I've measured the lobe center on this cam several times and it comes out at 107deg instead of the 112deg it shows in the specs. Does this mean I have to advance the cam 4 degrees to get it right or what? Chuck in NH

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Just guessing but it sounds to me like you have the wrong cam or specs?? Not sure where your getting the 4 degrees either?

Just call me 'Dick'

The cam was supposed to have a 112deg lobe center. Since I run a McCulloch it was recommended that I try 4deg advance for initial setup. Someone else mentioned getting the having the same problem with lobe center on the RPM300. I just wondered if it affected the amount of advance. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Chuck,

      I'd be callin Isky or ask Ted if that's where you got it. The amount of advance or retarding of the cam has no effect on the lobe centers. Both lobes move at the same time when you advance/retard the cam. The 112 degrees would probably work better in a blown motor than 107. Less overlap equals better cylinder filling in a blown motor.  

Frank/Rebop

Bristol, In ( by Elkhart) 

How did you measure it?

Oldmics

Degree wheel and micrometer. Measured it many times and it came out the same. Tried it a 50degrees and 20 degrees (thats whats on the cam card). Same results. I bought the cam from Glen. Its new in the box. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

If the card says 112 and you get 107 you want to retard 5*. That is if you want it to be as the card reads.  Now remember if it is ground on 112* lobe centers and you have 107* on the intake that means your exhaust will be @ 117*.  I'm not sure of the way you are checking it but maybe this video will help.  You know I like the YouTube.

bla bla bla

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

Tim,

Thats exactly the way I'm doing it but with a few more cylinders. It seems the RPM300 has an error on the cam card. Ted recommended 4 deg advance on the cam for my engine. Is that affected by the change in lobe center or should I still do 4 degrees? Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Chuck,

         We may be (I may) confusing the termanology here. Lobe Centers are the difference between the intake and exhaust points of maximum lift. In crankshaft degrees. That is ground into the cam and cannot be changed except by regrinding the cam. If you are checking the difference between those points on your cam, it should work out to 112 degrees.

         If you are looking for a lobe centerline, that's the relationship to the crank of a particular lobe. Usually intake. That can be changed with offset keys or an adjustable pulley. If that's what you're trying to do, then do exactly what Tim and Ted are telling you.

        I'll shut up now before I confuse the issue further.

Frank/Rebop

Bristol, In ( by Elkhart) 

Let me ask it this way, If the Lobe Centerline is reading 107deg. with the crank advanced 4deg. is the Centerline 111deg?

This is from the cam card.

LOBE CENTER:

112 deg.

OVERLAP:

46 deg.

CAM ADVANCE:

0 deg.

THE ABOVE TIMING IS CHECKED AT	.020	(OPEN) LIFTER RISE
	.020	(CLOSE)

My impression is that the 112 deg. represents the centerline and thats what I've been having problems with. My reading are 60 and 154 or 214=107Deg.

I guess my question is will this cam be ok to run on my 292 with blower? I really don't have the time or funds to get another one before Columbus. Chuck

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire