Quote:
Originally Posted by trevarthan
This is the first time I've heard anyone say this. Do you have any data to back up this claim? I'd like to know more.
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I learned if from hanging out with Pat Usher who owned Sunset Engine Development. Smartest engine guy I've ever met. Here is a link to his web site. Read the Nerdletter #3. While he doesn't call out my statement in the article specifically, we have discussed fuel formulas more than once over the years. The article may lend some credence to my statement or you may just feel I'm full of it. It's all good.
https://www.cherylyoungonline.com/Pa...her/index.html
I should have mentioned in my original post that you can only only get the most basic idea of lean and rich from "reading" a spark plug. The difference between a 11:1 AFR and 16:1 AFR might be visible, but being able to discern between 13:1 and 14:1 would not be possible for most people. And since the arrival of the O2 sensor no one is bothering to learn what to look for so it truly is a lost art.
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Thanks to Bob and Jeanie and everyone else at Superior Performance for all their great help.
RIP Bob Parks.
1967 Burban (the WMB),1988 S10 Blazer (the Stink10 II),1969 GTO (the Goat), 1970 Javelin, 1952 F2 Ford OHC six 4X4, 29 Model A, 72 Firebird (the DBP Bird). 85 Alfa Romeo
If it breaks I didn't want it in the first place
The WMB repair thread
http://67-72chevytrucks.com/vboard/s...d.php?t=698377