Figuring if a head has been plained.

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Model T Ford Forum: Forum 2014: Figuring if a head has been plained.
Top of pagePrevious messageNext messageBottom of page Link to this message  By Tyrone Thomas - Topeka KS on Sunday, September 14, 2014 - 10:53 pm:

If a head has been plained would there be swirl marks or is there a spec measurement from ford that gives the height of a head.
Can a person say measure the height of an outer edge bolt hole from bolt head seat to the machined surface of the head and get a height?

To create a noticable increase in compression, how many thousands would have to be shaved from the head?


Top of pagePrevious messageNext messageBottom of page Link to this message  By Duane Markuson on Sunday, September 14, 2014 - 11:10 pm:

I think the guys that do the Montana 500, cc the combustion camber in order too determine how much the head has been shaved


Top of pagePrevious messageNext messageBottom of page Link to this message  By Eric Hylen- Central Minnesota on Sunday, September 14, 2014 - 11:29 pm:

The depth of the bolt holes varies too much to serve as a guide. He most reliable method is to check if there's still an inspection letter stamped right in the middle of the head on the under side between #3 and #4 cylinders.

I think I've set a personal record for posting today. I guess being laid up while recovering from pneumonia has a small upside.


Top of pagePrevious messageNext messageBottom of page Link to this message  By Roger Karlsson, southern Sweden on Monday, September 15, 2014 - 03:15 am:

Here's a recent thread covering the high heads: http://www.mtfca.com/discus/messages/411944/462161.html?1405953353

I measured four unmilled heads, All of them measured between 2.680" and 2.700", most of them around 2.680".

Ken Todd and Mark Chaffin posted the dimension from Ford's factory drawing: 2 11/16" or 2.6875".


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