Brumfield Head

[BRENT in 10-uh-C]

OK,Brent, what's the backstory?

Bill Stipe has tested this super-Brumfield head type head, and even took one and "blueprinted" it by CNC machining the chambers to make them match, and machined the counterbores out. This even required him to drill through the top if the head and add a brace because the deck of the head was moving because it was too thin. After Bill had "flogged" this head, it cc-ed in at 7¼ compression and on this test-mule engine with a B carburetor it made about 66 horsepower. That same engine with a stock out-of-the-box Snyder 6.0 head made 4 Hp less. The difference between the two was the amount of compression. Where the benefit comes from is the 6.0 has a much thicker deck which makes it an easy candidate to machine out the counterbore which based on Bill's testing, really increases the power output. Therefore while I know that the A-6010-HC6 is currently being retooled, in a few months it will be back into production where it can be ordered and received within a week. If you consider that retail price on that 6.0 head is $325 and then add in $50 for machining the deck locally, and you have a head that will make the same amount of power for all intents & purposes as what a Super B-F, ...but for $200 - $250 less money.

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[5window]

Bill Stipe has tested this super-Brumfield head type head, and even took one and "blueprinted" it by CNC machining the chambers to make them match, and machined the counterbores out. This even required him to drill through the top if the head and add a brace because the deck of the head was moving because it was too thin. After Bill had "flogged" this head, it cc-ed in at 7¼ compression and on this test-mule engine with a B carburetor it made about 66 horsepower. That same engine with a stock out-of-the-box Snyder 6.0 head made 4 Hp less. The difference between the two was the amount of compression. Where the benefit comes from is the 6.0 has a much thicker deck which makes it an easy candidate to machine out the counterbore which based on Bill's testing, really increases the power output. Therefore while I know that the A-6010-HC6 is currently being retooled, in a few months it will be back into production where it can be ordered and received within a week. If you consider that retail price on that 6.0 head is $325 and then add in $50 for machining the deck locally, and you have a head that will make the same amount of power for all intents & purposes as what a Super B-F, ...but for $200 - $250 less money.

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Very interesting-thanks.

 

[Mike V. Florida]

The original 7.1 head went for just under $300.00. I wonder how much it could go up and people still buy enough to be profitable since a used one when for over $600?

 

[columbiA]

If you machine out the counterbore,you would be reducing the comp ratio because you are removing metal & making the chamber larger.

 

[hardtimes]

If you machine out the counterbore,you would be reducing the comp ratio because you are removing metal & making the chamber larger.

Hmm, who knows what he meant by useage of those words. But, common sense .....when a head is milled (removal of surface metal)....if enough metal is milled away from the face you are going to eventually mill out the area known as the counterbore (flycut?). This would increase compression and (possibly) have piston hitting head..no.