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Aftermarket EFI Systems - Tech - Mr. EFI

John Meaney And The Birth Of Aftermarket Engine Control
By Troy Smith
Photography by Troy Smith
Mr Efi
You may not know who John... 
   
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Mr Efi
You may not know who John Meaney is, but it's a safe bet you know the products he has been responsible for. Meaney is considered by many as the Godfather of modern aftermarket EFI systems. "Big," as his friends call him, would just assume to be known as another 'car guy' addicted to his hobby. Meaney's engine controllers are a popular choice for EFI-equipped racers such as Bo Butner, who runs a AA/SM Comp eliminator car.
Mr Efi
This gnarly looking science... 
   
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Mr Efi
This gnarly looking science fair project is Meaney's first 'digital' controller. It features the original Hitachi micro with an EPROM strapped to its back, prior to integration of the Motorola 68HC11 chip. The basic system relied on a limited number of microchips, as shown.
Mr Efi
The backside of Meaney's digital... 
   
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Mr Efi
The backside of Meaney's digital prototype shows tell-tale signs of being a hand-made prototype. The hand wire-wrapped, through-hole circuit board looks like chaos, yet proved to be the building block for further development.

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