BBC Build

Discussion in 'Engine Topic' started by Strange81Z, Apr 7, 2021.

  1. Strange81Z

    Strange81Z Veteran Member Lifetime Gold Member

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    that’s great advice. Yea I don’t want a crate motor. I know it will cost more this route but the satisfaction of building it ourselves is more valuable to me. Plus the education for myself and mainly my son is worth the extra cost.

    i bought a crate on my last engine and it made it easier and cheaper but the only thing he learned from it was how to mount the oil pan, timing chain, intake, carb and distributer. Which was good enough at the time but I want him to fully understand how to build a motor from the ground up, minus the machining part of course.
     
  2. Strange81Z

    Strange81Z Veteran Member Lifetime Gold Member

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    Since you’re in the industry do you happen to know of a good machine shop in Amarillo Texas?
     
  3. G72Zed

    G72Zed Veteran Member

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    Sorry I do not, I'm way up here in the GWN (great white north). Only thing that comes to mind, with the last BBC's I worked on is David Reher at Reher-Morrison in Arlington, TX, with new Darin Morgan heads.

    Now, if you go there for the BBC work, parts and machining....well, your at one of THE BEST places for that !!!!
     
  4. 1320feet

    1320feet Veteran Member

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    I built 2 454's with the same 10:1 compression and Comp 292h camshafts. One had unported rectangle heads and the other ported 781 heads. both sets had 2.19/1.88 valves. The rec head motor made 505hp peak at 6500 rpm. The oval port motor made 498hp peak at 5500 rpm. Basically the same power, but at 1000 rpm lower.
     
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  5. badazz81z28

    badazz81z28 Veteran Member

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    I personally would add in the budget a retro hydraulic roller lifter kit. It will be one less thing to worry about...I would also be cautious on porting the heads. Bigger doesn't mean better. I would just clean up bowl blend or have them professional ported who actual knows what they are doing.
     
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  6. carhead22000

    carhead22000 oldblue

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    ...yeah i agree your almost eliminating the chance of cam failure.some bbc had poor lifter bores.gen 4..454..
     
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  7. G72Zed

    G72Zed Veteran Member

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    A perfect example given by 1320feet of what happens when a less then fitting cylinder head is used, but properly sized, it makes the TQ/HP at the RPM it was designed for.

    Roller and budget are at the opposite ends of the scale, but, loose a FT cam, and if your paying for labour, your even or in the hole on the second go around.

    Sometimes "porting" a head is more an exercise in "filling" then "removing".
     
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  8. badazz81z28

    badazz81z28 Veteran Member

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    If you’re gonna put money somewhere, it would be on the important stuff. I would say wiping a FT cam seems to be a ever growing common problem and will be a costly fix.
     
  9. 1320feet

    1320feet Veteran Member

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    I've often thought of filling the floor of the rec port head with epoxy. To make a raised runner oval port.
     
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  10. G72Zed

    G72Zed Veteran Member

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    Yep, but could make the short side to fast and seperate, but corner's don't flow well to begin with.
     
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