Intakes: Single Plane vs. Dual Plane - Vintage Mustang Forums
Vintage Mustang Forum
HomeForumGalleryClassifiedsAbout UsAdvertiseContact Us
» Auto Insurance
» Featured Product
Go Back   Vintage Mustang Forums > General Discussion > Vintage Mustang Forum
Vintage-Mustang.com is the premier Ford Mustang Forum on the internet. Registered Users do not see the above ads.
Reply
 
Thread Tools
Old 03-18-2003, 03:53 AM   #1 (permalink)
Senior Member
 
Join Date: May 2001
Location: Kansas
Posts: 804
Send a message via ICQ to Flyinford
Default

Hello

One more question for everyone:

What in the world constitutes a single plane or dual plane intake? Also, what are their advantages/disadvantages and for what types of engines are each best suited for. THANKS AGAIN

__________________
When you aren't looking for it,
You ALWAYS find it

http://www.flyinford68.homestead.com...ustangBack.JPG
1968 Mustang Coupe 1972 Honda CB350 1972 Honda CL100 1987 Dodge Ramcharger
Flyinford is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-18-2003, 07:08 AM   #2 (permalink)
Senior Member
 
abadtb2's Avatar
 
Join Date: Jun 2001
Location: SoCal
Posts: 5,368
Default

A Dual Plane Intake will allow more bottom end and torque. A Single Plane Intake is a High RPM piece.
__________________
http://memimage.cardomain.com/member...78_36_full.jpg
Mark Brown/San Diego
abadtb2 is offline   Reply With Quote Quick reply to this message
Old 03-18-2003, 08:55 AM   #3 (permalink)
Senior Member
 
Join Date: Jan 2003
Location: Nashville, TN
Posts: 263
Default

For best results, use a single plane on primarily race only engines and a dual plane intake on performance street engines. For more information and pictures check out www.edelbrock.com.
drmach is offline   Reply With Quote Quick reply to this message
Old 03-18-2003, 10:39 AM   #4 (permalink)
Guest
 
Posts: n/a
Default

In a dual plane there is a split down the center of the chamber the carb bolts to. What this does is seperate the intake runners to the heads into 2 sides. A single plane is open under the carb and all 8 runners feed from that area. For the most part dual planes make better low torque and less top end HP, single planes are better for high end HP and running at high RPMS. Most of the time street cars gain from low end torque (get moving grunt basically) than from top end HP. But I recently changed from a vintage dual plane cobra intake to a modern single plane weiand and got a 40hp difference at the wheels in the top end with a bunch more space under the curve across the rpm band. It also moved my peak HP up about 500 rpms, but I also got more torque out of it too. Not saying this will happen in all situations as it depends on your motor, but I was amazed.
  Reply With Quote Quick reply to this message
Old 03-18-2003, 02:22 PM   #5 (permalink)
Moderator
 
Join Date: Mar 2001
Location: West Virginia
Posts: 1,037
Default

Actually theres more to it than the divided plenum, you can have split plenum single planes as well. Dual planes are what they are because one side of the plenum has a higher floor than the other side, aka different planes. Single planes all 8 runners feed off the same level within the plenum.

Single planes are also perfered for forced induction setups, as well as large nitrous shots when using a plate (you can direct inject it and it doesn't matter).
__________________
-Jason

'70 Cougar
'72 Mach 1
"Thats not a leak, my car's marking its territory!"
"If you've done it, it ain't braggin'." -Roy Rogers
nosaj122081 is offline   Reply With Quote Quick reply to this message
Old 03-18-2003, 03:08 PM   #6 (permalink)
Guest
 
Posts: n/a
Default

I thought they were dualed for the purpose of having a smaller chamber to draw from and not have as much volume drop when getting the air to start moving. the dual level is the only way to make that happen without having several cylinders drawing off the same bank as I understand it. The single plane is a more straight through design (closer to a tunnel ram if you will) so you get more up high power out of it. But I will never say that all that is not hearsay or that I am remembering it wrong.
  Reply With Quote Quick reply to this message
Old 03-18-2003, 04:10 PM   #7 (permalink)
Senior Member
 
gfmccann's Avatar
 
Join Date: Jul 2002
Location: Brantford ON, Canada
Posts: 1,859
Default

Jumping in here... Point of clarification: All dual plane manifolds are likewise dual plenum. However, the opposite is NOT the case. Dual "plane" manifolds are also called "180 degree" manifolds. These will have the plenum floors at two different levels because each plenum feeds 2 cylinders on each side of the motor (4 total)... the differing "planes" allow the intake runners to pass over/under as they cross to the other side. The "180 degree" name is because this intake runner configuration allows each plenum to feed cylinders at evenly spaced intervals of 180 degrees crank rotation. If you consider the firing order of a typical V8 you'll see that a non-180 degree dual "plenum" manifold will have a rather eratic pattern for drawing intake charge. I believe the Holley "Street" Dominator was a dual plenum of this type, except that there was a balanceing port at the rear intended to equalize intake pulses. At any rate, for the street, a 180 degree dual plane intake will generally work best.

-- Gord
__________________
Currently running a warmed-over 302...
http://forums.vintage-mustang.com/fo...tang-Small.JPG
Driven every day!
gfmccann is offline   Reply With Quote Quick reply to this message
Old 03-18-2003, 04:15 PM   #8 (permalink)
Senior Member
 
Join Date: Jul 2000
Location: Central California
Posts: 10,514
Send a message via ICQ to camachinist Send a message via AIM to camachinist Send a message via Yahoo to camachinist
Default

recently changed from a vintage dual plane cobra intake to a modern single plane weiand and got a 40hp difference at the wheels

That's a pretty impressive change, considering the typical improvement when transitioning from a stock iron manifold to most aftermarket ones. What is the build-state of your engine? I noticed, on a stock long-block, a fair difference going from a stock iron dual plane to an OEM Cobra dual plane but it was nowhere near what even 20 RWHP would do. IME, at the track at least, the dual plane combos, while sometimes a bit slower (no more than .08-.1 seconds) have been more consistent. Using a high stall converter (over 4K) brought the single planes I've used into this consistency range (.05 or less repeatablility). Current W has a Performer RPM on it and I've been pretty satisfied with its torque band and repeatability. Makes good power into the 6.5K range without sacrificing the low end, since I've been using a much tighter 10" converter (3.2K flash).

BTW, although I don't have access to a engine/chassis dyno, I do have extensive track time with most of Edelbrocks's single and dual plane products over the last 25 years. Guess I'll be looking at Weiand on some future projects. Thanks for the tip...
__________________
http://forums.vintage-mustang.com/signaturepics/xsigpic18756_2.gif.pagespeed.ic.3vzsIY6Mah.jpg
Visit my VMF lingo page
Visit the Ford engine torque specs page
Visit my MySpace Blog
camachinist is offline   Reply With Quote Quick reply to this message
Old 03-18-2003, 04:50 PM   #9 (permalink)
Guest
 
Posts: n/a
Default

I think that was kinda what I was understanding about the dual planes...just don't know enough to describe it that well.

@cam...

I chased all over the place and was not getting the power that I should have out of the car. This was using a mustang dyno. I tuned the car (carb and dist) on the dyno and got all that I could out of it. With makeing no other changes with the exception of up jetting the carb changed to the weiand x-cellorator and saw that amount change. I could not believe it myself. 4 speed car. Its a ford 345 horse 302 with the x heads, b303 cam, long tube headers, 2.5 flowmaster setup and holley 650dp. The dyno printouts are here:

http://madmaxstuff.com/carstuff/mustang/mustangjet.jpg

I don't have my old one right now, need to scan it still.

  Reply With Quote Quick reply to this message
Old 03-19-2003, 09:58 AM   #10 (permalink)
Senior Member
 
imBOSSter's Avatar
 
Join Date: Feb 2003
Location: North Central Indiana
Posts: 1,112
Default

I have a 351C I am rebuilding, so I've spent a lot of time at the 335 engine series forum... The Weiand gets a lot of recommendations over there as being very streetable for a single plane with a nice broad torque band. There is a Pantera guy who just posted a build for a customer using a Comp Cams 282S & an Edelbrock Performer. The horsepower topped out around 375 - 380 IIRC. The builder said he tried to talk him into the Weiand; said with just the manifold swap he would have been over 400 in both hp & torque... sounds good to me.
__________________
-Doug-
69 Mach 1 - 351C - TKO
http://www.comteck.com/~dgentry/Avatars/d6k9g.jpg
imBOSSter is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Vintage Mustang Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are Off


Powered by vBadvanced CMPS v3.2.2

All times are GMT -4. The time now is 01:30 AM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.