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  1. #1
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    Default Under bonnet VN headed 308 manifold..

    Hello all I'm organising a manifold for my vn headed 308 to go in my VH commodore and I'm wanting to keep it all under the bonnet.

    Motor specs are:
    308 with VN heads, comp 10:1, cam around 230 - 250 @ .050" can't remember off the top of my head.

    I have been recommended the edelbrock dual plane air gap but I'm a little concerned it won't all fit under the bonnet once the air filter is on, any help or advice would be great. Torque power do a low rise dual plane to suit VN heads

    vn-vt dual plane

    I don't know much about torque power are they any good??

    Cheers Tom.
    Last edited by Trvh83; 11-04-2019 at 12:40 PM.

  2. #2
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    Torque power are very good. Harrop are too, they also do a low rise dual plane. Both are expensive though. There is a cheap chinese knock off of a Redline Hi-winder for $250 on ebay (or was) that can also work. It's a low rise single plane.

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    Quote Originally Posted by Trvh83 View Post
    Hello all I'm organising a manifold for my vn headed 308 to go in my VH commodore and I'm wanting to keep it all under the bonnet.

    Motor specs are:
    308 with VN heads, comp 10:1, cam around 230 - 250 @ .050" can't remember off the top of my head.

    I have been recommended the edelbrock dual plane air gap but I'm a little concerned it won't all fit under the bonnet once the air filter is on, any help or advice would be great. Torque power do a low rise dual plane to suit VN heads

    vn-vt dual plane

    I don't know much about torque power are they any good??

    Cheers Tom.
    .. considered the COME Racing one?

    just been looking at one ( a mate bought for his race car)
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    ^^ Nice manifold but I was told it would not fit under the bonnet with any air filter by Outlaw Speed Shop when I enquired. Be interesting to see how your mate gets on if he doesn't have a scoop.

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    I'll have to check out the COME ones also, I like the look of the torque power manifolds as you can run the heater hoses off them if I wanted to as well. They do a low rise and a high rise dual plane, I think I would be safer with the low rise as I don't wanna cut up the bonnet.

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    Do you ever leave? paulzig's Avatar
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    Quote Originally Posted by RedTaxi View Post
    There is a cheap chinese knock off of a Redline Hi-winder for $250 on ebay (or was) that can also work. It's a low rise single plane.
    Thats what I'd do, at least you keep it single plane.. The hywinder goes under an LX Torana bonnet, I cant see it fouling on an early girl Commodore...

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    Yes the chinawinder goes under any bonnet. I have one, unused. It needs a bit of basic radius blending into the plenum though. 1/2 hour with a grinder will make a decent difference.

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    https://www.redlineauto.com.au/p-113...8-vn-head.aspx

    Are you guys talking about this one??? My engine builder keeps saying to stick with a dual plane manifold as my car is only gonna be driven on the street how will this one compare??

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    Chinese lowrise single plane vs torque power low rise dual plane, really, for a 308 not 355 etc and this needs to be discussed? They were running easy 11's with a 308 and torque power low rise dual over 15 years ago... Don't get sucked in by the big single plane hahaha on that set up.

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    Can you use an air filter base with more 'drop'? Or modify one to suit. So it fits under the bonnet. I have done that more than once, but not on a Holden.

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    Quote Originally Posted by Trvh83 View Post
    https://www.redlineauto.com.au/p-113...8-vn-head.aspx

    Are you guys talking about this one??? My engine builder keeps saying to stick with a dual plane manifold as my car is only gonna be driven on the street how will this one compare??
    Quote Originally Posted by CircuitVK View Post
    Chinese lowrise single plane vs torque power low rise dual plane, really, for a 308 not 355 etc and this needs to be discussed? They were running easy 11's with a 308 and torque power low rise dual over 15 years ago... Don't get sucked in by the big single plane hahaha on that set up.
    Here we go again.

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    Quote Originally Posted by Trvh83 View Post
    https://www.redlineauto.com.au/p-113...8-vn-head.aspx

    Are you guys talking about this one??? My engine builder keeps saying to stick with a dual plane manifold as my car is only gonna be driven on the street how will this one compare??
    Currently running 228@0.50 flat tappet hydraulic with a ported high winder and an open spacer in a heavy car. No idea on horsepower but it is a 355.

    Oh, 8.5:1 compression.

    No issues. Idles fine, runs fine, frightens small children and makes alleged better cars cry on the street.

  13. #13
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    Quote Originally Posted by CircuitVK View Post
    Chinese lowrise single plane vs torque power low rise dual plane, really, for a 308 not 355 etc and this needs to be discussed? They were running easy 11's with a 308 and torque power low rise dual over 15 years ago... Don't get sucked in by the big single plane hahaha on that set up.
    The hywinders are tiny dinky ports, I dont know if I'd call it big by any stretch of the imagination... $500 difference too from a TP dual plane, you can get edelbrock DP's now which are a bit less than the TP I believe..

    The edelbrock pricing for the single and DP have been jacked right up to just over $700 now, so sort of inline with TP, I got one for $550 when they came out
    Last edited by paulzig; 12-04-2019 at 07:39 AM.

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    Quote Originally Posted by paulzig View Post
    The hywinders are tiny dinky ports, I dont know if I'd call it big by any stretch of the imagination... $500 difference too from a TP dual plane, you can get edelbrock DP's now which are a bit less than the TP I believe..

    The edelbrock pricing for the single and DP have been jacked right up to just over $700 now, so sort of inline with TP, I got one for $550 when they came out
    Pauly, have you fitted the Edelbrock single plane to anything yet? Iím curious as to what you think of it and how it performs or compares to whatever may have had previously.
    I just bought one (brand new never used) through a mate for $500 and am looking at using it for my next building a fat plastic.

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    Quote Originally Posted by paulzig View Post
    The hywinders are tiny dinky ports, I dont know if I'd call it big by any stretch of the imagination... $500 difference too from a TP dual plane, you can get edelbrock DP's now which are a bit less than the TP I believe..

    The edelbrock pricing for the single and DP have been jacked right up to just over $700 now, so sort of inline with TP, I got one for $550 when they came out
    Yea I know there smaller but the tp low rise was designed and tested for pretty much the exact specs of the op motor. The extra money will be well spent. More tq and HP everywhere and no dramas with fitment and finish.

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