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Old 11-19-2005, 22:01   #1 (permalink)
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single & dual plane manifolds

just quickly can someone teach me wot is sinlge plane and dual plane is, and where are they're best suited for

cheers
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Old 11-20-2005, 00:08   #2 (permalink)
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Re: single & dual plane manifolds

Dual plane means that the area on the manifold under the carby (the plenum) is divided into 2 sections (dual). One side feeds 4 cylinders, the other half feeds the other 4. It gets a little spaghetti like under there, ie: when feeding 4 cylinders, there will be 2 on the left and 2 on the right.

On a single plane the plenum area is wide open and feeds all 8 cylinders.

The other version of the single plane manifold is the individual or single runner. See pics below.

Generally the dual plane manifolds promote more torque down low where as the single planes are better suited to higher revving performance motors. They have a straight shot into the heads.....the dual planes become restrictive. ie: Dual plane goor for 1000-5500rpm, Single 2000-7000, Single Runner 3500-8000 these are rough numbers and vary between manifolds.

Dual Plane (Edelbrock Performer)


Single Plane (Weinad Xcelerator)


Individual runner design


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Old 11-20-2005, 04:47   #3 (permalink)
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Re: single & dual plane manifolds

hey cheers mate, that was a good effort putting the pics up for us. i had figured that it was something todo with the sections of the manifold, its a bit of common sense to work it out. i jus needed to ask so i have my own knowledge of what i need, i &%^&in hate buying something and being sold the wrong equipment.

can you enlighten me on cams. big & small, i'll take a punt while i'm at it

big- more duration time to suck more in

small- ??? how is good for torque
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Old 11-20-2005, 04:53   #4 (permalink)
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Re: single & dual plane manifolds

Quote:
Originally Posted by F100kls

small- ??? how is good for torque
It doesn't mean it will have "more" torque than the bigger cam, but rather have its torque at a lot lower rpm than the bigger cam.
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Old 11-20-2005, 05:05   #5 (permalink)
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Re: single & dual plane manifolds

ok small cam for torque in the lower rpm, how? i've got my brain wrapped around that one but i'm stumped
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Old 11-20-2005, 05:10   #6 (permalink)
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Re: single & dual plane manifolds

No probs

Here's some good reading on the topic of cams.

http://www.cranecams.com/?show=faq&id=2
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Old 11-20-2005, 05:29   #7 (permalink)
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Re: single & dual plane manifolds

nice one trublu, i'll be reading that a few times over to let it sink in.
wot other links have ya got that i can gain from

cheers
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Old 11-20-2005, 05:47   #8 (permalink)
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Re: single & dual plane manifolds

Here's the Comp Cams one.........this index page is all links to their catalogues.

http://www.compcams.com/Technical/CurrentCatalog/

http://www.crowcams.com.au/Camtypes.shtml

You can email these guys all your car info and what you want with ref to performance and they'll recommend a few cam grinds for you.
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Old 11-20-2005, 05:55   #9 (permalink)
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Re: single & dual plane manifolds

hey thanks again i'll try to put the info to some good use
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