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Thread: Extreme hardcore head porn!!!

  1. 02-06-2009, 11:32 AM #31
    kenikh
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    Quote Originally Posted by jbell959 View Post
    Hi Kenik - Those heads are awesome...

    Why did you decide on a 2.4S MFI pump. When I built my 2.5SS engine it was suggested that the best would be a 2.2S pump since I was running the 66mm crank. Just curious.. Can't wait to see it complete.
    Basically the pump doesn't matter - it's just what I had handy. Any of these can be tuned to work - well, pretty much. Any 'S' space cam motor will pump enough fuel for an 8000 RPM motor of pretty much any displacement. Just ask Jeff Higgins how well his "hotter than S cammed" MFI 3 liter runs at 7500 RPM using a 2.4T pump.

    Frankly, the best pump is the 2 liter S pump - even more adjustable than any of the later pumps. If you are going to build a 3.4L screamer, that's the pump.
    Kenik
    - 1969 911S
    - 1965/66 911
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  2. 02-08-2009, 02:46 PM #32
    dvkk
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    What are the valve sizes of those heads?
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  3. 02-08-2009, 02:50 PM #33
    kenikh
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    Quote Originally Posted by dvkk View Post
    What are the valve sizes of those heads?
    Stock '69S valve sizes.
    Kenik
    - 1969 911S
    - 1965/66 911
    - S Reg #760
    - RGruppe #389
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  4. 02-08-2009, 02:58 PM #34
    dvkk
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    Thanks.

    Can you tell me what those are?
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  5. 02-08-2009, 03:07 PM #35
    kenikh
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    Quote Originally Posted by dvkk View Post
    Thanks.

    Can you tell me what those are?
    They measure I45/E39
    Kenik
    - 1969 911S
    - 1965/66 911
    - S Reg #760
    - RGruppe #389
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  6. 02-09-2009, 08:20 PM #36
    dvkk
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    Those heads are indeed great performers!
    I showed your numbers to a head guy I know and he came back with some interesting numbers.
    A current Pro-Stock drag racing Hemi head will flow around 115-120 CFM/in^2 of valve area. Your heads are in at almost 96 CFM/in^2. Certainly way better than Porsche could achieve way back then.
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  7. 05-08-2009, 04:59 PM #37
    CamBiscuit
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    Kenik what heads did you start with for these?

    I understand T heads are easier to work with as the smaller ports means more to work with?

    How's the project going?
    Looking for engine # 6208151
    '74 RS 3.0 Replica
    '70 911E Bahia Red (SOLD)
    '71 911 S/T Replica 2.3 Twin plug BEAST (SOLD)
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    Early S Registry # 1076
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  8. 05-08-2009, 10:35 PM #38
    kenikh
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    Progress is slow. I got my custom rods, but still need my other crank ground to GT3 rod journal spec to accomodate.

    The heads are real 69S, but were previosly modified, so the extra work didn't break etiquette.
    Kenik
    - 1969 911S
    - 1965/66 911
    - S Reg #760
    - RGruppe #389
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