ABC's of Fuel Injection

Neat reading from a historical perspective. Educational, and maybe even thought provoking.
http://chevy.oldcarmanualproject.com...tion/index.htm

That was very cool! I started to recognize it after a few pages! We actually had one in Auto Shop in high school... It was antique then... in 70's...

that made a whole lot of references to GM using a continuous injection system..... which i've never seen on a GM product? were the first cadillac FI engines of the early 70s like that?

Think late 50's early 60's mechanical Injection.

oh damn, that is old... the mechanical rochester injection setups used on the corvettes?

Yes, the Corvette systems. They were also available in the full size cars if you were willing to ante up. There were some special race applications that were equipped with it as well. And it also applied to a rare Pontiac FI system.

http://www.mecum.com/auctions/lot_de...D=FL0110-89882

Some of what I find interesting is that the functions necessary in mechanical FI were retained in many EFI systems. It can be surprising to realize how much was known 50 years ago... and to think about where we might be today if this system had caught on.

All the mechanicals of the system was the holdback, they were maintenance intensive, way more mechanical parts then a carb. When electronics took over the mechanical functions it was way more reliable.

Notice on types of injection? Direct! They knew it then but it has taken 50 years to get it to OEM level.

Heated intake, Ram air, intake runners, fuel injected on hot parts, vacuum difference in ports... all sounds familiar! Look at the fuel metering system and see how electronics has taken over all they did back then!