4/7 swap - 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 06-17-2008, 06:03 PM
Registered User
 
Join Date: Sep 2006
Location: Missouri
Posts: 71
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
4/7 swap

on a small block chevy is the 4 7 firing order swap worth that much power or torque? Also with the improved quality of poly locks are valvle lash adjustments still required if the engine doesn't see alot of 5500 plus hits on mechanical solid?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-17-2008, 06:22 PM
Stroke Meister
 
Last photo:
Join Date: Mar 2007
Location: MI, USA
Posts: 704
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Quote:
on a small block chevy is the 4 7 firing order swap worth that much power or torque? Also with the improved quality of poly locks are valvle lash adjustments still required if the engine doesn't see alot of 5500 plus hits on mechanical solid?
There are a few 4/7 swaps that work great... depending on the application. What CI, heads, intake, CR, trans, gear,usage?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-18-2008, 12:26 AM
327NUT's Avatar
Registered User
 
Last photo:
Join Date: Dec 2004
Location: So. Utah
Age: 67
Posts: 3,202
Wiki Edits: 0

Thanks: 0
Thanked 64 Times in 58 Posts
If you do a search you'll see that the 4/7 swap is basically intended for multi carb BIG inch race motors.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-18-2008, 06:58 AM
Double_v23's Avatar
Horsepower Enthusiast
 

Last journal entry: Finished BMOD001FH
Last photo:
Join Date: Jul 2007
Location: Mooresville, NC
Posts: 1,495
Wiki Edits: 0

Thanks: 0
Thanked 4 Times in 4 Posts
The 4/7 swap is designed to help out with the harmonics of the firing order, with less vibration comes more HP. However, if the rest of your rotating assembly and valve train isn't top notch stuff and fully balanced within half a gram then it is a waste of money to do the 4/7 swap.

I have a solid roller on my BBC with a set of arp 12 point rocker nuts with poly locks I only adjust them about once every year. And usually they aren't even out of adjustment.
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
C4 tailshaft swap? 70chevyc10 Transmission - Rearend 1 07-06-2007 06:49 PM
Cam swap Questions wayfast77 Engine 3 10-18-2006 04:52 AM
Found this site looking for swap info Roadrod Introduce Yourself 1 11-07-2004 10:16 AM
4/7 swap cams? KeithB123 Engine 4 02-20-2004 06:06 AM


All times are GMT -6. The time now is 10:26 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.