351W Edelbrock RPM head porting? - Page 2 - 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
  #16 (permalink)  
Old 08-24-2008, 01:33 PM
Registered User
 
Last photo:
Join Date: Jun 2008
Location: USA
Posts: 1,172
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
Quote:
Originally Posted by oldbogie
You really need better pistons.

The problem with circular dish pistons is a lack of squish/quench in the combustion space.

a fundamental engineering flaw in the combustion chamber because of the piston crown shape.

flat portion of the head as close as reasonable somewhere in the zone of .050 to .060 inch including the distance the piston sits below the head deck, and the head gasket thickness. Bogie
Chevy piston squish bands are only 3/8 inch wide.
Small block Ford pistons are made with a 3/4 inch wide squish band. The dish is only 2 1/2 inches diameter.
This wider squish band on the Ford pistons is an advantage in that with most heads MOST of the squish effect is retained. That is why SBF have better detonation resistence.

Shoot for .040-.050 squish distance on the SBF.
You might check with Edelbrock and see if the thin .025 copper head gaskets will work with the alum heads.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 

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
Edelbrock Performer RPM Air Gap Manifolds Help leejoy Engine 14 10-22-2007 07:12 PM
need info on Edelbrock rpm performer and.. ryork Engine 4 09-22-2007 04:23 AM
Cam Help black66 Engine 3 05-12-2003 06:15 PM
Sportsman II Head Porting bigjoedo Engine 3 01-05-2003 09:34 AM
Head porting and polishing MonteCrl Engine 1 10-22-2002 03:40 PM


All times are GMT -6. The time now is 12:23 PM.


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.