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Thread: sbc427 heads HELP

  1. #1

    sbc427 heads HELP

    i have a sbc 427 with brodix track ones i feel they holding me back can any one tell me what i need with out going 18deg mine is 23deg dont want to change pistons been told the new afr 220 elm are the best have seen somepontiac 867 that flow unreal can anyone tell me about them do they need off set rockers please help thank you very much

  2. #2
    Senior Member RACING JUNKIE curtisreed's Avatar
    Join Date
    Feb 2004
    Location
    KIEFER, OK.
    Posts
    1,309
    Here is some 23 head flow info for you from Speier Racing Heads. Chad posted these numbers on DRR's bracket talk tech section for a guy with a 383. Hope this is a help.

    Curtis

    Here for you flow number guys. All number from my bench.

    Pro-Filer (As-cast 2.08, finished chamber)
    .200 143.2
    .300 211.1
    .400 260.1
    .500 289.3
    .600 297.5
    .700 299.1
    .800 302.8
    .900 299.6
    1.00 297.7

    AIR Wolf 220 (2.08 valve)
    .200 149.8
    .300 217.2
    .400 265.5
    .500 299.8
    .600 311.1
    .700 316.7
    .800 321.1
    .900 322.1
    1.00 324.6

    AIR Wolf 220(2.100 valve)
    .200 149.7
    .300 214.7
    .400 264.8
    .500 300.6
    .600 317.8
    .700 323.1
    .800 328.5
    .900 329.2
    1.00 332.8

    AFR 227 (2.100 Race Ready)
    .200 144.7
    .300 205.9
    .400 259.7
    .500 297.4
    .600 293.3
    .700 296.7
    .800 299.7
    .900 300.5
    1.00 302.1

    AFR 235
    .200 144.4
    .300 208.9
    .400 259.6
    .500 290.2
    .600 312.2
    .700 322.5
    .800 328.9
    .900 326.5
    1.00 318.9

    RHS v2.75 (2.100 valve)
    .200 141.2
    .300 198.8
    .400 247.7
    .500 287.5
    .600 316.2
    .700 330.1
    .800 338.6
    .900 341.9
    1.00 345.5

    AIR Wolf 245 (2.125 Valve)
    .200 161.4
    .300 230.1
    .400 280.1
    .500 311.5
    .600 328.9
    .700 340.9
    .800 353.1
    .900 356.8
    1.00 357.9

    AFR 220 (2.100 Eliminator)
    .200 145.5
    .300 198.8
    .400 249.9
    .500 291.1
    .600 313.5
    .700 314.3
    .800 313.4
    .900 310.4
    1.00 309.4

    RHS 220 (2.02 valve)
    .200 133.4
    .300 186.9
    .400 232.6
    .500 267.8
    .600 280.6
    .700 282.2
    .800 280.9
    .900 280.3

    RHS 235 (2.02 valve)
    .200 121.1
    .300 173.2
    .400 220.7
    .500 256.8
    .600 284.6
    .700 288.3
    .800 287.7
    .900 282.5

    Track 1 (as-cast 2.08)
    .200 124.7
    .300 170.9
    .400 221.7
    .500 258.8
    .600 266.3
    .700 275.5
    .800 276.2
    .900 268.8
    1.00 262.5

    11X (2.08 Valve)
    .200 132.9
    .300 201.6
    .400 240.9
    .500 279.2
    .600 289.5
    .700 282.2
    .800 281.7
    .900 285.2

    KC227 (2.08 valve)
    .200 147.9
    .300 221.0
    .400 271.1
    .500 299.1
    .600 310.2
    .700 318.2
    .800 316.5
    .900 312.2
    1.00 308.6

    215 T1 CNC (2.08 valve)
    .200 147.4
    .300 209.5
    .400 260.9
    .500 282.5
    .600 304.5
    .700 304.4
    .800 299.9
    .900 297.6
    1.00 295.5

  3. #3
    Senior Member MASTER BUILDER
    Join Date
    Apr 2003
    Location
    Brookings South Dakota
    Posts
    244
    AFR 220 is capable of making over 700 HP on that 427. We use them on a regular basis. Be prepared to port the intake, you will need extra air flow for the top end.
    Competition Engines & Hardcore Engine Parts
    www.cnc-motorsports.com
    info@cnc-motorsports.com

  4. #4

    thanks guys

    im looking real hard into the afr 220's what intake u say i got the hvh 1000 brodix now with nothing done to it also going with a 1.6 rocker give me more lift

  5. Racing Junk


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