[Brian Baker]

Originally Posted by screamingchief

The lifter should'nt even be riding on that area of the lobe.

Bret P.

Looks to me like the center of the lobe is deteriorated. What are you looking at that tells you the roller is contacting the lobe in the wrong area?

[screamingchief]

Originally Posted by Brian Baker

Looks to me like the center of the lobe is deteriorated. What are you looking at that tells you the roller is contacting the lobe in the wrong area?

From the poor pic quality I could hardly tell if it was a flat tappet cam or a roller,but a bit closer look shows some tracks on the other lobes.

I guess with a quick glance I thought it was a flat tappet cam.

Now we know otherwise...

Is the lobe damage on the opening or the closing side of the lobe?

If it's the closing side of the lobe I'd be checking the spring pressures closely.

What springs are being used on this ?

Seat & open pressures ??

What cam specs ???

What was the lash ?

Bret P.

[john5670]

This is what I think I have. When I find the paper work i will post the exact build.


Valve Springs: Pacaloy Springs 240 @ 1.900
Cam - Mild Comp X-energy
Rockers: Ultra Gold Pontiac 1.5 7/16 Aluminum Rocker Arms with Stud Girdles
Lifters: BPG Solid Roller Lifters
oil restrictors
Pushrods: Chromemoly
Heads - Butler E-heads ported to 330cfm (assembled by Butler w/Ferra race valves)
Intake - Rpm port matched

Dynoed:

586 hp @ 6000 Rpms
575 lbs of torque

[john5670]

The pitting is mostly at open. The picture is blurry. I can take better ones..not on my cell phone. I am going to pull the motor and go through all bearings. The metal most likely is went some where.