Cam button?
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
Cam button?
I was reading David Vizard's book on building small block Chevy and he
said that with roller cams some sort of "cam button" have to be used.
What exactly is this cam button?
I didn't recieve any with LPE 219 cam when I ordered it.
He also said that without this "cam button" timing can be influenced :confused:
What do you think this is and can I install cam without it?.
Thanks!
[Modified by Sliding, 10:47 PM 7/25/2003]
said that with roller cams some sort of "cam button" have to be used.
What exactly is this cam button?
I didn't recieve any with LPE 219 cam when I ordered it.
He also said that without this "cam button" timing can be influenced :confused:
What do you think this is and can I install cam without it?.
Thanks!
[Modified by Sliding, 10:47 PM 7/25/2003]
Team Owner
Joined: May 2002
Posts: 24,337
Likes: 25
From: San Diego , CA Double Yellow DirtBags 1985..Z51..6-speed
Re: Cam button? (Sliding)
I don't know the details, but it basically holds the cam in place. if the cam slides forward from thrust on the distributor gear, it will retard the spark timing I believe. I also think this only relates to rollor cams, since the lobes are supposedly flat, not tapered, and don't position the cam the same as one with non-roller lifters.
:lurk:
But then again, I've never pulled a cam, so take it for what it's worth. :p:
[Modified by CentralCoaster, 2:01 PM 7/25/2003]
:lurk:
But then again, I've never pulled a cam, so take it for what it's worth. :p:
[Modified by CentralCoaster, 2:01 PM 7/25/2003]
Drifting
Joined: Feb 2002
Posts: 1,952
Likes: 2
From: Little Rock Arkansas
Re: Cam button? (CentralCoaster)
Cam buttons are used to set camshaft endplay (or thrust) on standard block engines...A roller cam block like those found in 87-up Vettes use a thrust plate for the stepped nose on late model cams and don't require a thrust button...
-Jeb
-Jeb
Thread Starter
Drifting
Joined: Jun 2001
Posts: 1,625
Likes: 1
From: Zagreb, Croatia
Re: Cam button? (jburnett)
Cam buttons are used to set camshaft endplay (or thrust) on standard block engines...A roller cam block like those found in 87-up Vettes use a thrust plate for the stepped nose on late model cams and don't require a thrust button...
-Jeb
-Jeb
Drifting
Joined: Mar 1999
Posts: 1,931
Likes: 1
From: Norcross GA
Re: Cam button? (Sliding)
During normal operation, the distrib gear pushes the cam toward the WPump.
Non thrust plate cams can use a button on the end of the camshaft that hold the cam in place. i.e. No cam walk. Less chain wear. Steady ign. Steady VTrain.
This button is place in the center of the cam gear. It presses againt the timing chain cover, so the cam is held in place. Cheap versions are made of brass. Expensive version have a bearing. Does the same,... just cost more.
Non thrust plate cams can use a button on the end of the camshaft that hold the cam in place. i.e. No cam walk. Less chain wear. Steady ign. Steady VTrain.
This button is place in the center of the cam gear. It presses againt the timing chain cover, so the cam is held in place. Cheap versions are made of brass. Expensive version have a bearing. Does the same,... just cost more.
