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buildin a bbc

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    Member Lilly pad's Avatar
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    Default buildin a bbc

    I'm wanting to build a hi rev bbc.what would a machinest charge to retro a gen iv for roller lifters and is that all that is needed to install a roller cam in this block?I have not decided on what cam I'm gonna use yet,Im sure it will be size
    LARGE thanks
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    Blown, OHBA Member Wild Hair's Avatar
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    I have a solid roller in a gen 4 with no machining mods. but I used a comp cams complete kit, Come with springs lifters, cam, cam timing, and crank gears. This is the first complete kit I've used so I cant say if I like it or not yet.
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    Senior Member Bubbletop409's Avatar
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    No special machine work is necessary to use roller lifters in a Mk IV block, depending on what your idea of high rpm is, you may want to look into having the lifter bores indexed and bushed.
    Larry

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    Member Lilly pad's Avatar
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    5500+ is my idea of high rpm
    I thought that the block needed to be clearanced for roller lifter link
    so far the wish list consists of a gm 454 w/splayed caps,brodinx heads,tunnel ram,at the least.I dont want this to get into a cam thread just wanted to find out about lifter bore's and roller lifters thanks
    life's journey is not to arrive at the grave safly in a well preserved body...but rather to be skiding in sideways,flipping,and spinning totaly out of control shoutin hell F***in yea,
    what a ride!!!!!!!!

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    Senior Member Boat 405's Avatar
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    Quote Originally Posted by Lilly pad View Post
    I'm wanting to build a hi rev bbc.what would a machinest charge to retro a gen iv for roller lifters and is that all that is needed to install a roller cam in this block?I have not decided on what cam I'm gonna use yet,Im sure it will be size
    LARGE thanks
    Won't need to machine anything. Get a set of lifters like morels, should clear a link bar no problem Contact CSTRAUB here on the boards and he can help you out with the specific parts necessary. cam, lifters, springs, pushrods....

    edit. after reading last post. 5500 is low rpm, you can use hydraulic roller lifters no problem
    Boat 405.

  8. #6
    Blown, OHBA Member Wild Hair's Avatar
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    5500 RPMs ? You can save some money using iron heads. Like 049s, 781s oval ports. 188s or 990s rectangle port. I think any one will get you 5500 RPM and save you the money on aluminum heads and valve train parts. The only thing I had to clearence was the block for a 496 rotating assembly, had to remove a little from the bottom of each cylinder so rod caps would clear.

    Now probably is the time to ask what is this motor going in, Jet or V drive, as the setup behind the motor will have a factor in RPMs.
    Last edited by Wild Hair; 10-12-2009 at 03:44 AM.
    OHBA GROWTH THROUGH PARTICIPATION
    Built Cheyenne Tuff, With Chevy Stuff.
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    E-7 Sheepdog (ret) SmokinLowriderSS's Avatar
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    Quote Originally Posted by Lilly pad View Post
    5500+ is my idea of high rpm
    I thought that the block needed to be clearanced for roller lifter link
    so far the wish list consists of a gm 454 w/splayed caps,brodinx heads,tunnel ram,at the least.I dont want this to get into a cam thread just wanted to find out about lifter bore's and roller lifters thanks
    I run more RPM than that with a flat hydraulic, so that isn't "high rpm" at all.

    I think a "button" is needed on the cam chain/timing cover, to stop the cam from walking back and foreward (lobe angle on a flat tappet prevents this, not present on a roller).

    You also have zero needs for splayed caps ion that setup IMO, but hey, they are only a grand or so, plus machine work. Go for it.
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    i'm back!! 1QuickCP's Avatar
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    5500? just drop um in and have fun...high rpm ie 7500+, .904 lifters,dry sump with good 5 stage pump ect ect ect..........

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    A set of Retro Fit Tie Bar Morel roller lifters is all you need. They run about mid to high $500 range.
    Chris Straub
    Straub Technologies

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  12. #10
    Senior Member wildstreak's Avatar
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    Yes you can drop in a set of roller lifters, but if all you are looking for is 5500rpm why not a flat tappet solid lift cam? Much cheaper in the long run and at that rpm will do every thing you are looking for, and wont be changing valve springs and roller lifters every year. Did I just say dont get the roller?? I know not like me, but you dont need it for where you want to go.

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