Cam Confusion - 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 09-13-2010, 08:12 PM
Registered User
 
Join Date: Sep 2010
Location: Picayune,Ms
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Cam Confusion

I have a 351w and want to bump it up a little, not sure what size cam i should use. the engine is stock and has a stock cam, the intake is a Wieland steath with a 600cfm elderbrock carb. i would like to add a cam that is good on the street and performs on the track as well. not looking to turn 10's in the quarter but at least burn the tires a little. Oh the engine is mid 70's, and in a 90' mustang with a 5 speed.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 09-13-2010, 08:21 PM
Custom10's Avatar
my KARMA ran over my DOGMA
 

Last journal entry: SS
Last photo:
Join Date: May 2009
Location: Saskatchewan, Canada
Age: 49
Posts: 1,067
Wiki Edits: 0

Thanks: 10
Thanked 21 Times in 19 Posts
Stock heads I assume? most fords will benefit from a dual pattern cam, that is to say that the lift and duration are higher on the exhaust side. Headers are one very good adder here as well. What is the rear end gear ratio? There are many factors in cam selection, many here can add way more than I on this subject but thats my 2 cents for now cheers.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 09-14-2010, 05:01 PM
Registered User
 
Last photo:
Join Date: Apr 2007
Location: Seattle, Wa
Posts: 6,427
Wiki Edits: 0

Thanks: 3
Thanked 327 Times in 284 Posts
Quote:
Originally Posted by glduke
I have a 351w and want to bump it up a little, not sure what size cam i should use. the engine is stock and has a stock cam, the intake is a Wieland steath with a 600cfm elderbrock carb. i would like to add a cam that is good on the street and performs on the track as well. not looking to turn 10's in the quarter but at least burn the tires a little. Oh the engine is mid 70's, and in a 90' mustang with a 5 speed.
The problem with more cam is lack of compression, these two walk together. The cam should be somewhere around the equivalent of a Comp 268 to 272 for the street. with a cast iron head the compression should come up around 9 to 9.2 with your stock heads. With GT40 iron heads off an Explorer you can push that to 9.5.

Bogie
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 09-14-2010, 07:17 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: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 595 Times in 545 Posts
I do not know if a "mid-70's" 351W will qualify- but there were Ford engines made during the smog era, that were saddled w/timing sets (both OEM and OEM-type replacement) that retarded the cam timing.

Some were a significant amount- on the order of 8. So if your engines has this type timing set, change it to a good aftermarket timing set, w/o the cam retarded. This will help regardless of what cam you choose to run.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 09-14-2010, 07:26 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,192
Wiki Edits: 326

Thanks: 590
Thanked 755 Times in 645 Posts
Quote:
Originally Posted by cobalt327
I do not know if a "mid-70's" 351W will qualify- but there were Ford engines made during the smog era, that were saddled w/timing sets (both OEM and OEM-type replacement) that retarded the cam timing.

Some were a significant amount- on the order of 8. So if your engines has this type timing set, change it to a good aftermarket timing set, w/o the cam retarded. This will help regardless of what cam you choose to run.
The 429/460 was the worst. We used to order chain sets for a '68-'71 429 to get the correct pieces. Of course, if you're degreeing the cam like you're supposed to, then you will catch this stuff.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 09-14-2010, 08:38 PM
Registered User
 
Join Date: Sep 2010
Location: Picayune,Ms
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Cam confusion

I was looking at a comp cam thumper kit 268/272,comes with new timing set and lifters, springs. wanted to make sure that was what most would use in my shoes, as far as lift goes i should stay under .500 right?
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 09-14-2010, 08:40 PM
Registered User
 
Join Date: Sep 2010
Location: Picayune,Ms
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by glduke
I was looking at a comp cam thumper kit 268/272,comes with new timing set and lifters, springs. wanted to make sure that was what most would use in my shoes, as far as lift goes i should stay under .500 right?
I do have headers (BBK), and the rear is stock not sure yet on ratio but will check
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 09-14-2010, 08:57 PM
Dirty Biker's Avatar
Bold As Love
 
Last photo:
Join Date: Aug 2010
Location: In my van, down by the river.
Age: 38
Posts: 378
Wiki Edits: 0

Thanks: 1
Thanked 0 Times in 0 Posts
Did you try a free trial of engine analyzer pro 3.9 yet? Punch in the data and see for yourself what it has to offer in the way of tuner suggestion. It is fun imo!
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 09-15-2010, 10:01 PM
Registered User
 
Join Date: Sep 2010
Location: Picayune,Ms
Posts: 4
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
thanks

Quote:
Originally Posted by Dirty Biker
Did you try a free trial of engine analyzer pro 3.9 yet? Punch in the data and see for yourself what it has to offer in the way of tuner suggestion. It is fun imo!
fun program...
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
Vacuum reading with new cam sbc 350 eric32 Engine 17 09-05-2010 05:37 PM
Cam tight on insertion 70bird Engine 12 12-27-2008 07:51 PM
roller cam selection for my monte ss redbandit98 Engine 37 06-21-2008 10:39 AM
Cam button length/clearance..? mrdreex Engine 1 04-12-2008 10:17 PM
Cam Selection and Dynamic CR Arcuden Engine 10 03-23-2008 11:03 AM


All times are GMT -6. The time now is 02:19 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.