SBC 400 Cylinder Head Showdown

Discussion in 'High Performance Modifications' started by 1980RS, Jun 3, 2021.

  1. need-for-speed

    need-for-speed Veteran Member

    Messages:
    814
    Likes Received:
    37
    Joined:
    Feb 7, 2003
    Location:
    Conroe, TX
    Guys, I am betting on 170 cc heads myself. They're Eddy PN 6090 Performer heads I bought in 1999. I did have a 3 angle "performance" valve job done on them recently. I currently have them on my 355 with a CC extreme energy 262 cam and they run very well. I will be replacing that 355 with a roller 1 piece RMS 383 short block next year, but I am keeping those heads. Hoping for good results with those small intake runners. My plan is to run a somewhat mild cam - GM PN 1921073. It's the same cam GM put in it's ZZ383.

    Besides, Grandpa always said: "there's nothing wrong with a little head" :lush::p:D
     
    77 cruiser and biker like this.
  2. 1980RS

    1980RS Veteran Member

    Messages:
    5,514
    Likes Received:
    1,814
    Joined:
    Jun 17, 2006
    Location:
    MN
    You may be disappointed in the 262 cam, I ran the 268H cam in the 400 the last two races and while it makes for good torque the mph show it does not make much hp. A 383 with a cam duration in the 230ish range will be streetable and make some great power.
     
  3. 1980RS

    1980RS Veteran Member

    Messages:
    5,514
    Likes Received:
    1,814
    Joined:
    Jun 17, 2006
    Location:
    MN
    The Junk 400 is now out of the car. If I decide to test it again I am going to put my 292H or another cam in it and change the oil pump and bearings. Not going to take a chance on it going pop and then it's just a pile of real junk. New 406 is sitting in the engine bay.
     
    Z28-79 and muscl car like this.
  4. muscl car

    muscl car Veteran Member Lifetime Gold Member

    Messages:
    23,345
    Likes Received:
    1,789
    Joined:
    Jul 8, 2001
    Location:
    Hendersonville Tennessee
    Send it with 500 shot of nitrous !!!
     
    1980RS likes this.
  5. need-for-speed

    need-for-speed Veteran Member

    Messages:
    814
    Likes Received:
    37
    Joined:
    Feb 7, 2003
    Location:
    Conroe, TX
    Thanks RS. Actually, the 262 cam is on its way out. I’m pretty sure it’s wiped a lobe. I don’t plan to take my upcoming 383 to the strip, so I actually want to lean to the “low end TQ” side of the equation. The cam I am thinking of getting has: 509/528 222/230 112.
     
    1980RS likes this.
  6. 1980RS

    1980RS Veteran Member

    Messages:
    5,514
    Likes Received:
    1,814
    Joined:
    Jun 17, 2006
    Location:
    MN
    If you want low end torque then put the cam on a 106° LCA but the drivability may suffer a little.
     
    need-for-speed likes this.
  7. G72Zed

    G72Zed Veteran Member

    Messages:
    3,062
    Likes Received:
    1,530
    Joined:
    Sep 8, 2015
    Location:
    Canada
    Yes, those Stock and Super Stock heads are something else. What they have to do to make that kind of power and still "pour" the required CC's and nothing more is amazing !!!

    I had a set of once record holding SBC Iron OEM heads in my hands many years ago, no pic's allowed or note taking allowed, but I liked the thought of having a Chrysler Poly port in a SBC !!

    When you spend $10,000 CND to have a set of OEM iron heads ported along with the intake, it shows what lengths these S-SS go to.

    I still have my fully ported and filled Sportsman II's, those heads gave me my best HP per cube @ 1.63, (.500 lift/91 pump), just behind your Stocker friends Dyno guy @ 1.66 hp/cube rating.
     
    1980RS likes this.
  8. 1980RS

    1980RS Veteran Member

    Messages:
    5,514
    Likes Received:
    1,814
    Joined:
    Jun 17, 2006
    Location:
    MN
    Went out "again" this time with my 1998 freshened up 406 that had the Dart heads on it. 10.60's to 10.70's 125+mph all day long, best was around closing time. Needs some 4.88's and new shocks to get'er better in the 1/8 mile and 60ft.
     
    Z28-79, G72Zed and xten like this.
  9. biker

    biker Veteran Member

    Messages:
    3,790
    Likes Received:
    1,786
    Joined:
    Dec 7, 2014
    Location:
    Canada
    Nice work. Seriously fast car for what you have into it. Proving cubic knowledge is a match for cubic inches and cubic dollars.
     
    1980RS likes this.
  10. 1980RS

    1980RS Veteran Member

    Messages:
    5,514
    Likes Received:
    1,814
    Joined:
    Jun 17, 2006
    Location:
    MN
    Thanks, funny thing is as I was watching a few of the in car videos, I noticed I was only shifting this 406 at 6300 so I really need to get my shift light set better for this coming Sunday. Next year I will not be racing much but I will be doing 2 sets of BBC heads over the winter. I will be making a set of raised runner peanut port heads, why you ask? well if the std. location ports work so well now think of how much better the straightened out ports will be. I will most likely use some kind of sq. port head to do this as the runner height is already in the right spot. The other set will be some reworked 990's that I plan to use on a 13 to 1 461 BBC for future use. There is also one more 406 that I need a new crank for so I can use the last of my good parts and that will be it for me for a while, unless I try to be trendy and build an LS engine, lol.
     

Share This Page