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  1. #31
    casual poster JaseQ314's Avatar
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    Quote Originally Posted by 427 View Post
    Here's a single plane for ya.
    Edelbrock Super Victor..i think it might be thirsty..

    Sent from my GT-I9507 using Tapatalk

    An unusual looking Holden 308.

  2. #32
    427
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    Well spotted mate. This project will begin this year...

  3. #33
    Part of the furniture Williamz's Avatar
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    +1 for the Performer. Had two of these now on different engines, both stoke stroke 308's. One with a TQ30, and other a stocker. Maxitork will work in the hands of a builder who knows what they're doing though, don't get drawn into the hype.

    Anyone done a good thread on that dual plane air gap manifold yet for 308's yet? I've been under a rock for a while

  4. #34
    Do you ever leave? paulzig's Avatar
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    Why buy the dual plane airgap when for the same price you get a victor jr ... You dont even have to know what you are doing to make a single plane work really well...

  5. #35
    Not the Kingswood! hq308's Avatar
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    Quote Originally Posted by paulzig View Post
    Why buy the dual plane airgap when for the same price you get a victor jr ... You dont even have to know what you are doing to make a single plane work really well...
    The only reason would be bonnet clearance otherwise you'd go for the Victor Jr.

    Having said that the airgap isn't that bad a compromise if you do need the clearance (especially on a std stroke). In my case peak power is at ~6200rpm so not really sure how much I'd gain with a single plane.

  6. #36
    Do you ever leave? paulzig's Avatar
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    Quote Originally Posted by hq308 View Post
    In my case peak power is at ~6200rpm so not really sure how much I'd gain with a single plane.
    Might bring it up to 6500RPM hopefully.. But you would also gain at the over rev past that up to 7000+ You dont need as much duration on the cam if your induction system, heads, intake, carburetor/TB breathe more freely.. If you had a cam that was 250, you might get away with less like 240-245 for the same RPM

  7. #37
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    Id be bloody keen to see how a Holden 355 (with around 450hp) would perform using an Edelbrock Dual Plane Air Gap and then try it with the Edelbrock Single Plane as a back to back test...

  8. #38
    Not the Kingswood! hq308's Avatar
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    Quote Originally Posted by paulzig View Post
    Might bring it up to 6500RPM hopefully.. But you would also gain at the over rev past that up to 7000+ You dont need as much duration on the cam if your induction system, heads, intake, carburetor/TB breathe more freely.. If you had a cam that was 250, you might get away with less like 240-245 for the same RPM
    Thatd be good if the engine was built for 7000+ but its not. Its a street engine and the rev limit is set to 6500 to help it live for a while.

  9. #39
    427
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    46 Crab you are spot on the money. It would be good to see results on the dyno. Is anyone from Engine Masters reading ? ☺

  10. #40
    Newbie Essoman's Avatar
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    Have to agree with 'Red Taxi', I've always found single plane intakes are designed for higher rev's/ hp delivery, with dual planes more for cruisers and beefed street engines. Performance increases in low to mid rev range that most Aussies enjoy. But, either way life's too short not to experiment if you've got the part and are curious. It wont detonate.

  11. #41
    Do you ever leave? paulzig's Avatar
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    Quote Originally Posted by Essoman View Post
    Performance increases in low to mid rev range that most Aussies enjoy.
    Aussie women, or gay men maybe... You can have more than enough low to midrange with a single plane as well.. If you have 350-400LBS at peak TQ with a 308 at 4500-5000RPM you have more than enough below that too, probably more than what street tyres on a public road can contain too..

  12. #42
    Part of the furniture Deuce.'s Avatar
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    Quote Originally Posted by paulzig View Post
    Aussie women, or gay men maybe... You can have more than enough low to midrange with a single plane as well.. If you have 350-400LBS at peak TQ with a 308 at 4500-5000RPM you have more than enough below that too, probably more than what street tyres on a public road can contain too..
    I would agree with that. I have spent the last few years slowly trying to move torque away from idle as I had too much down low.

  13. #43
    Do you ever leave? paulzig's Avatar
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    Quote Originally Posted by Deuce. View Post
    I would agree with that. I have spent the last few years slowly trying to move torque away from idle as I had too much down low.
    The bit about women and gay men was a joke, to pre-empt anyone getting offended

    Years ago when I was 18 I bought a Victor 340 single plane for my small block mopar, it had a shitty 3500 stall or something, I had 3:1 gear (later changed to 4:1) All the old guys would say, you ****ed your engine, this is race only, all the torque gone to shit.. I put it on, fiddled with the Holley, went on the road and it was awesome.. Came back they asked how it was, said great it goes to 7 grand now without laying down.. What about the torque? Well, theres 2 long black lines up the industrial estate road so I dont know you tell me..

  14. #44
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    Quote Originally Posted by Essoman View Post
    Have to agree with 'Red Taxi', I've always found single plane intakes are designed for higher rev's/ hp delivery, with dual planes more for cruisers and beefed street engines. Performance increases in low to mid rev range that most Aussies enjoy. But, either way life's too short not to experiment if you've got the part and are curious. It wont detonate.
    Don't ruin it for me guys. Finally I was right about something. That said, I haven't run a dual plane since I was 18.
    Building a cruiser soon though. Might have to re visit my youth.

  15. #45
    Do you ever leave? paulzig's Avatar
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    I'm Australian, I live here in Australia and I DO NOT enjoy increases in low to mid range, I want mid to high increases so maybe that makes me un-australian an persona non grata at an Aussie day BBQ

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