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Horizonjet

  • Karma: +0/-0
Dual or single plane intake???
« on: July 14, 2013, 10:20:11 pm »
I have a mildly built 454 BBC bored out 30 over and good cam and O/T Headers.  I am going to replace factory alum intake to a nice polished air gap one.  Should I go single plane or dual plane and why?  I know one is good for higher RPMS than the other but I am  only turning about 5000 rpms
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72 Horizon BBC

ka0tyk

  • Karma: +30/-0
Re: Dual or single plane intake???
« Reply #1 on: July 14, 2013, 10:25:51 pm »
for marine applications where you usually cruise at 3k and above a single plane manifold IMO is the way to go.  dual plane basically limits 4 cylinders to half the carb, so at lower rpms it keeps the velocity up and turbulence down.  but thats not really needed in a jet boat since anything under 2500-3k you probably cant even ride on plane. 

something to read:

http://www.enginelabs.com/engine-tech/intake-manifolds-single-plane-or-dual-plane/

i have a torker II on top of mine.
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Horizonjet

  • Karma: +0/-0
Re: Dual or single plane intake???
« Reply #2 on: July 14, 2013, 11:22:28 pm »
Thanks for the info. They don't say nothing about jet boats when talking about. That's what I was thinking too. And thanks for the article.

Sent from my DROID RAZR using SoCalJetBoats mobile app

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72 Horizon BBC

Your Mom

  • Karma: +20/-0
Re: Dual or single plane intake???
« Reply #3 on: July 15, 2013, 07:37:48 am »
I have a dual plane performer rpm on my 466(30 over BBF bout 450hp)...works great and looks bitchn. Had a torker on my 460 originally and went performer...no change. Rebuilt my 460 and put Rpm on. Didn't notice any real gain from a single-dual and I have a 18 cruiser. If you have it run it. The weiand stealth from what I've read is a good mani for jets though.

MPKardell

  • Karma: +1/-0
Re: Dual or single plane intake???
« Reply #4 on: July 15, 2013, 09:52:30 am »
I have a mildly built 454 BBC bored out 30 over and good cam and O/T Headers.  I am going to replace factory alum intake to a nice polished air gap one.  Should I go single plane or dual plane and why?  I know one is good for higher RPMS than the other but I am  only turning about 5000 rpms

I'm running a Weiand Stealth on my 10.5:1, 496 BBC with Chineese heads, QuickFuel M-850, mild Lunati roller cam.  It's turning 4700 RPM with a fresh 9.25" impeller in my AT-309 pump.  This is installed in a 22' day cruiser that's used primarily as a ski boat.  I'm very happy with the set-up.  Cruises well, and revs quickly when you put your foot into it.  Beerjet had recommended this to someone else while I was building my engine.  Kudos to him for the recco.
  • Boat #1: 1991 Dana 22' day cruiser
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Horizonjet

  • Karma: +0/-0
Re: Dual or single plane intake???
« Reply #5 on: July 15, 2013, 11:59:47 am »
So I probably won't notice if I run a dual or single plane then. That gives me more options then. Thanks

Sent from my DROID RAZR using SoCalJetBoats mobile app

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mash on it

  • Karma: +29/-0
Re: Dual or single plane intake???
« Reply #6 on: July 15, 2013, 01:43:13 pm »
So I probably won't notice if I run a dual or single plane then. That gives me more options then. Thanks

Sent from my DROID RAZR using SoCalJetBoats mobile app

Dual Planes are for tow trucks and motorhomes, and possibly a low(er) powered mercriuser.
You can 'grow' into a single plane when you want to add some more horsepower, but you are "at the limit" now for dual plane, IMO.

Dan'l
 
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CJ/RR 212...under construction  "Pistol Annie"

 


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