. I bought Howard +.300 from Competition Products, about $300.00 and no issues.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

    Good work isn't cheap, and cheap work can't be good.

  5. #5
    Junior Member SHOW GUEST
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    I've used the standard crane horizontal bar lifters in a standard block with a .900bc cam with no problems

    Scott

  6. #6
    Senior Member SENIOR BUILDER
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    I use stock height roller lifters on my 436 SBC with a 875 Base circle cam,with no problems,now I am using the lifters in my aluminum block with the same cam and no problems

  7. #7
    im using a stock 400 block with a 900 base cam and have no problems with comps roller lifters.

  8. #8
    Senior Member RACING JUNKIE jmarksdragster's Avatar
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    I also have a .900 base circle .625 lift that works on a factory block with horizontals. It is best to check before you buy, find someone with an old pair of lifters you can test fit. No sense spending money only to find it won't work.
    Mark Whitener
    http://racingfuelsystems.myfunforum.org
    __________

    Good work isn't cheap, and cheap work can't be good.


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