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Originally Posted by BruceMcC
My mpg improved by 4 mpg from installing an an offset key on the valve timing gear and adjusting the IP timing to compensate for chain stretch. IP timing is a bit messy but not too bad. The offset key is an easy job.
I also pop-pressure-matched my injectors at the same time, which makes for a nice idle but I don't believe would improve fuel economy.
Bruce McCreary
'85 300D
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If you can equalize the fuel delivery in the cylinders, you will improve engine efficiency at all rpms. It's a slight improvement, but it sounds good in theory.