302 cam help

[homegrownranger]

Well I finally got my motor running better today and took the valve covers and noticed the cam is wore bad. Its not getting as much compression in those cylinders that the cam is the most wore in. Now Im getting a cam but not sure what to get. I want it to be recreation and towing. I have a 69 mustang 302 with stock heads edelbrock performer intake and 600 cfm carb. Any help would be great.

 

[baddad457]

Read what I posted about this in your other thread.

 

[85_Ranger4x4]

A flat cam doesn't decrease compression.

Either valves that are not sealing or rings that are not sealing do.

 

[baddad457]

A flat cam doesn't decrease compression.

Yes, it will. If the intake valve isn't opening, then you're not drawing in anything to compress. And at the other end of this, if the exhaust valve isn't opening, that will increase compression to the point where it'll backfire thru the intake valve when it opens. Seen this happen with two cams that wiped lobes on break-in.

 

[allnpt0]

Well I finally got my motor running better today and took the valve covers and noticed the cam is wore bad. Its not getting as much compression in those cylinders that the cam is the most wore in. Now Im getting a cam but not sure what to get. I want it to be recreation and towing. I have a 69 mustang 302 with stock heads edelbrock performer intake and 600 cfm carb. Any help would be great.

Edelbrock 2122 should be a good match for your intake. Make sure you use the break in lube when you install the cam. Coat the cam with moly lube and put the break in lube in the oil. The zinc will help prevent premature wear on the cam lobes.

Pete

 

[85_Ranger4x4]

Yes, it will. If the intake valve isn't opening, then you're not drawing in anything to compress. And at the other end of this, if the exhaust valve isn't opening, that will increase compression to the point where it'll backfire thru the intake valve when it opens. Seen this happen with two cams that wiped lobes on break-in.

Usually at work it seems by the time it is flat, it is usually a shot engine that drags it into the shop and the cam is a secondary "while you are there" thing.

We don't get a lot of whiped cams, people don't switch cams around in their tractors that often and since most are diesels the diesel oil still has the additives in it for flat tappet cams.