Cam Characteristics Help - 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 08-21-2012, 10:45 AM
ajbcc2's Avatar
Registered User
 

Last journal entry: frankenstude too
Last photo:
Join Date: Oct 2006
Location: Ma.
Posts: 129
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Cam Characteristics Help

this cam has been recomended for my 31 coupe, it has, 1969 466 lincoln mtr., roller adj. hyd lifters, w/ 4spd and 2.73 gears.... Intake specs:opens 32, closes 72, tdc overlap 70, lift .545, dod 284. exhaust: opens 78, closes 38, lift 545, dod 296.. what will be the characteristics of this cam...any help will be appreciated.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 08-21-2012, 10:51 AM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,636
Wiki Edits: 0

Thanks: 364
Thanked 857 Times in 819 Posts
very mild cam,what other equipment are you using with it? that cam should have nice manners in a big engine
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 08-21-2012, 05:57 PM
ajbcc2's Avatar
Registered User
 

Last journal entry: frankenstude too
Last photo:
Join Date: Oct 2006
Location: Ma.
Posts: 129
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
i told the builder i wanted a lumpy idle but enough vacuum to run my brakes..with what your saying it sounds like its not enough lope..dang! The vehicle is a med weight 1931 5 window coupe. ( about 24-2500 lbs guesstimate)adj roller rockers w/ guide plates, bored .030 over, rear axle ratio is stock 70 LIncoln at 2.73's. It has a top loader 4spd, 2" headers, 3' lake pipes with auger style baffles installed. N-50 tires for the rear and F78 14's in the front. A Weiand Stealth Manifold with no carb picked yet.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 08-21-2012, 06:10 PM
vinniekq2's Avatar
Registered User
 
Join Date: Jun 2012
Location: BC,Canada
Age: 56
Posts: 8,636
Wiki Edits: 0

Thanks: 364
Thanked 857 Times in 819 Posts
hydraulic cams sound lumpier than solid counter parts.I prefer the extra power to the lumpy sound. closer lobe displacement angle makes a choppier idle.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 08-22-2012, 06:01 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,284
Wiki Edits: 0

Thanks: 5
Thanked 399 Times in 393 Posts
The LSA is 110. What is the cam duration at .050"?
From the cam card.
What cam is this?
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 08-22-2012, 06:34 AM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,284
Wiki Edits: 0

Thanks: 5
Thanked 399 Times in 393 Posts
The LSA is 110. What is the cam duration at .050"?
From the cam card.
What cam is this?

Never mind I found it.
This Erson "TQ40H" cam is fairly mild.
220 -228 @.050"

It will not have a rough racey idle if that is what you want.

If you want a rough idle you would want
a different cam
Try Erson cam #E260526 "HI-Flow III H"

316-316 .545 .545 108LSA

This cam has 240° @.050" intake and exhaust duration
108LSA and the same .545" valve lift.
For best results the cam should be degree'ed in and
installed on a 104 intake C/L Thats 4° advanced.
Do not guess, degree it in.

It will have the rough idle and will need the distributor recurved.
24°-26°@idle 34 to 36° @ max advance. (short,limited 10-12deg advance curve)

The idle will be plenty choppy.
use a 750 holley or 750 Edelbrock carb

rough idle, good power from 3200 rpm up may want to increase the rear gear ratio.
http://www.pbm-erson.com

Another good similar cam choice with a rough idle
would be a Comp Cams "Thumpr Cam"
comp cams #34-601-5 287TH-7 Mutha Thumpr"
Degreeing it in is recomended. This cam already has the 4deg advance built in,
when properly installed.

Some of the Ford engine timing gear sets are retarded.
Degreeing in the cam is always recomended with these motors.
www.compcams.com

This mutha thumpr cam will need the same distributor curve modification.

Last edited by F-BIRD'88; 08-22-2012 at 06:44 AM.
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:
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
350 bored .060 over... XE268 cam, I didn't put a CAM BUTTON IN!!! Dizturbed One Engine 12 08-08-2010 09:50 AM
Cam bearings 350 chev, cam wont fit in front bearing???? JD's camaro Engine 5 02-07-2008 04:33 PM
Roller Cam Install - Cam Button & Timing Cover Help leejoy Engine 10 12-01-2007 05:28 PM
characteristics of old f-100's Iwanttolearn Hotrodding Basics 13 02-07-2005 09:33 PM
Cam: Calculate LCA (cam°) from lobe center angles (crank°)? pgtr Engine 2 09-14-2004 08:28 PM


All times are GMT -6. The time now is 07:42 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.