PRH said

I don’t have any notes from that set of heads, but who’s to say they had the same springs on them as your heads?

I do remember the open pressures seemed way lower(solidly under 300 open) than what you’ve posted yours are.

I have another set I’ll be working on before too long.
We’ll what those end up being like.

What part number heads did you buy?

Click to expand...

j par said

thank you, I did remember you saying a couple had to be shimmed or something like that? It'll be interesting to see how broad the spectrum is on these... it surely would seem they would come from the same box..

Click to expand...