cam help - 460 Ford Forum
Chilly's Garage A place for non-460 banter.

User Tag List

 
LinkBack Thread Tools Search this Thread Display Modes
post #1 of 4 (permalink) Old 03-01-2009, 08:42 AM Thread Starter
Member
 
Join Date: Jan 2006
Location: Magnolia,Texas
Posts: 99
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
cam help

ok this is not on my 460. its a 292 yblock. its 60 over and 9 to 1 comp manual trans. im looking for something fairly mild. im new at cam stuff. was curious how lobe center affects low end power. lookin at a isky cam 270 duration .448 lift 112 lobe center 228 at 050. is lobe center and lobe seperation the same? I see grinds similar to this and they vary from 106 to 112. some show lobe seperation at one degree then different centerlines for intake and exaust. trying to learn how to make better cam choices. thanks.
62galxe is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 03-01-2009, 11:25 AM
Senior Member
 
Homespun91's Avatar
 
Join Date: Jan 2006
Location: Peoria, IL...more or less
Posts: 708
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
 
I'll give this a shot. No expert on cams, but I do know something about Y blocks. A couple of things for you...

Did you rebuild the engine, or do you know who did? The reason why I ask is that nearly all Y block pistons have a very low compression height, and a low deck height in terms of where the piston top ends up in the bore....and they nearly all are wildly optimistic in terms of rated compression. It normally takes a healthy cut off the block deck, and the heads, for that matter, in order to actually reach whatever rated compression the piston maker lists.

What I'm getting at is that, if you haven't actually done the math, so to speak, you likely have much less compression than 9:1, even with the .060 overbore,... which will make a difference as to cam selection.

Another thing to look at- although much less common- is that occasionally, guys will run across the HD292 from the '61-'64 heavy trucks. These are considered desirable because of the steel cranks and slightly heavier main webs. What is not commonly known, however, is that they use shorter rods & different pistons...and those pistons have a taller compression height & are not available nowadays. If a regular 292 piston is used, it sits waaay down in the hole at TDC. I've seen this a couple of times...the engine ends up around 7:1.

Not doubting your skills if you put it together, just mentioning a couple of areas to look at.

In terms of your original question , no, lobe separation & lobe center are not the same thing. Lobe separation refers to the distance between the intake lobe centerline & the exhaust lobe centerline. Can't physically change it. The lobe centerline is an imaginary line that goes through the cam's center axis (from front to back), through the point of max lift on the lobe.

You can move the centerline's relationship to other things around, by advancing or retarding the cam.

Mike

IN: Staring adversity in the face while working on your car and coming out on top

OUT: Finally realizing that every $%&# thing you touch on your car turns to adversity

Last edited by Homespun91; 03-01-2009 at 11:29 AM.
Homespun91 is offline  
post #3 of 4 (permalink) Old 03-01-2009, 03:19 PM Thread Starter
Member
 
Join Date: Jan 2006
Location: Magnolia,Texas
Posts: 99
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
 
im putting it together. the deck wasnt cut but it has the small chamber "G" heads.
62galxe is offline  
 
post #4 of 4 (permalink) Old 03-01-2009, 09:49 PM
Senior Member
 
Join Date: Oct 2006
Location: fargo, nd
Posts: 1,656
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
 
what are you intending to do with the y block? that [email protected] is not going to give a very smooth idle... so if youre doing any work with it or have it going into a heavy vehicle its probably not going to be very nice to drive on the street... may also not make enough vacuum for accessories... its no 460

just another dual quad 545 :-)
darrin1999 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the 460 Ford Forum forums, you must first register.
Please enter your desired user 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:
OR

Log-in










Thread Tools Search this Thread
Show Printable Version Show Printable Version
Email this Page Email this Page
Search this Thread:

Advanced Search
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome