Intake Manifold Choice on 355 - 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 08-26-2011, 07:00 PM
Registered User
 
Join Date: Aug 2011
Location: Tennessee
Posts: 13
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Intake Manifold Choice on 355

I am building a 355 I have 6" rods,73 cc heads, Comp Cam XE268,and just wondering if the Edelbrock Rpm Air Gap is my best choice?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-26-2011, 11:58 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,867
Wiki Edits: 326

Thanks: 750
Thanked 972 Times in 820 Posts
In all the DynoSim programs I ran, a high-rise, dual-plane intake made the most power between idle and 6000. Here's a rundown on 'em. Air gap manifolds were not considered in this article....
http://www.crankshaftcoalition.com/w...e_manifold_SBC
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-27-2011, 01:27 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by grundy
I am building a 355 I have 6" rods,73 cc heads, Comp Cam XE268,and just wondering if the Edelbrock Rpm Air Gap is my best choice?
The AG is slower to warm up, and it's biggest "advantage" over the non AG RPM is the cut down plenum divider. You can duplicate the cut down plenum divider on the regular RPM yourself if you choose to, plus save a few bucks in the process over the cost of the AG RPM.

Take a look at the video HERE. It compares the AG to the non AG, etc.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-02-2011, 03:55 PM
Registered User
 
Join Date: Aug 2011
Location: Tennessee
Posts: 13
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks guys you were very helpful and after looking into it they are about the same. I have a guy melling my plenum as I type.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-02-2011, 04:30 PM
bentwings's Avatar
bentwings
 
Last photo:
Join Date: May 2002
Location: St.Paul, Minn
Age: 72
Posts: 1,796
Wiki Edits: 0

Thanks: 0
Thanked 16 Times in 15 Posts
I lived in Tenn for a while so I know how hot it gets there. Air Gap RPM's are fine a blistering hot day at full throttle. That's about it however. 99.---long decimal % of the time you are just cruising at part throttle. AG RPM's without heat riser ports simply run too cool to give proper fuel vaporization and distribution. The milled divider works fine but it is still cold blooded. Somewhere there was a side by side test and there is ony a few (like 7 hp) difference between the AG RPM and the standard RPM and only at the very top of the scale.

I have one and ran it briefly on my 355. It worked great after about 50 hours of messing with it and another $100 worth of squirters, jets, cams and secondary springs. It's sitting under the bench now having been replaced with a 6-71 and 2 750 dp that ran out of the box quite well. After an equal 50 hours of messing around I get better mileage and about 150 hp to boot. I couldn't imagin trying to run the air gap at 10 deg F. The blower works fine...about a pound more boost too.
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
Head and Intake Choice Ricer Eater 78 Engine 6 05-20-2011 03:59 PM
Engine build intake manifold choice Badazz93 Engine 4 02-28-2011 04:28 PM
Intake Manifold Choice? Please Help sb72elcamino350 Engine 3 06-04-2005 05:58 PM
O2 sensor bung placement/ manifold choice williambartram Engine 12 12-19-2004 12:31 PM
Intake manifold gaskets for alum. heads and intake mustang66maniac Engine 6 02-20-2004 11:19 AM


All times are GMT -6. The time now is 02:54 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.