Issue is I have little to no info on the heads. They are procomp heads and I’m running Harland sharp roller rockers. Had someone look at it and determined the heads had the wrong springs. New springs were purchased and I’m having the same issue where it bends push rods but this time it bent a pushrod, knocked off a valve spring, dropped a valve and kissed the piston. The piston looks ok but I would much rather swap out these heads for something reliable and maybe more reputable. The only positive about these heads were they cc’d to ~84ccs and knocked the compression down to make it a little more street friendly.
Yeah and he charges several thousand dollars to build a set of heads capable of that. Matter of fact he won't even do them without up front payments because people realize 1/2 way through the job they're wasting money
I was just stating what they ARE capable of. All the rest is just dramatics.
Okay, yeah sounds like there's plenty of issues there. @MidnightSwinger might be able to steer you in the right direction.
Sort of but those capabilities aren't really close to what real world dudes can get out of them.
My porter in Warner Robins could. He's that good. I'm sure there are others. Unfortunately, after my last slant 6 head, he swore off cast iron forever. lol
Yeah if the right short block, cam and induction is there a "not the best head " can still make really good power
The cam is huge, I’m thinking there is a piston to valve issue. I know with my flat tops in the 383 just below zero deck,clears with the MP .528.
I don't mind doing port work on iron, don't have to worry about getting stabbed to death by the sharp shards from aluminum. If only a nice atomizing finish could be made in cast iron like aluminum with a burr finish
It is a “street” car. I’m not looking to daily it or go on long trips. Just some local cruising stuff and shows
Can you post a picture of the heads and rockers?
So the previous owner of this engine ran worked 906s before a bolt got dropped And wrecked the head. He then switched to Indys. As I stated up top i got little to no info on the current head and the compressed thickness on my HG is .040
Unfortunately I have no close ups on anything as it’s not at my house. Here’s what I have on had. All I know is that they are ProComp heads, ~84cc. We had measured the valves at one point but I can’t remember the size off the top of my head. COMP 924 springs (Valve Springs, Dual, 1.509 in. Outside Diameter, 347 lbs./in. Rate, 1.175 in. Coil Bind Height), Harland Sharp roller rockers .650 offset, 1.5 ratio and COMP Mag push rods 8.710”
So i would probably redegree in you're cam.
Nothing wrong with those heads, just get them set up correctly and check everything in mock up
That's going to be a bad *** dart too
He's retired and his head porter son is sculpting metal antlers now.
That 906 head could never be duplicated
Sure it can. They can do it.
