I have been testing the rockwell hardness on quite a few sets of all kinds of lifters and the results have been mind blowing if Newk would take those out i will test them and let you know NO CHARGE.
I have never in my whole life seen what i have seen on those lifters,
I will tell a little of the story.
We broke in our engine the same as we always do keeping the cam submerged in oil and 10-20 minutes at 2000 rpms never reving her up in that time.
the lifters disintegrated sending shrapnel all threw the engine.
Now don't get me wrong we have had in a few engines with the CB lightweights that have not failed.
I'm Just woundering if this could be a bad batch.
the test so far have shown that this last set were harder than any previous set (my certified RC tester showed 59.5 RC on the radius which you could add up to 1. more) and the other lightweights that didn't fail were at 56 RC i also measured SLR and the set we had came in at 48 RC and worked bitchen, and an assortment came in at 51 RC.
including a set of experimental ones i made myself.
just seing if there are any issues not bad mouthing any body.
My only idea is that they were to hard and brittle thus why they disintigrated and didn't take out the cam.
kinda like taking you cam to the beach and rolling it around a bit.
or the other thing is fine china so hard you can't scatch it with a steak knife but if you drop it it shatters into a million peices.
we also did a small experamint and that was to hit the edge of a remaining lifter with a small hammer and it broke clean off with a very small blow.
We have not spoken to CB yet about this problem,
I'm into fact gathering first. like i said before not bad mouthing anybody we understand this is a race car/motor and that will likely play into whatever they have to say.
but with that failure it certainly put a damper on our program.
Items hurt, Lifters ($100 with next day air), cam (? haven't got bill yet), bearings($75.), valve job ($150 ?), cylinders($150), pistons($375), rings($120.) and the travel was not cheap even staying with my folks it was still about $800. with gas and entry fees not to even go down the track once.
about $1570. with cam
What do you think CB will do send us a new set of lifters? they can keep them.
like i said before not bad mouthing anybody.