cam breakin - 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 06-02-2012, 09:23 AM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: B.C. Canada
Posts: 58
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
cam breakin

Checked the cam ( comp xe268h) on my 454 while doing the bottom end, and found some more than expected wear. Will be replacing it with a lunati 60203. About the same duration but more lift. Was hoping to use the old springs which are comp 911-16. How much lift can these springs handle.

They are a single spring, anything that will help the cam breakin.

Comp @50:
intake lift/dur .515, 224
exhuast lift/dur .520, 230

Lunati @50
intake lift/dur .542,227
exhaust lift,dur .554,233

thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-02-2012, 05:25 PM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,658
Wiki Edits: 0

Thanks: 15
Thanked 60 Times in 57 Posts
Just to be on the safe side you are using oil with ZDDP in it I hope?
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-03-2012, 12:50 PM
68NovaSS's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Working with chromed bolts
Last journal entry: New to me T-Bucket
Last photo:
Join Date: Sep 2002
Location: Nine Mile Falls/Suncrest, WA
Posts: 5,285
Wiki Edits: 9

Thanks: 113
Thanked 139 Times in 130 Posts
On those springs the installed height is 1.9", open height is 1.4" and coil bind is 1.2". Get your rocker ratio and do the math or get the info you need from Lunati. BTW, the spring rate is 373#'s and open pressure is 309, pretty stiff to be considered "break-in" springs. A good move with double springs is to remove the inner spring for break-in. Lunati has their own requirements for warranty, check it out.
__________________
Boost adds dignity to what would otherwise be a vulgar brawl...

Midnight Sun Street Rod Association
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-04-2012, 10:41 PM
Registered User
 
Last photo:
Join Date: Apr 2010
Location: B.C. Canada
Posts: 58
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I always use oil additives for the cam. Sounds like I need to use a different spring for breakin.

Thanks
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-05-2012, 06:34 PM
6426yy's Avatar
Member
 
Last photo:
Join Date: Nov 2003
Location: Macomb Il.
Age: 35
Posts: 558
Wiki Edits: 0

Thanks: 1
Thanked 1 Time in 1 Post
Use some OLD stock springs.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-05-2012, 07:14 PM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 60
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 598 Times in 547 Posts
Quote:
Originally Posted by 80ta
anything that will help the cam breakin.

Comp @50:
intake lift/dur .515, 224
exhuast lift/dur .520, 230

Lunati @50
intake lift/dur .542,227
exhaust lift,dur .554,233

thanks
More on cam break in here.
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
Over Breakin inspectorcurly Suspension - Brakes - Steering 1 06-21-2010 09:23 AM
Engine/Cam Breakin jmichaelre Engine 59 10-29-2009 03:07 PM
breakin er in cadillacoffin Hotrodders Site Suggestions and Help 4 01-19-2008 10:12 AM
How long is cam breakin lube good for? fiscus Engine 5 02-02-2007 01:46 AM
cam breakin ? bowtieorbust Engine 9 01-01-2004 02:07 PM


All times are GMT -6. The time now is 02:13 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.