Several questions here Barry, The fact your motor is more than a EMC dyno-war horse and has seen street/strip duty makes this even more pertinent. I noted you and I believe all other EMC competitors were shown as runnning Amsoil 5W20. ....................Running 5W20 in an FE?
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Got me wondering if you designed/clearance'd your EMC FE motor for thin 5w20 oil?...... Or is this a more power on dyno EMC "shoot-out oil only" that gets swapped out for the more common weights we see run in FEs for street/strip? ......... Or hard to ask and likely more difficult if not impossible to answer, perhaps this is a marketing lube?.....
Finally I would have sworn at one time in EMC you ran a Perf RPM with a deeply notched divider wall or have you always run the Blue Thunder with the deeply notched divider? ............ One time or another someone made/posted a Perf RPM with a removable divider wall that clouds the issue.
I'm just going to throw out the position FoMoCo is in at EMC. The 1st and 2nd place Engines this year were Mopar Gen III Hemi's, the 3rd and 4th place Engines were LS7 head based LS engines. 5th of course was Jon Kaase with a Frankenstien like 429SCJ block (de-bored) to a measly 3.70 bore and crazy long stroke to make 409 cubes with his own Boss 429 Heads somehow breathing through the 3.70 bores - lets not forget Boss 429s pushing 600-700 cubes are not all that uncommon so a 409 version made that small is especially complex.
No one can dispute that Detroit's big three strive to develop extremely efficient engines today that off the showroom make astonishingly high TQ/HP. The heads of both the Mopars and Chevy's are their latest offerings. These make an outstanding base for building an efficient EMC engine as the top four places indicated. Ford on the other hand dropped pushrod motors nearly twenty years ago. Last year EMC 4-valve DOHC Fords cleaned house and are now banned at EMC. Those winning Ford heads of last year are decades older then what the winning Mopar/Chevy guys now run with. Obviously the latest Ford heads that go head to head with the LS7s and GenIII Hemi's on the street and dealer showrooms are the Coyote and any chance of using them at EMC is zero. A first at EMC this year was a competitor running a 1960's Cam-A-Go to vary his OHVs cam timing. Lord help them if the stock Coyote DOHC's variable cam timing AND variable overlap ability could show up where HP and Torque are scored as at EMC! FYI there are no longer air-pumps and EGR systems on Ford Coyote's - all handled simply by the computer and cam positioning!
I noted an abundance of essentially off the Perf shelf bolt on intakes with production heads/blocks from the winners yet EMC for the Ford guys by banning what Ford puts on the street are screwed. They don't get the opportunity to use those state-of-the-art heads & blocks from Detroit.