The cam is still not the problem though. It just needs properly degreed and it will run as it should.

 

agreed

I was told to properly degree the cam the heads have to come off right?

 

no just take the number one cylinder rocker arms off and set your dial indicator on the pushrod

 

ok
gotcha
I’ll try that and report back
I appreciate everyone who posted and helped out.
thanks guys

 

So after changing injectors and checking the cam timing, nothing has changed. The cam timing was not over advanced and the injector spray pattern didn’t affect the timing. So while it’s half apart I’m putting in a btr stage 2 turbo cam, push rods and double springs and call it good for now.
we will see if this new cam will allow more timing with less cylinder pressure at peak torque.

 

What where the numbers you came up with degree wheel?

 

Are you doing this work yourself? Doesn't really sound like it, so I'd get in there and check the plugs yourself. Could just be a game of telephone and someone installing stuff made a mistake. And those LSA injectors should run decent at steady state; it's the transitions that make them awful. So good thing getting them out of there either way. People have been putting them in all kinds of stuff because they are cheap take-off items but they're awful for anything that doesn't have an LSA blower. Just get in there and pull some plugs. Detonation at super low spark advance assuming proper fueling almost always means preignition. Plugs are your most likely source.

To correct a misconception...you will not have excess cylinder pressure with an advanced cam at high RPM. If that worked, nobody would be retarding the camshaft. Your max potential cylinder pressure drops off very sharply with an over-advanced cam at high RPM because you're giving the air less time to fill the cylinder. Back in the early days of the internal combustion engine they tried to close the intake valve exactly at bottom dead center. Everything made garbage power and revved worse than a modern diesel. They played with cam profiles and everything changed.

 

i am not doing the work. The person that looked at it recently is not the same person that installed the cam the first time. we did buy a degreeable cam gear this time.

Im running br7 plugs gapped at .028.
shouldnt be an issue.
Its possible the cam was not ground correctly I guess