Re: [Amc-list] Head grooving & fuel

[Frank Swygert <farna@xxxxxxx>]

I was skeptical, and took a look at all the data that is there. No real controlled lab results, just various experiments by individuals. 

I think I see a trend though. Older engines, especially smaller ones, seem to benefit greatly from the improved turbulence in the combustion chamber. That's without other mods to improve the mixing of the fuel and air. 

The main reason manufacturers haven't jumped on it is that the latest engines (say the last 10-20 years) have improved combustion chambers and intake tracts that improve mixing. On those the grooves would do nothing. Grooving should help a 196, and maybe even the later sixes, but the smaller and higher intake ports of the 4.0L increase velocity and therefore turbulence in the combustion chamber, which should make the grooves unnecessary and practically useless. 

------------
Date: Tue, 28 Oct 2008 09:10:41 -0400
From: "Bruce Hevner" <scramblr@xxxxxxxxxxx>

I am still VERY skeptical of this procedure. There have been some ridiculous
claims made for it with virtually NO data to back it up. I will ask all the
custom cylinder head guys at the PRI show in Dec what they know about it and
post results here.

-- 
Frank Swygert
Publisher, "American Motors Cars" 
Magazine (AMC)
For all AMC enthusiasts
http://farna.home.att.net/AMC.html
(free download available!)

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