Cylinder Heads

Discussion in 'PSI Superchargers Tech Questions' started by robin 12, Dec 18, 2007.

  1. robin 12

    robin 12 New Member

    Joined:
    Nov 23, 2007
    Messages:
    8
    Likes Received:
    0
    Whats the Difference between Bae-4 and Bae-5 ? Also whats the Difference between Bae-5 and Bae-5 Fatheads? If your on a budget whats the best set of heads for Alcohol funny car engine? Is there large differences in power gains Etc?
     
    #1
    robin 12, Dec 18, 2007
  2. Flyboy68

    Flyboy68 Member

    Joined:
    Mar 26, 2006
    Messages:
    565
    Likes Received:
    0
    I could be wrong but I believe the Brad 5's have raised exhaust ports vs standard ports on the Brad 4's.
     
    #2
    Flyboy68, Dec 20, 2007
  3. underby6

    underby6 Active Member

    Joined:
    Sep 28, 2006
    Messages:
    1,189
    Likes Received:
    0
    Not sure about the -4's but the differences as I know them for the 5's and 6's are as follows:

    6's have smaller combustion chamber, I believe 92cc vs the 5's at 101cc's.
    6's don't have the tuliped exhaust valve that the 5's do. From my knowledge the 6's were designed for the Pro Mods with the limited overdrive, but many TA teams are running them. As far as budget it all depends on how big your budget is.

    Brandon
     
    #3
    underby6, Dec 20, 2007
  4. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
    Staff Member

    Joined:
    May 6, 2003
    Messages:
    6,706
    Likes Received:
    133
    heads

    the raised exaust port and some lightening is the only difference between bae fathead 4's and 5's. everything is interchangeable between the two except the exuast valve.

    the newer model fathead 5 heads have cnc intake ports vs smooth finish of the older 5 heads.

    the latest stage 6 head has a slightly higher intake port and a smaller intake valve. it also has a d shaped exaust port. takes the same hardware as the 5 head but different valves and retainers. some teams run lash caps, but the head was designed to use the lash lock keepers with shorter valve tips.

    any 'fathead' has a much smaller combustion chamber. all other head references (bae brand) are 'fuel' heads with much bigger chambers. these fuel heads are commonly referred to 'bae 3' heads. there were a very, very limited number of 'fathead' 3's. primarily when you hear bae 4 or 5, they are referring to a fathead. not to be confused with 'stage 4 or 5'.

    i would advise anyone to invest in fatheads to start out with rather than going the cheaper route and buying used fuel heads. with all the different heads out there that have come out in the last few years, there are some good fathead 5 stuff out there very affordable. all the latest combos (bae wise) are still running the same hardware that you'll run with even bae 4's. if you buy fuel heads, you have to change heads, rockers, intake, headers, etc to step up to current hardware.

    not saying all fuel heads are a bad idea but most have many, many runs on them, and quite possibly many repairs over the years. there is plenty availability of fat head parts on the used market to build a very nice motor on a budget. if i ever build a car to run top dragster and local stuff, i'll build it with used fatheads.
     
    #4
    Will Hanna, Dec 20, 2007
  5. jim phillips

    jim phillips ta/fc

    Joined:
    Apr 29, 2007
    Messages:
    1,242
    Likes Received:
    0
    good job will i was wondering what the difference was i have only ran the old fuel heads and they work pretty good 3.90s in the 1/8 mi low 6sin the 1/4 mile have ran the venney heads they worked better 5.70s but have been curious about the brad 5 stuff but didnt want to ask any one i didnt know didnt want to look stupid on here with all you professionals thanks
     
    #5
    jim phillips, Dec 20, 2007
  6. Fooler

    Fooler New Member

    Joined:
    Apr 26, 2007
    Messages:
    20
    Likes Received:
    0
    bolt pattern port location

    Does an old BAE "fuelhead" and a Stage V head have the same exhaust bolt pattern and port location? Just asking because I am looking at buying some used headers.
     
    #6
    Fooler, Dec 21, 2007
  7. Mike Canter

    Mike Canter Top Dragster
    Staff Member

    Joined:
    Mar 10, 2004
    Messages:
    4,630
    Likes Received:
    189
    Thanks Will. I have often wondered on the real difference.
     
    #7
    Mike Canter, Dec 21, 2007
  8. nitrohawk

    nitrohawk New Member

    Joined:
    Dec 28, 2003
    Messages:
    1,016
    Likes Received:
    0
    he old fuel heads and the BAE V fatheads do not have the same exhaust bolt pattern. I don't know what you are looking for but I have a real nice set of headers for the fuel heads that I would sell as I don't need them any more.
    Bob Holley
    979-230-0582
    bobholley33@yahoo.com
     
    #8
    nitrohawk, Dec 21, 2007
  9. john348

    john348 Top Alcohol

    Joined:
    May 29, 2003
    Messages:
    1,348
    Likes Received:
    5
    you all sound like brads are the only one that can fly

    what about Kens heads they seemed to treat Newberry pretty good
     
    #9
    john348, Dec 21, 2007
  10. robin 12

    robin 12 New Member

    Joined:
    Nov 23, 2007
    Messages:
    8
    Likes Received:
    0
    Thanks for all the Info on the Heads!!! I did not mean to leave venney heads or anyboby elses heads out . I really didnt understand no alcohol heads so I had to start somewhere? So why doesnt somebody give a little info on venney heads compared to Bae heads ? Also does Bae heads have thereown Intake manifolds and venney have there own manifolds Etc?
    Thanks
    Robin12
     
    #10
    robin 12, Dec 21, 2007
  11. Lawren Jones

    Lawren Jones Comp Eliminator

    Joined:
    Dec 9, 2003
    Messages:
    231
    Likes Received:
    0
    Will... how ya doing?

    Sense you are a Brad guy I have a question for you.
    Got a customer who is building a fast bracket type car and has found a complete Brad 1 short deck deal. 438ci... The price is right... $8000 from hat to pan (no blower). Opened the thing up and it has new everything in it. Not even a window. Story goes it was a spare engine for Capps when he drove for Mitchell. Mitchell switched to fuel and a guy here in Albuquerque bought all his alcohol stuff. The customer is asking my advise on buying it. I don't know shit about Brad stuff. Give me some help here, as I don't want to steer him in the wrong direction. $8000 does sound like a good price.

    EDIT: Does anybody know anthing about Brad 1 heads?
     
    #11
    Last edited: Dec 22, 2007
    Lawren Jones, Dec 21, 2007
  12. Will Hanna

    Will Hanna We put the 'inside' in Top Alcohol
    Staff Member

    Joined:
    May 6, 2003
    Messages:
    6,706
    Likes Received:
    133
    heads

    with no windows and fresh parts, hard to beat that price for a bracket deal. brad 1? if it came from the time frame when capps was driving for mitchell, i'm guessing that was early 90's late 80's....so I guess it's fuel heads. still a good deal.

    john...

    i didn't mean to 'dis' any other types of heads/engines. he just asked what the differences were in brad heads. i haven't ran veney heads, so i don't know all the differences in those heads. for a budget, i think a fat head is a good option because of the availability of parts....but thats just my opinion.

    people run fast with veney stuff and mbr stuff. was just stating what i know.
     
    #12
    Will Hanna, Dec 24, 2007

Share This Page





XenPorta 2 PRO © Jason Axelrod from 8WAYRUN.COM