Guys,


A block and its internals. The crank is on the front passenger floorboard.


Look at that hone….

Gotta get it all to the builder now.


The virtually brand new machine the work was done on. Nothing more than a 4 axis CMC bed mill, really, set up specifically to do engine blocks. But it’s still pretty cool. I didn’t get a pic of the honing machine, but it’s pretty cool, too. It can hold +/- .0002” size and taper. Again, pretty cool to me when my interests and profession intersect.


Also got the ACR circuit buttoned up today.

Starting to work on fuel plumbing next.

Thanks. Brad.

The new honing machines are pretty big step up. Sense the rotating resistance etc.

Looking good.

Brad, are you still running the stock lifters with dog bone style roller lifter alignment?

​​​​Not trying to bust your &@!!s here...just seeing some potential factors.

The factory rollers with dogbones only have 0.570" lift before they have issues with the alloted travel on the machined surface for the dogbone retainer. Essentially they can come out of the dogbone on a small base circle from a high lift cam. Different perspectives on this. Some say max lobe loft of 0.350"...some 0.375". Either way...a need to know.

Did I miss that you're getting new lifters too?

One of everything .. I`m jealous !!!

Tartilla,

Builder mentioned a long time ago that we don’t need to address lifters as long as they are in good shape, which they are. Again, that was before discussing a new cam. My math says .369” lobe loft on the exhaust. I’ll run it by him. Well back off the cam numbers if it’s gonna be an issue.

Thanks. Brad.

..messed up my edit. Oh well. Lol.
Basically it said…
Many have used the gm dogbones on the old crane cam cams up to .610/.632 …..but yeh, always ck in case.

I would buy new lifters. Even if old ones are good for the application. I would go with Johnson’s. Cheap insurance.

I know everything adds up in cost doing this build, but I too would go with new lifters. Have seen many fail in many different engines for various reasons. Who wants to tear an engine down to replace them, seems like somewhat cheap insurance to keep from ripping motor apart later.

Not to mention you're asking these used lifters to perform at their maximum effort. What would the inspection plan be to ensure the cam/lifters are healthy?

Perf GM BBC stock lifters are not that much $$.

Then you could sell your used cam/lifters as a set. Recover some $$. If they are gtg...then they have value. Otherwise...they aren't worth putting in with a higher intensity cam.

Guys,


This is a .365” lobe loft cam. We are looking at .369”. There’s somewhere in the .050-.100” range clearance at apex.

Thanks. Brad.