Jack, you are welcome. I certainly don't want to step on your toes if this is not what you want to hear.
Your engines/your call!
Just an FYI on the engine build:
You'll receive an array of "Nah Sayer" comments regarding the quench or squish effect when you speak with some machine shop owners. These will from the ones who just simply think
within the box, and who run with the pack!
So be prepared, and arm yourself with some of the great information provided by DennisMoore, and many others (if you were to research this further).
If you think that this build has merit to it, and if you were want to go this route, don't let anyone tell you differently, and don't let them tell you that the cost is prohibitive.... it is not!
Also best to use a machine shop whos owner has first hand experience and ownership of a cruiser type boat. He will better understand Marine load Detonation potential.
Many of these articles on Detonation have been written by auto enthusiasts, and are not limited to the SBC wedge style cylinder head...., but the principles used to combat this apply even more so for our SBC Marine engines.
It's all about Detonation potential and controlling it best we can.
Again.... this is not to be confused with a high performance mod, in as much as it has to do with Detonation control.
Dennis Moore's info is not web site hosted, so you'll need his book.
This is a great article by Jeff Smith on the Squish or Quench Effect and how to achieve it.
Here's one By Larry Carley
Here is an article by stealthfti, not necessarily pertaining to the SBC wedge head, but he nicely explains squish waves.
Here's one by Bob Hewitt, who does not touch on the Q/E or Squish Zone, but does touch on Detonation and the difference between Detonation and Pre-Ignition.
John Erb writes this article Again, mostly auto related, but nicely applies to our SBC marine engines.
BTW, the SBC full dished piston was a result of the 70's emission control for autos and trucks. Prior to that, the F/T was the common choice.
GM stayed with the Full Dished piston due to their Bean Counters, and combustion chambers becoming smaller/runner size increasing over the years, etc.
The cost to do this better suited build, should be minimal if you use the right suppliers.
No other major changes are required.
Both the SBC Chevy and Chrysler wedge head boys have been doing this for years.
Have fun with it, and good luck!
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