need cam for mud truck - Page 3 - 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
  #31 (permalink)  
Old 07-16-2009, 03:52 PM
chevrolet327's Avatar
second place is the first losr
 

Last journal entry: old stlyle holley polished valve cover
Last photo:
Join Date: Apr 2007
Location: quebec,canada
Age: 32
Posts: 204
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by techinspector1
Should work with SCR of 8.75:1 to 10.75:1. 112 degree lobe separation angle should produce more manifold vacuum and smoother idle than a 110 or 108 or 106 grind. It's not the type of cam I might use if I were looking for power in a mud truck. I wouldn't be particularly interested in manifold vacuum or idle quality. I'd probably be looking for a narrower LSA.

Agree with ap72 about the agresssive ramps. If you deduct the advertised duration from the 0.050" duration, you get 43 degrees on the intake and 41 degrees on the exhaust. This is pretty radical, so on a cam like this, I'd resist using other than a stock 1.5 rocker ratio.

Think about it this way: If there is a total of 41 degrees difference between 0.006" tappet lift and 0.050" tappet lift, that means that (given a symetrical lobe) there is 20.5 degrees of difference on each side of the lobe (20.5 on the opening ramp, 20.5 on the closing ramp). That's in crankshaft degrees. If you convert that to camshaft degrees, that means that the lobe is lifting the tappet from 0.006" off the base circle to 0.050" off the base circle in just 10.25 degrees of camshaft movement. That's on the ragged edge of geometric feasibility without having the edge of the tappet digging into the cam lobe.

In my opinion, putting this kind of stress on the valvetrain parts for a very small gain in power is ludicrous.
do you have a good recomman dation for my setup

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #32 (permalink)  
Old 09-01-2009, 04:12 PM
chevrolet327's Avatar
second place is the first losr
 

Last journal entry: old stlyle holley polished valve cover
Last photo:
Join Date: Apr 2007
Location: quebec,canada
Age: 32
Posts: 204
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i have change my torque with a 2400 stall 10 inch and i also have give 4 degree avance on camshaft and change the edelbrock 750 for a truck avenger 770
incredible difference that what i looking for thanks for the help
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
lt1 cam swap in tbi 350 slammedchevy1500 Engine 13 12-14-2008 04:50 PM
I need cam help 355s10 Engine 5 03-16-2008 06:34 PM
94 chevy truck runnin' like poo! bluesmanjesse Engine 11 11-09-2006 03:54 PM
Diesel truck, should I buy it??? 1931 steve Hotrodders' Lounge 4 08-07-2006 08:34 PM
Oddball Cam source? Biggarmike Engine 3 02-02-2003 11:52 AM


All times are GMT -6. The time now is 09:47 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.