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  1. #31
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    Thanks swampy but Iím going to be turning this car into my P plate daily and for legal reasons have to stick with the straight 6 but I thought why not have some fun with it, hense the question on how to improve power from the Straight 6 me and my dad have only ever played around with v8ís this is why Iíve asked on the forum because I need as much advice as I can get

  2. #32
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    power to around and slightly beyond 200 HP is easy in those engines, but iirc you made mention of fuel economy also

  3. #33
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    Quote Originally Posted by desoto30 View Post
    power to around and slightly beyond 200 HP is easy in those engines, but iirc you made mention of fuel economy also
    Is it difficult for alright fuel economy and power?? Even if I bought an aftermarket ecu and got a tune?

  4. #34
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    Quote Originally Posted by hq308 View Post
    You can get away with a small cam, Crane used to do a good one under their "Cam Dynamics" brand. I did a mild VK EFI for my VB Commodore a little over 20 years ago with that cam and it ran great. I've just looked in an old catalogue and found the specs, it was 198 @ .050" with .383" lift on 110LC so not big by any standard but a little better than stock.
    Did you ever race it?

  5. #35
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    HI
    Mild Hq 6cyl HCompression 9.0:1 rated 135hp . My economy figs are 10-13 ltrs per 100km or 18-22mpg . trimatic 3.36 diff .
    Good single exhaust with twin cast iron headers . Had to modify inlet mani to fit . HEI ignition . Biggest single Stromberg out there . Cannot remember the various sizes now .
    This all was in the early eighties .
    Oh yea we had decent fuel not this current garbage .
    Car went ok far better response but not a 308
    Similar response to late XE XF falcon 250 weber carby engines . A falcon efi 250 was a good engine for the times as well . Way better than any early Holden 6 cyl
    Tried LPG economy was better slightly performance was way better on leaded fuel .
    Now lpg is just to costly
    Cubic inches = power and big cylinder heads with a maxed out 1/2 inch fuel line ,, sorry just dream`n
    Last edited by swampy; 09-02-2019 at 07:41 PM.

  6. #36
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    Talking about early 80's there used to be a strata manifold and turbo kit for the Holden 6. They were the shit for a Holden 6.

  7. #37
    Not the Kingswood! hq308's Avatar
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    Quote Originally Posted by 1BADVK View Post
    Did you ever race it?
    No it was my daily driver. If I remember correctly we didnít have a track in Sydney at the time anyway.

  8. #38
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    Quote Originally Posted by swampy View Post
    HI
    Mild Hq 6cyl HCompression 9.0:1 rated 135hp . My economy figs are 10-13 ltrs per 100km or 18-22mpg . trimatic 3.36 diff .
    Good single exhaust with twin cast iron headers . Had to modify inlet mani to fit . HEI ignition . Biggest single Stromberg out there . Cannot remember the various sizes now .
    This all was in the early eighties .
    Oh yea we had decent fuel not this current garbage .
    Car went ok far better response but not a 308
    Similar response to late XE XF falcon 250 weber carby engines . A falcon efi 250 was a good engine for the times as well . Way better than any early Holden 6 cyl
    Tried LPG economy was better slightly performance was way better on leaded fuel .
    Now lpg is just to costly
    Cubic inches = power and big cylinder heads with a maxed out 1/2 inch fuel line ,, sorry just dream`n
    Thanks mate

  9. #39
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    Quote Originally Posted by HQ 368 View Post
    Talking about early 80's there used to be a strata manifold and turbo kit for the Holden 6. They were the shit for a Holden 6.
    Cheers but this VK is going to be my P plate car and in Victoria your not aloud any forced induction

  10. #40
    Do you ever leave? HQ308Ute's Avatar
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  11. #41
    Part of the furniture Deuce.'s Avatar
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    Quote Originally Posted by HQ308Ute View Post
    That's a good and comprehensive break down. Great link hq308ute.
    OP give it a read and price up some parts to suit (even without cam upgrade if you must)

  12. #42
    Sure why not? 76lxhatch's Avatar
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    The EFI engine is pretty close to XU1 spec to begin with, just do a little maintenance and it will go fine in factory form. However the VN Delco would be one of the cheaper options to upgrade engine management if you needed to (for example if changing cam, which the original controller won't support properly) - but that's a lot of work for a car he can't even drive yet.

  13. #43
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    Quote Originally Posted by 1BADVK View Post
    Is it difficult for alright fuel economy and power?? Even if I bought an aftermarket ecu and got a tune?
    of course good tune is essential for both,,, but as always one has to compromise one for the other [power/economy strength/weight etc] in varying degrees..

  14. #44
    Do you ever leave? HQ308Ute's Avatar
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    Quote Originally Posted by 76lxhatch View Post
    The EFI engine is pretty close to XU1 spec to begin with, just do a little maintenance and it will go fine in factory form. However the VN Delco would be one of the cheaper options to upgrade engine management if you needed to (for example if changing cam, which the original controller won't support properly) - but that's a lot of work for a car he can't even drive yet.
    depends on how you're into it.. i started working on my first car when i was 14.

  15. #45
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    Quote Originally Posted by HQ308Ute View Post
    depends on how you're into it.. i started working on my first car when i was 14.
    Did they have cars back then?

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