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04-19-2021, 12:20 AM | #1 |
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Location: Anaheim California
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Milling Snyder 6.0 Head
Has anyone had any experience milling the Snyder 6.0 head for more compression?
How did you mill it and what would you guess the compression is? Richard Anaheim CA |
04-19-2021, 06:47 AM | #2 |
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Re: Milling Snyder 6.0 Head
Since no one else has responded, I will say this. Yes, I resurface each 6:1 head I install, -but to your question, not to necessarily increase compression. I resurface them to obtain a better surface finish, and to ensure the deck is truly flat. As for compression, I can cc it for you but in all likelihood you would only see a marginal increase of probably less than 0:1.
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04-19-2021, 08:04 AM | #3 |
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Re: Milling Snyder 6.0 Head
Worth noting that, overall, milling heads to gain compression is a tradeoff at best. You get the compression, but at the cost of further shrouding the valves – which didn't have great flow to begin with. So performance at high RPMs will be reduced compared to a head that's been designed to have that CR from the beginning.
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04-19-2021, 08:48 AM | #4 | |
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Re: Milling Snyder 6.0 Head
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04-19-2021, 06:57 PM | #5 |
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Re: Milling Snyder 6.0 Head
Brent, are the Snyder heads that far off that they need to be checked?
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04-19-2021, 07:50 PM | #6 |
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Re: Milling Snyder 6.0 Head
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04-19-2021, 08:04 PM | #7 |
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Re: Milling Snyder 6.0 Head
Unfortunately my 5.5 was just the opposite. I had to mill, as I recall, 8 thou, to get it flat. About that same time(5 yrs ago?) there were reports of several “ out of the box” heads that weren’t flat.
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04-19-2021, 08:59 PM | #8 |
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Re: Milling Snyder 6.0 Head
Raising compression is only one piece of the puzzle..fuel,camshaft design, ignition upgrades..it takes a balance of all components to make good smooth efficient power..a modified flathead ford four cylinder engine geared correctly can compete in today's traffic..along with a tight chassis and 16" rubber ...even mechanical brakes do the trick if you set them up right..that was the goal of my build,to drive solo in CA boulevard and freeway traffic without being a menace..
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04-19-2021, 09:31 PM | #9 |
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Re: Milling Snyder 6.0 Head
My experience in milling a head for more compression is on a stock "low" head for a Model T. about 5/8 inch was removed. It worked great. I don't know what the resulting compression ratio was. So, has anyone milled a stock A head to gain compression ratio? I suspect the area above the piston would have to be relieved to clear the piston.
BTW, the milling on the T head went into the water jacket but it was blocked by the head gasket. Just as important as the higher compression ratio is the combustion chamber design. Does the design promote turbulence? Does it relieve the valve area for better flow?
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04-20-2021, 03:52 AM | #10 |
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Re: Milling Snyder 6.0 Head
I took my new 6:1 head (2019) to the local auto machine shop to check flatness and he said that it was surprisingly flat.
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04-20-2021, 01:23 PM | #11 | |
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Re: Milling Snyder 6.0 Head
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