Page 1 of 2 12 LastLast
Results 1 to 10 of 14

Thread: 622 bbc

  1. #1
    Member JOURNEYMAN
    Join Date
    Apr 2007
    Location
    Australia
    Posts
    32

    622 bbc

    what do the experts think of this combo?

    4.75x4.560
    dart big m heads
    13:1 comp
    sheet metal ram, 6" tappered runners
    2x 1190 DR Demons
    110 lobe
    270/280
    790/750
    vac pump

    should it crack the 1000hp mark?

    cheers.

  2. #2
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Location
    Coldwater, MI
    Posts
    2,998
    That combo shouldnt have any problem cracking the 1000hp mark IMO

  3. #3
    Senior Member EXPERT BUILDER
    Join Date
    Dec 2006
    Posts
    272
    If you cannot hit 1000 hp with that, you better take up a new hobby...... :lol:
    I dunno about the demons though.....not my carb of choice....
    Ed

  4. #4
    Administrator RACING JUNKIE bjuice's Avatar
    Join Date
    Apr 2003
    Location
    Greenville s.c.
    Posts
    3,239
    i have a 622...little bigger cam...i also have big chief heads 14 degree,,,worked to the max...EPD sheet metal intake,,,dry sump..pair of 1200 chuck Nuyghtten dominaters..
    and it made right at 1200 hp..and well into the 900 TQ range

    so i would say no doubt yopu will be all over 1,000 hp
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  5. #5
    Member MASTER JOURNEYMAN
    Join Date
    Dec 2004
    Location
    Memphis
    Posts
    38
    BigM heads usually need a bunch of work from what I have seen just to make run right....not darts best work thats for sure.....
    I would look into some BMFs or Profilers for my dime if your stayin conventional....

    or did what I did,buy some big chief pro 1s and have them opened up
    to match your CID -

  6. #6
    Senior Member RACING JUNKIE
    Join Date
    May 2003
    Location
    Coldwater, MI
    Posts
    2,998
    I had a set of big m's on a 548 they were the pro-mod ported from dart. I took them off and put a set of cnc'd dart 355's on and lost .05
    David Lanning
    IHRA NHRA 387B

    Fleenor Racing Transmission
    419-280-1406
    Lanning Electric
    Complete Drag Car Wiring
    APD Race Engines
    www.apdracing.com

  7. #7
    Senior Member SENIOR BUILDER
    Join Date
    Oct 2004
    Location
    Woodbridge, VA
    Posts
    101
    I think the Dart Big M is a great head for your combo, .
    I've made TONS of power with them but they do need a little
    porting to clean up the bowls etc.

    It should crack 1000hp without much problem, .

    Curtis
    ----------------------------------------
    Race Flow Development
    Simultaneous 5-axis CNC Porting
    http://www.raceflowdevelopment.com

  8. #8
    Member JOURNEYMAN
    Join Date
    Apr 2007
    Location
    Australia
    Posts
    32

    622 bbc

    the heads are big m super mod, 420@ .850, i will take them out to full polish specs of 433@ .850.
    what octane fuel will be needed with this combo?

  9. #9
    Administrator RACING JUNKIE bjuice's Avatar
    Join Date
    Apr 2003
    Location
    Greenville s.c.
    Posts
    3,239
    1st off i am a Sunoco Dealer and Ex VP fuel dealer.


    the octane rating is conssdered only to combat detonation due to high compression.

    if your motor is 13.1..then 110 octane would be fine..and if you wanted to add a little room for safety then the 112 supreme would be more than enough..
    DO NOT use pump gas with your combo..

    Brian
    Bjuice..

    "I'M YOUR HUCKLEBERRY ! "

  10. #10
    Member JOURNEYMAN
    Join Date
    Apr 2007
    Location
    Australia
    Posts
    32
    say i went back to 11:1 comp and 100 octane pump? what would be a ball park hp figure?

    rob


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Email us - Support@RacingJunk.com
Call us - 866.326.9227
Copyright © 2005-2016 RacingJunk.com All Rights Reserved.

Designated trademarks and brands are the property of their respective owners. Use of this Web site constitutes acceptance of the RacingJunk.com
Terms of Use, Classifieds Disclaimer, Privacy Policy, and Cookie Policy