Forwarded from Dan Courtney…. Mike Sent from my iPhone Begin forwarded message: From: Dan <dan@excaliburre.com> Date: March 1, 2025 at 20:57:50 PST To: Mike Drew <MikeLDrew@aol.com> Subject: FW: Heads Mike, I tried posting this last night but did not see it in today’s email. Did you see it? Dan PS: Watching USF play Gonzaga on ESPN right now. Go Dons! From: Dan <dan@excaliburre.com> Sent: Friday, February 28, 2025 9:18 PM To: 'detomaso@server.detomasolist.com' <detomaso@server.detomasolist.com> Subject: Heads Well, I’m getting The Winged Warrior back together. Finally. The short block is done, with flat top pistons. I have multiple options on heads. The objective is a fast road trip car running pump gas. Not City driving, but open highway. No track use. That department is (well) taken by “The Beast”. I’ve been told to keep compression around 9.5:1 with cast iron open chamber heads, 10:1 with closed chamber heads or 10.5:1 with aluminum heads, like Performer. I have multiple sets of open chamber 2 bbl and 4 bbl cast iron heads plus 2 pairs of closed chamber 4 bbl heads. I also have a set of polished 2 bbl open chamber heads with 4 bbl valves. According to Summits compression calculator with .040 head gaskets I’ll get 9.5:1 open compression with 76 cc heads, 11:1 with 64 cc closed chamber heads. Originally I was planning on using the modified 2 BBL open chamber heads and keeping my 2 bbl headers but I’m now getting “drawn” to the 64 cc closed chamber 4 bbl heads. Mainly because I’m itching to put the Webers back on and so I’d need 4 bbl heads. The nice thing is with .080 head gaskets the compression drops to 10:1. I’ve head the closed chamber heads allow for cleaner fuel ignition so you can run up to an extra point compression? Then again, aluminum heads tolerate even more compression and reduce weight. But I don’t have any of those sitting around (yet). Suggestions? Dan Courtney La Jolla, CA [1]Dan@excaliburre.com (858) 337-7019 cell References 1. mailto:Dan@excaliburre.com