Register now to get rid of these ads!

teach me about Big block chevys

Discussion in 'The Hokey Ass Message Board' started by cakes, Mar 24, 2011.

  1. hotroddon
    Joined: Sep 22, 2007
    Posts: 28,240

    hotroddon
    Member

    I think, given the lack of budget and ****py intake, I'm going to suggest a different route. Keep the peanut plug heads. They aren't half as bad as many would like to say. Without a stout bottom end, you're not going to twist this motor to high RPM anyway. Those heads will support 500HP so at this budget level they will be fine. Rebuild the bottom end using common sense, good machining and quality parts. With good pistons, go for around 9.5 - 10:1 compression. Balance everything. Stock rods will be fine with good bolts (ARP). Put in a Hi Volume Melling oil pump. Now go get a good single 4 barrel manifold like an Edelbrock Air Gap and a Holley or Edelbrock 750. Don't worry about the port mismatch, it won't matter. Use a good electronic distributor like PerTronix Plug and Play (less money then a MSD setup and much better than an HEI). With a good set of headers, and the cam you have, you should have between 405-500 HP and more importantly 550-600 Ft Lbs of torque.
    Forget things like dual carbs that will only shoot your budget. If you are serious about racing this thing on your stated budget, this will get you a stout motor that will run hard and be reliable.
     
  2. Deuces
    Joined: Nov 3, 2009
    Posts: 26,716

    Deuces

    Stock L-88's make that kind of power.....:rolleyes:
     
  3. Deuces
    Joined: Nov 3, 2009
    Posts: 26,716

    Deuces

    I bought my copy in 76 and still have it... :D
     
  4. Deuces
    Joined: Nov 3, 2009
    Posts: 26,716

    Deuces

    I think the low performance 427's 385, 390 and 400 horsepower versions all had cast iron cranks... I could be wrong... :eek:
     
  5. Deuces
    Joined: Nov 3, 2009
    Posts: 26,716

    Deuces

    Nope! They were rated @ 430 hp... Not sure about the torque figures... The dyno told a very different story..:rolleyes:
     
  6. hotroddon
    Joined: Sep 22, 2007
    Posts: 28,240

    hotroddon
    Member

    Oops, my bad - deleted:eek:
     
  7. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,339

    falcongeorge
    Member
    from BC

    and I have made that kind of power with a budget oval port, TRW piston, 2-bolt main 427, with the heads done the way I described earlier.:rolleyes:

    Guess I should add, it didnt have a Comp Cams "thumpr" cam in it.:rolleyes:
     
    Last edited: Mar 27, 2011
  8. squirrel
    Joined: Sep 23, 2004
    Posts: 59,983

    squirrel
    Member

    Early big blocks all had steel cranks, that includes the low perf engines. Somewhere around 69 they went to cast cranks. iirc
     
  9. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,339

    falcongeorge
    Member
    from BC

    I've never seen a cast 427 crank, not that I have seen hundreds or anything.
     
  10. Larry T
    Joined: Nov 24, 2004
    Posts: 7,921

    Larry T
    Member

    From Mortec

    3804816....396,402,427...cast
     
  11. Deuces
    Joined: Nov 3, 2009
    Posts: 26,716

    Deuces

    I just got done reading up on a bunch of articles on the net and they all stated that the "lo-po" big block cranks from '66 onward were cast iron...
     
    Last edited: Mar 28, 2011
  12. squirrel
    Joined: Sep 23, 2004
    Posts: 59,983

    squirrel
    Member

    The Bill Fisher book (written in the early 70s). says the steel crank was used in all 396s thru 67.

    I have a 67 325 hp 396 that came with a steel crank, I got the engine over 30 years ago.

    But the internet could be right, I suppose.
     
  13. cakes
    Joined: Sep 29, 2008
    Posts: 570

    cakes
    Member

    It is the internet after all, it must be true.....
     
  14. Deuces
    Joined: Nov 3, 2009
    Posts: 26,716

    Deuces

    Guess I gotta buy that book....
     
  15. falcongeorge
    Joined: Aug 26, 2010
    Posts: 18,339

    falcongeorge
    Member
    from BC

    I built a 427 around a crank from a '67 oval port 396, it was steel...
     
  16. aerorocket
    Joined: Oct 25, 2007
    Posts: 488

    aerorocket
    Member
    from N.E. P.A.

    I have a crank out of a 66 360 hp 396 that I got in 1976 and it is steel.
     

Share This Page

Register now to get rid of these ads!

Archive

Copyright © 1995-2021 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.