Recent content by PRHeads

Trade it now while it’s sealed up.

I think the cam is so mild that anything you do to increase the velocities at the valves will pay off. How much? Only one way to know for sure, but I wouldn’t expect miracles. If you’re buying rockers anyway, the 1.6’s are a free upgrade. Keep in mind that running 1.6+ rockers on E heads often...

I know I wouldn’t be volunteering to be the Guinea pig for that experiment.

You guys are pretty fussy. I mean sh!t……the holes are within an inch or where they should be!

Be interesting to hear just what the repair bill on your Stealths ends up being. Are they going to replace the guides, or put liners in the existing guides?

I haven’t had very many used Stealths in my shop, but I have seen them where they had excessive/severe guide wear(on all 16) with low use. That one set were run with oe rockers and an under .500” lift cam, with maybe a couple thousand miles. Another set were cnc ported back when Modern was...

The seats are so bad from the guides being loose they need replacing? Do you know what the cam & rocker situation was on those heads?

My Wag is the pushrods just weren’t up to the task. Particularly if there is no evidence of fairly substantial pushrod to head contact. Use 3/8”x .080 wall, heat treated for the next go around.

Edelbrock stopped putting powdered metal seats in E-Street heads several years ago. They now use the same ductile iron seats as the RPM heads. In a BBM application, the only parts that are different between the E-Street and the RPM are the valves.

Of course………. If you don’t inspect them, you’re hoping the heads you bought don’t have seats like this: (That one was particularly “nice”)

The thing with assembled heads is, not everyone who buys them has the tools and skill necessary to properly disassemble and evaluate them. If it’s not within your budget(or is logistically not feasible) to have a competent shop give them a once over…….. then you might be one of the people who...

Still comes up no problem on a google search.

Add to the variables……. What the auto machine shop labor costs in your area are. At my shop it’s not hard for the price of reworking factory BBM heads to exceed the cost of a pair of Stealths.

Across the lobe on the base circle is fine. The base circle is where the odd wear line is appearing.

If the OP has any way of doing so, I’d love to know what the lobe taper is on one of the lobes that has the really thin contact line that’s running off the edge, on the base circle of that cam…….