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  1. #1
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    Default Holden 9 port race head

    Started with a 161/149 casting & went a little nuts!

    Flowed with the vane & without the vane (just huge open port).

    Lift - flow - flow no vane
    .1 - 52 - 51
    .2 - 100 - 99
    .3 - 140.5 - 140
    .4 - 162 - 161
    .45 - 174 - 174
    .5 - 185.5 - 186.5
    .55 - 195 - 195
    .6 - 201 - 202
    .65 - 203 - 206
    .7 - 206 - 209
    .8 - 212 - 214

    So vane make virtually no difference to raw flow.

    But it sure as hell makes a difference to velocity profile, being a dimwit I didn't record the profile with no vane, lets just say it was pretty damn slow everywhere expect the active wall on the side with the open valve - no velocity ram gonna be happening.

    With the vane:

    Closed valve --- open valve
    side -------- side

    roof
    135 140 132 | 194 206 216
    132 133 130 | 192 200 220
    132 132 135 | 195 202 217
    floor

    Exhaust flow was also pretty damn good:

    .1 - 49
    .2 - 85
    .3 - 110
    .4 - 138
    .45 - 147
    .5 - 155
    .55 - 158
    .6 - 162
    .65 - 169
    .7 - 171
    .8 - 179

    Neither intake nor exhaust ever back up, both dead stable.
    Intakes on these can have turbulence issues, but not this one.

    Feeling pretty chuffed about this head, she's got enough to make well over 300hp, if you were to lean on it hard it could possibly go 350hp.



















    I'm not on here much any more - don't bother PM'ing me, chances are I won't read it, just call me on 08 8376 9540 if you need to get hold of me or email knight28@optusnet.com.au, phone is better!

  2. #2
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    Default











    I'm not on here much any more - don't bother PM'ing me, chances are I won't read it, just call me on 08 8376 9540 if you need to get hold of me or email knight28@optusnet.com.au, phone is better!

  3. #3
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    Valves are 7mm stem, 1.69/1.42"

    The purpose of the vane is to boost velocity in the active 1/2 of the port whilst still allowing 'top up' flow from the other side as a fully divided port cannot supply the cross section required.
    If you look at the velocity profile on either side of the vane I posted up the top there you'll see how effective it is without hindering flow any meaningful amount.
    I'm not on here much any more - don't bother PM'ing me, chances are I won't read it, just call me on 08 8376 9540 if you need to get hold of me or email knight28@optusnet.com.au, phone is better!

  4. #4
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    Default

    Wow looks a bit different than the head I saw sitting on the bench.

    I've got a soft spot for the lil Holden 6, this head should wake her up!

  5. #5
    been here .......too long Smitty2's Avatar
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    Default

    .. nice work TK

    the client didn't look at an angle cut for it also ?
    (yeah I know its a pain but chánging the 'squish' does lots of good things for the small red heads)
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  6. #6
    Part of the furniture wb_202's Avatar
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    Default

    What would a head cost to match it to the camshaft? Cause I'm looking for a price quote and one seems decent enough to want to help out?

  7. #7
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    Not sure what you're asking?

    I usually do heads as a package with camshaft to suit.
    I'm not on here much any more - don't bother PM'ing me, chances are I won't read it, just call me on 08 8376 9540 if you need to get hold of me or email knight28@optusnet.com.au, phone is better!

  8. #8
    Yes, the Kingswood. HQforme's Avatar
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    Just a bit nuts? Understatement. Haha.

    I tickled parts of my chamber in much the same way based on half an idea and a little intuition. Glad it's done by the pros too
    EFN 202 : knowledge is (horse)power!

  9. #9
    Do you ever leave? HPE PETE's Avatar
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    thats beautifull work tony.....speaking of holden 6 something special landed on my bench today, will post a pic

  10. #10
    Do you ever leave? HPE PETE's Avatar
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    brings back memorys of when people came up with "ideas" to make their engines faster as there were no fancy parts back in the day you could buy and simply improve, this came from a deceased estate and was done back in the 80's



  11. #11
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by HPE PETE View Post
    brings back memorys of when people came up with "ideas" to make their engines faster as there were no fancy parts back in the day you could buy and simply improve, this came from a deceased estate and was done back in the 80's
    .....
    .. ..port lift done in alloy, that's awesome !

    I did mine with mild steel bar.. which was tuff enuff to do but in alloy?
    the different expansion rates surely have to be a problem....

    great idea though ! (weight saving and easy machinability)

    ps... matching a manifold to this is an exercise in ingenuity
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  12. #12
    Do you ever leave? paulzig's Avatar
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    A stock LS1 makes more power LOL ...

  13. #13
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by paulzig View Post
    A stock LS1 makes more power LOL ...

    .. NO challenge in that 'starwars2
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  14. #14
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    Quote Originally Posted by paulzig View Post
    A stock LS1 makes more power LOL ...
    A stock LS1 is nearly twice the capacity- it should make more power. If it didnt, it would be a real worry...

    Besides, LS1s just dont have the charm of 202/253/308s...

  15. #15
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    Default

    Has this had a run on the dyno yet??

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