9 to 1 Piston for EQ 62cc Head

wishihadahemi said
ok, so the 405 has a different pin height, lowering the piston..... i didn't check all the numbers, thanks....but that's what i want is tight quench top and bottom with fuel mixture compressed only into the chamber. that's what is making these modern LS , Hemi,ect..... make power. "The keys are heads with quick-burn combustion chambers, optimal quench achieved with near-zero deck heights, an aggressive cam ground to Brandes’ specs, and careful carburetor and ignition tuning.Brandes explains, “I try to achieve around 0.040-inch quench. That’s about what a modern LS-series motor has. Spark-plug positioning in the chamber, slightly biased toward the exhaust valve, is also critical."Article i found in Hot Rod Magazine. ( my old Street Stock Barracuda W-2 360,was fast... my 2nd year wasn't that good, i just do Hobby Stocks with my Kids now)

View attachment 1715132319

Cool beans on the racing. I like it. Man, I gotta laugh at the 'modern LS' thing..... seriously, I read pretty much the same thing 45 years ago in Hot Rod and Car Craft.....except without the 'LS' in the articles. Built my 1st engine (a 351C) with TRW quench dome piston, that closed off one side of the open chamber 2 BBL Cleveland head. A bit over 10:1 when I hogged out the chambers a bit more. Good engine and no detonation issues as long as I kept the timing advance under control.

Seriously, you will get what you need from quench from one side. What is not well explained is that a big part of fighting detonation is just from using small chambers. That mention of 'quick burn' chambers is just from them being small; you get that right from the smaller chamber.

And in essence, with your block decked by .012" (as it sounds like it is), then the ledge all around the KB232 piston top is going to come up to right a zero deck... like you said. So with a .039" gasket, and milling off ALL of that pad, you are going to have 2x quench. Now you are back to that SCR issue. You 're gonna need to get about 4 cc's out of the chambers or the dish or both. 4 cc's is not a lot to mill out of that dish, maybe .030"..... Seems like you have what you need expect some machining.