cam replacement - 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> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 01-28-2013, 09:15 PM
Registered User
 
Join Date: Jan 2013
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
cam replacement

I am replacing the cam in a 351c 4v with a
High Energy 268H Hydraulic Flat Tappet Camshaft & Lifter Kit
Lift: .494''
Duration: 268
RPM Range: 1500-5500
Part Number # 249-CL32-221-3

How do I make sure my intake and carb match up andwork well with this type of cam.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 01-28-2013, 11:13 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,067
Wiki Edits: 0

Thanks: 322
Thanked 783 Times in 749 Posts
post the parts and see who says what and why.Post your expectations
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 01-28-2013, 11:25 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,947
Wiki Edits: 326

Thanks: 760
Thanked 1,013 Times in 849 Posts
You cannot intelligently choose a camshaft for a motor without knowing the static compression ratio of the motor.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 01-30-2013, 02:13 PM
33Willys77's Avatar
Registered User
 
Join Date: Jan 2013
Location: Wisconsin
Posts: 406
Wiki Edits: 0

Thanks: 7
Thanked 57 Times in 55 Posts
Taking a wild stab (not knowing anything about the motor) - a good dual plane intake and a 600 maybe a 650 cfm carb.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 01-31-2013, 07:46 AM
Registered User
 
Join Date: Nov 2011
Location: Virginia
Posts: 705
Wiki Edits: 0

Thanks: 0
Thanked 75 Times in 75 Posts
That cam is not suited for Cleveland 4-V heads. Not nearly enough duration to make it "work". The car will run MUCH better across the range with 2-V heads (that cam). Are they '70 ("quench") or '71-newer heads?

4-V heads are not really the hot lick for a street engine. We get much more "usable" power (in the operating range of a street engine) with 2-V heads, with large valves installed. No porting necessary, just a little "blending".

The strong point of the Cleveland 4-V is it's ability to rev. With only 218 @ .050" lift, RPM can't approach the sweet spot. BTW, it's better to list the "@.050" duration for a semi-accurate comparison to other cams.

Cleveland heads, not unlike BBC heads, "like" more lift than the average. With the 4-V heads, you should have a minimum of 230 @ .050" and .550" lift, to make the heads "work". You should also have at least 6 degrees more duration on the exhaust side. Clevelands are exhaust-impaired.

An open-plenum works very well for high-rev engines. For that cam, I agree, a dual plane (like Performer) is the better choice, but again, we're back to "which heads?".

IMO, Cleveland is far and away the best small block Ford for high-end performance. Apparently Robert Yates agrees... Built correctly, Cleveland is a GREAT engine.

Jim
Reply With Quote Quick reply to this message

Recent Hotrodding Basics 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
cam bearing replacement hemi joe Engine 10 08-11-2010 07:40 PM
cam replacement hemi joe Engine 20 01-08-2010 01:35 PM
Cam bearing replacement gatliff Engine 7 03-19-2008 05:34 AM
Comp Cams 268XE cam replacement JamesRS Engine 27 04-07-2007 02:18 PM
383 replacement cam questions Wings Engine 4 06-10-2004 09:03 AM


All times are GMT -6. The time now is 07:24 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.