Posted by ss55 on August 18, 2018 at 12:41:03 from (63.147.218.40):
In Reply to: More generic EFI talk posted by David G on August 17, 2018 at 16:53:43:
Interesting project. What do you think the potential market demand could be? EFI retrofit kits for older cars and pickups never really took off in any volume. Even at a low price of $500 I can't imagine very many pre-1960 tractors being converted to EFI, and US gasoline farm tractors died out by the early 1970's.
I think you are on the right track looking at 1960's gas tractor engines that are still in regular use today and were sold in higher volumes: Deere 20 series Dubuque engine tractors, IH 74 series utility tractors, IH 460 to 756 six cylinder gas tractors, Deere 4020 gas, Oliver Waukesha gas tractors 1600- 1855 maybe 77 - 880 too, Case big 400 to 830 four cylinder gas tractors, maybe Ford utility tractors and Massey-Ferguson utility tractors. The largest "gas hogs" would benefit the most. Were gas tractors popular in any foreign markets, or were they all mostly diesel long before the USA?
Swapping in a complete throttle body injection body for the carburetors could minimize modifications to the intake manifold and keep total costs down. Common diameters of existing bolt on exhaust extensions could be inexpensive mounts for O2 sensors (temporary or permanent), eliminating the need to drill and tap corroded and fragile exhaust manifolds to add a sensor. I'm not sure I would rely on many 50 year old tractor distributors to still be within factory specifications. Would you rebuild them, replace them or switch to coil bank computer controlled ignition? Could popular (inexpensive) GM HEI and Chrysler electronic ignition distributors be re-curved and used on tractors to keep costs down.
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