Intake swap: dual plane airgap to single plane ? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 09-18-2009, 11:00 AM
Registered User
 
Last photo:
Join Date: Mar 2008
Location: NC
Posts: 237
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Intake swap: dual plane airgap to single plane ?

Having a potential issue with my professional products crosswind (clone of edelbrock airgap); it is a a dual plane air gap design. Going to swap it out for a used Weiand which I was told has an open plenum with divider plate...I believe this is a single plane. Looking up the Weiand intakes I beleive it is the X-celerator (also told it has the accesory holes for the A/C bracket); this is the only intake I can find that matches thes specs...also this intake is "free".

Question is I rather not keep swapping intakes and if this solves the problem, than great !! However I am concerned that I will sacrifice some low end performance. My current setup is 383 stroker, Holley 750cfm, Comp Cams XE262H, 4 spd with 3.08 posi. What sort of performance decrease can I expect changing from a dual plane air gap to a single plane ? Thanks.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-18-2009, 11:13 AM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,996
Wiki Edits: 326

Thanks: 768
Thanked 1,027 Times in 859 Posts
Quote:
Originally Posted by y2k600f4
Having a potential issue with my professional products crosswind (clone of edelbrock airgap); it is a a dual plane air gap design. Going to swap it out for a used Weiand which I was told has an open plenum with divider plate...I believe this is a single plane. Looking up the Weiand intakes I beleive it is the X-celerator (also told it has the accesory holes for the A/C bracket); this is the only intake I can find that matches thes specs...also this intake is "free".

Question is I rather not keep swapping intakes and if this solves the problem, than great !! However I am concerned that I will sacrifice some low end performance. My current setup is 383 stroker, Holley 750cfm, Comp Cams XE262H, 4 spd with 3.08 posi. What sort of performance decrease can I expect changing from a dual plane air gap to a single plane ? Thanks.
In my experience, you can expect the motor to be soggier from idle to 3500/4000. With that short cam and tall gear, I would use a RPM or Stealth. The cam is gonna sign off at somewhere around 5500/5600 anyway, so giving up area under curve from idle to 3500/4000 doesn't seem to me to be the smart way to go. Now, if you had more gear and more cam, then a single plane might make sense, allowing more area under curve from 3500/4000 to redline. Just my opinion.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-18-2009, 11:21 AM
Registered User
 
Last photo:
Join Date: Mar 2008
Location: NC
Posts: 237
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
In my experience, you can expect the motor to be soggier from idle to 3500/4000. With that short cam and tall gear, I would use a RPM or Stealth. The cam is gonna sign off at somewhere around 5500/5600 anyway, so giving up area under curve from idle to 3500/4000 doesn't seem to me to be the smart way to go. Now, if you had more gear and more cam, then a single plane might make sense, allowing more area under curve from 3500/4000 to redline. Just my opinion.
Thanks...that was what I was afraid of. Don't really want to give up anything off idle, since this build was targeting the low end. I am guessing my builder is trying to do me a favor by giving me one of these intakes he has laying around in hope to fix my potential intake leak ith the PP.

By chance will using a plenum divider plate help out some in my application ?

Last edited by y2k600f4; 09-18-2009 at 03:40 PM.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-18-2009, 05:31 PM
ericnova72's Avatar
More for Less Racer
 
Join Date: Jan 2007
Location: S.W. Lower Michigan
Age: 47
Posts: 9,413
Wiki Edits: 0

Thanks: 29
Thanked 473 Times in 430 Posts
This particular intake is not that bad for an old single plane, but make sure you use it with the divider as it will help low end a lot. This intake(Wieand Accelerator #7546 w/divider) has been out of production for close to 10 years, so it may not have enough material to cover some of the newer +.100" raised intake ports. Check before you just bolt it on. If it will work, I would use it as a test to rule out head problems and then replace it with a new piece geared toward your build if the problem is solved.

The PP Crosswind, and the Typhoon(dual planes), come up in a lot of problem threads around the web, strangely the PP Hurricane(big single plane) hardly ever. Have used the Hurricane without problems, but know a friend that had driveabilty issues on his street rod using a PP Typhoon dual plane(non air gap like an Performer) and took the polished PP intake off and put the Performer back on and the hot start and sputtering problems went away.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-18-2009, 06:42 PM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,153
Wiki Edits: 0

Thanks: 5
Thanked 380 Times in 374 Posts
You will give up significant low end grunt right wher you do the most of your driving. Why not address what ever is really causing the intake manifold leak and use the Dual plane manifold.

Installing a plenum divider in the single plane manifold will not restore the lost low end power compared to a dual plane. If the motor is mild you should be using a dual plane with a fully divided plenum anyways.

Fix the intake you got. Or get another dual plane manifold.Not the cast off old junk your machinest has hanging around that he wants to unload on you. Don't assume it's the intake causing the problem. The heads intake mating flange could be out of wack also.

My Professional products crosswind intake manifold fits like a glove and makes big power. (I didn't even need to port match it to my heads) I've used both edelbrock and the PP on the same motor even.
The edelbrock RPM air gap has a more pleasing appearance of the as cast outer surfaces, but the fit and machining is the same.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 09-18-2009, 07:02 PM
Registered User
 
Last photo:
Join Date: Mar 2008
Location: NC
Posts: 237
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Don't assume it's the intake causing the problem. The heads intake mating flange could be out of wack also.
This time I will be there working with the builder...yea not too happy about giving up the dual plain. I guess the goal is to take some measurments (one being the compressed gasket) and he has special measurement tool to measure surface angles etc this time really want to nail down the problem. While I got things apart going to take a look at the rocker studs if they go into the intake ports going to remove and reseal. I guess "if" this not ideal manifold fixed the problem than I can always replace it later on...just want to nail down the problem.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 09-18-2009, 10:27 PM
OLNOLAN's Avatar
Registered User
 
Last photo:
Join Date: Apr 2009
Location: Louisiana
Posts: 1,048
Wiki Edits: 0

Thanks: 399
Thanked 102 Times in 84 Posts
Git R Done

You Go Man, I'm starting to hear some Tenacity in your words. We want video when you get it running right. olnolan
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 09-19-2009, 05:11 AM
Member
 
Last photo:
Join Date: Feb 2005
Location: chillicothe oh
Age: 47
Posts: 1,445
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
The weiand will work just fine for ya for now.It is a good intake I would be willing to bet due to it's runner size you will be hard pressed to feel a dif. down low and just may find some power when on the hammer.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last 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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dual plane manifolds and spread carb. jetting? ForceFed86 Hotrodding Basics 5 08-07-2009 01:54 PM
Carb gasket dual plane intake to 4 BBL D. Newland Engine 3 09-26-2008 04:36 PM
help with a cam choice powerrodsmike Engine 24 07-30-2006 10:42 PM
Torker vs. Performer da gas junkie Engine 20 12-30-2004 09:49 AM


All times are GMT -6. The time now is 07:05 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.