stantard size roller lifters vs the .904
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stantard size roller lifters vs the .904

  1. #1
    Senior Member tx-19's Avatar
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    Default stantard size roller lifters vs the .904

    is it worth the extra money to have the block bored?

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    Senior Member wagspe208's Avatar
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    Nope.
    Not for what you are doing.
    Wags

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    Senior Member tx-19's Avatar
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    Quote Originally Posted by wagspe208 View Post
    Nope.
    Not for what you are doing.
    Wags
    what are the .904 good for?are the stantarded size ones strong enough for .800 lift?

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    steelcomp was here
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    My machinist charges me 275.00 to bore lifter bores if I already have the block in the machine.
    A few things come to mind:
    Pro's
    In any situation, the .904 lifter is going to be more stable.
    The larger wheel and axle are going to last longer.
    The fresh mchine work gives you the opportunity to regain proper lifter/bore clearance if the block is worn.
    Con's:
    A set of Pro series .904 GS or Morels are 800.00. I think Crowers run about the same.
    If you already have a cam, you'll change the cam profile with the larger wheel. The cam should match the lifter.
    You might also need new pushrods.
    If God is your co-pilot, change seats!
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    Senior Member tx-19's Avatar
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    Quote Originally Posted by steelcomp View Post
    My machinist charges me 275.00 to bore lifter bores if I already have the block in the machine.
    A few things come to mind:
    Pro's
    In any situation, the .904 lifter is going to be more stable.
    The larger wheel and axle are going to last longer.
    The fresh mchine work gives you the opportunity to regain proper lifter/bore clearance if the block is worn.
    Con's:
    A set of Pro series .904 GS or Morels are 800.00. I think Crowers run about the same.
    If you already have a cam, you'll change the cam profile with the larger wheel. The cam should match the lifter.
    You might also need new pushrods.
    im starting from scratch with cam lifters and heads.im looking for durability so do mind spending the money to make things last longer.

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    800" lift, yes a .904" would be in your best interest. With the spring pressure required for that the larger lifter just gives you more load baring capability. You take a spring that is 750# open and multiply that by the rocker ratio you are seeing 1275#.
    Chris Straub
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    Senior Member wagspe208's Avatar
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    TX, is this a race piece?
    .904 ceretainly are an advantage. The question is are they enough of an advantage for your application.

    If it is a race piece... drag especially, .843 stuff is fine. I agree with CS on what he said. But is it necessary?

    How many rpm will you be turning?

    One advantage is you can step up on lobe profile, less roller speed, more stable, etc. Just like CS said.

    Is it worth the money is the real question. If your budget has no limits, hell yes. Or save the extra cash and get a better block. Etc.
    Give us info about your plan.

    Oh, don't go put in a piece of crap .904 just cause they are bigger. Excellent .843's will be better than run of the mill .904's.

    Why do you need an .800 lift cam?


    Wags

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    Senior Member tx-19's Avatar
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    Quote Originally Posted by wagspe208 View Post
    TX, is this a race piece?
    .904 ceretainly are an advantage. The question is are they enough of an advantage for your application.

    If it is a race piece... drag especially, .843 stuff is fine. I agree with CS on what he said. But is it necessary?

    How many rpm will you be turning?

    One advantage is you can step up on lobe profile, less roller speed, more stable, etc. Just like CS said.

    Is it worth the money is the real question. If your budget has no limits, hell yes. Or save the extra cash and get a better block. Etc.
    Give us info about your plan.

    Oh, don't go put in a piece of crap .904 just cause they are bigger. Excellent .843's will be better than run of the mill .904's.

    Why do you need an .800 lift cam?


    Wags
    i am building a 584 bbc.i just purchased a set of the brodix 18* pb1800.the block is a tall deck bowtie block with a kryptonight 4.375 stroke.im going to be getting oliver rods and maybe custom pistons unless i can find a off self piston.hoping to spin 7k out of it.

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    Senior Member tx-19's Avatar
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    steel your pms are full.tried to pm you.

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    steelcomp was here
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    Quote Originally Posted by tx-19 View Post
    steel your pms are full.tried to pm you.
    sorry...fixed it.
    If God is your co-pilot, change seats!
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    Bostick Racing Engines six-oh-nine's Avatar
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    Quote Originally Posted by tx-19 View Post
    i am building a 584 bbc.i just purchased a set of the brodix 18* pb1800.the block is a tall deck bowtie block with a kryptonight 4.375 stroke.im going to be getting oliver rods and maybe custom pistons unless i can find a off self piston.hoping to spin 7k out of it.
    The .903 will also be good for your app since with the 18* heads you will want to run an offset lifter for the intake and the larger bore and wheel dia will be benificial for the added side loading.
    The Bostick®

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    Senior Member wagspe208's Avatar
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    Well, this does not seem to be a budget piece, so yes, they would be a benefit.
    If you were on a limited budget, there are other places to spend the $$. Looks like a pretty good budget!
    Wags

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    Senior Member tx-19's Avatar
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    Quote Originally Posted by wagspe208 View Post
    Well, this does not seem to be a budget piece, so yes, they would be a benefit.
    If you were on a limited budget, there are other places to spend the $$. Looks like a pretty good budget!
    Wags
    its not a budget peice,but its going to take sometime to build.want things done right even if it takes a year.

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    gn7
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    Quote Originally Posted by six-oh-nine View Post
    The .903 will also be good for your app since with the 18* heads you will want to run an offset lifter for the intake and the larger bore and wheel dia will be benificial for the added side loading.
    Thats when you say screw the budget, to hell with the kids collage fund, and start spending their inheritence and grab one of these
    LINK: Shifted lifter bore block



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