Cam for 460 EFI? EFI - Does it matter? - 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 06-21-2004, 09:15 PM
Member
 
Last photo:
Join Date: Jan 2004
Location: Burnaby
Posts: 79
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Cam for 460 EFI? EFI - Does it matter?

Hi guys,

We are going to rebuild the 460ci out of our '88 F-250. It runs well but only has 130psi in one of the cylinders and burns oil.

Anyways here is the question.

Cam cam cam?

Ive been doing some simulations with desktop dyno to find an appropriate cam. Ive only been looking at Comp Cams due to them having a good description of each one as well as specs etc.

Here are the 3 cams i've been looking at.

The 260H, X4262H and the XE256H.

Now the last one forementioned is under a section called Computer COntrolled.

The 460 is EFI so does that mean that I will have to use this cam? Or will other mild cams such as the 260H work with the stock computer as well?

The truck is mainly used for hauling, towing a 5th wheel, trailers etc. No racing or anything like that. The rebuild will be mild.

So should I just stick with the Cam designed for EFI or are there other options. I would be grateful if you could list some other cams that would work.

Thanks in advance,
Mike
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-22-2004, 06:25 AM
Member
 

Last journal entry: JB's 37 Pickup
Last photo:
Join Date: Oct 2002
Location: Smoky Mountains
Age: 75
Posts: 2,358
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Cam changing on an EFI motor will require a chip change in the computer. Cam has major impact on opening/closing of valves and since fuel and spark delivery is married to this opening and closing event, the computer has to initiate the event at the precise time, or it will run like a dog. An example is ordering a Edelbrock Pro Flo system: they want your cam data in order to provide you with the correct chip for the computer. After installation, the instruction manual provides additives for more cubic inches or subtraction for less cubic inches. The basic system is for a small block Chevy/Ford or big block Chevy?Ford.

Trees
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-22-2004, 06:49 AM
TurboS10's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Auto Terms and Definitions Used in Modern Engine T... Last photo:
Join Date: Sep 2002
Location: Texas
Age: 36
Posts: 3,463
Wiki Edits: 2

Thanks: 0
Thanked 0 Times in 0 Posts
Trees is correct. If you change the cam profile, you will need to reprogram or rechip the ECU so it will properly work with the changes. If the cam profile that you select does not have a preprogrammed chip for it available it will take a custom chip.

Chris
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



All times are GMT -6. The time now is 10:13 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.