[Stan Weiss]

Anything to update?

Stan

[TAQuest]

Originally Posted by Stan Weiss

Anything to update?

Stan

It's cam break in day.

[TAQuest]

Break in procedure completed. There is some lifter noise. Small tick.

[TAQuest]

Lunati says to check lift and see if it lost any.

[TAQuest]

Started it up again to see what it sounds like. Not really a tick. More like just a little more valve noise than I'm used to with the small cam that was in it. Could this be normal? Do big cams make the valves make more noise? Would there be a sound change after moving to a bigger cam?

[pastry_chef]

Originally Posted by TAQuest

Would there be a sound change after moving to a bigger cam?

Can you post a video?

[TAQuest]

Video link;

https://share.icloud.com/photos/05b1...r_Township,_MI

[TAQuest]

https://share.icloud.com/photos/0KBt...r_Township,_MI

[steve25]

Are you push Rods all spinning well by 1200 rpm?

[TAQuest]

I haven't taken it back apart. Trying to decide if this is normal or not. Thanks for the great suggestion. It will be my first stop if I take it back apart.

[TAQuest]

Here is a link to a video where I put my phone right on the valve cover. Normal, not normal, any thoughts? https://share.icloud.com/photos/00pa...r_Township,_MI

[TAQuest]

Now I'm getting a backfire out the intake. Video link to that below;

https://share.icloud.com/photos/0rvT...r_Township,_MI

[TAQuest]

Took the covers off and everything looks normal. No lock nuts backed off. All the nuts have pools of oil in them.

An intake pop like that just about has to be springs.

[pastry_chef]

From the video I don't hear excessive valve train noise.

Intake pop could be ignition timing off, lean A/F or poor valve adjustment.

[TAQuest]

Originally Posted by pastry_chef

From the video I don't hear excessive valve train noise.

Intake pop could be ignition timing off, lean A/F or poor valve adjustment.

I tried changing the timing and the intake backfire did not change.

The valves are adjusted properly. Not that hard and I took my time.

Doesn't seem like a carb adjustment. Seems like the valves are not getting held on their seats since the cam change. Didn't backfire before the cam change.

The springs are an unknown.

What would be the best springs for this application?

[Steve C.]

"The springs are an unknown"

I thought it was stated at the very start of all this they were the valve springs as delivered from Edelbrock !

.

[ta man]

Pull the plugs and check them all,double check all of plug wires for tightness on distributor and plugs. What is your timing set at ?

[johnta1]

This is a hydraulic cam?
Adjustable locking nuts on rockers?


I'd back each intake adjuster nut off by 1/2 turn and see what it does?

[Steve C.]

Regarding the valve springs. You stated the cylinder heads were, quote.... "The heads are pre-assembled ones"

And weeks ago I suggested they were the single valve springs with no damper, p/n 5767.

If in fact they are installed at 1.800" then Edelbrock rates them at 120 lbs on the seat. And as already suggested they should of been tested.


.

[TAQuest]

I checked all the easy stuff.

The heads were bought back in 2003 by the previous owner who is deceased. I can't ask him if the springs were changed. Even if they are original they are unknown.

What I would like to do is change the springs to something that works with these heads and the cam. Something better than what was on these heads originally.

I have one recommendation earlier in the thread. Can I get some confirmation on that? Thanks.