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Old 07-03-2006, 03:03 PM
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Edelbrok TORQUER II divider?

I just saw an old ad about a single plane Weiand manifold very similar to the Edelbrok torquer II but this one had a removeable plenum divider wich claimed to increase street driveability a low rpm's, has anybody ever installed such a device in the edelbrok manifold?
I like my torker II sbc, a lot but I wish I had a little more bottom end, this sounds like a very easy solution, if I loose something on top I don't care it doesn't see much high rpm usage anyway.
please comment.
Augusto.

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Old 07-04-2006, 10:20 PM
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I've never heard of a plenum divider like you mention. But they do make 4 hole spacers that will have the effect you are looking for. CFM Tech can probably help you find what you need.

However, if your hoodline can handle a spacer then you might be better off going with a Performer RPM. The dual plane will get you more bottom end and it's tall enough to keep up with things on the top end.
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Old 07-05-2006, 06:16 AM
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The plenum divider is very common, but I have not seen a removable one. Back in the day we used to modify the Z/28, LT1 aluminum intake by cutting down the divider which gave you a little boost at higher rpm.

Had I only known what those things would be worth today.

Vince
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Old 07-05-2006, 06:33 AM
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Summit sell a Weiand Single plane manifold WND-7546 and a plenum divider
to use with it WND-9008.
Here´s the manifold, no pic for the divider.

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Old 07-05-2006, 08:07 AM
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Quote:
Originally Posted by 302/Z28
Back in the day we used to modify the Z/28, LT1 aluminum intake by cutting down the divider which gave you a little boost at higher rpm.
FWIW, the Edelbrock RPM Air Gap has a cut in the divider presumably for the same effect.
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Old 07-05-2006, 09:49 AM
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Hey Malc, thanks for the pic, this exactly the one I'm talking about, seems quite similar to my edelbrock torquer II, I was wondering if adding that divider wich is nothing but a piece of aluminum sheet into my plenum will enhance the low en performance of my manifold.
Please give some comments.
Augusto.
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Old 07-05-2006, 11:18 AM
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If its just tin floppin around in there wouldn't is cause a vacuum lreak between the two halves.Not a leak per say but kinna like using an open carb gasket on a duel plane intake its not a total seal perside.
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Old 07-05-2006, 12:56 PM
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Quote:
Originally Posted by Augusto
I was wondering if adding that divider wich is nothing but a piece of aluminum sheet into my plenum will enhance the low en performance of my manifold.
Please give some comments.
Augusto.
I think it will. You'll force 4 of the cylinders to draw from the left side of the carb and the other 4 to draw the right. That should bost the vacuum signal to the carb giving more low RPM response.
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Old 07-05-2006, 02:17 PM
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Here´s a load of writin´ about Intake Manifolds explains divided plenums as well.
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Old 07-05-2006, 09:49 PM
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You can see the notches in the mounting face to hold the divider. These dividers were common years ago.

Essentially what it does is divide the single plane intake into a "stagger fire" dual plane intake. The intake pulses are not 180* apart like a true dual plane.

(the long ram Chrysler engines used a similar staggered system where one bank ran off one carb, and the other bank on the other carb.)

The dual plane Performer RPM or Air Gap would produce more power probably.

But a home made divider of .125 alum. installed well is a lot less expensive and might give you the benefits you are looking for.

Take some measurements and drop by the airport shop and get a piece of .125 scrap alum and have fun.

Cutting the divider down on dual planes is an attempt to increase the upper rpm power by creating a pseudo larger plenum under high velocity conditions.

Biggest question is..... what will divider modifications/installations do to fuel distribution? Will some cylinders run too lean? or too rich?

Go Performer RPM/air gap
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Old 07-06-2006, 06:34 PM
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I'm gonna make a divider and see what happens, If I don't like it I'll go with the performer RPM, BTW is this manifold very similar to the famous Z28 high rise of yesteryear? I heard somewhere that Vic bougth the dies from GM to make it, could it be true?.
Augusto.
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Old 07-06-2006, 09:20 PM
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I'm sure we'll all be interested to know how it turns out. Let us know the results when you get the divider in there.
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Old 07-07-2006, 01:22 PM
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malc's reply

I did a speed reading of the website that Malc had referenced. Good reading, but very Edelbrock biased (probably by an Edelbrock designer).

While I did not follow thru with calculations, I gotta comment on their love affiar with air gap manifolds. Flowing at max/WOT, or for that matter, any other throttle opening there is absolutely NO WAY that the air gap will keep anything cool. Residence of the air-fuel mixture in the manifold is much to brief - read miliseconds - for heat (cold) to transfer, i.e. become a denser charge. Unless there is some laminar cooling air being introduced somewhere and mixing with the air-fuel mixture, the temperature will not be modified enough if at all to make a difference. I suspect that the increases in torque and Hp were more due to the fact that the manifold is a bit higher, with longer runners than the Performer and Performer RPM.

With this said, the Air-Gap manifold sure does look purty tho it becomes a chore to keep clean
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Old 07-08-2006, 12:13 PM
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So you don't feel that isolating the intake runners from the 230* oil in the valley makes any difference?

I guess "icing down" of intake manifolds is a falicy also.
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Old 07-08-2006, 12:22 PM
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The Torquer II design was not a popular or successful design due to it's overly large plenum. While it is popular to remove the divider in a dual plane design to gain a little high-end power, putting a divider into a single plane (especially a poor one line the T-II) does not have a similar but opposite effect. The runner design and phasing work against it.

tom
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