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fuel injection
Written by douglasvanb on 11/23/2010 at 10:31 pm

It's started... I've begun my research on adding fuel injection to a PC. From
what I've seen so far, it is possible. It will take determination, money, and
me being crazy enough to subject my poor PC's engine to some experimentation.

As the new Honda Shadow VT750S has fuel injection on-board, swapping that system
onto a PC seems promising. The VT750 shares heritage with our PC800 engines. I
was looking at the parts microfiche for our bikes and a VT750S. Everything on
the engine up to where the carbs would bolt on looks the same (ignoring ours
being tuned more "sportily").

Does anyone have a new VT750S who would be willing to look at the bike and take
some measurements for me? Specifically, the carb insulator boots (or I guess
these would be fuel injector insulator boots?) interest me. They have different
part numbers (PC800: 16211-MR5-670 vs VT750S: 16211-MFE-640). However, looking
at the microfiche they sure do look similar. The big question is if the tubes
that lead into the cylinders are the same size between the bikes. (Basically
where #7 is pointing http://www.directcon.net/lcshepp/PC800SMPage5-4.html )

If they were the same, then it becomes much more reasonable to pursue using the
VT750S fuel injection system. PowerCommander already makes a unit that will
interface with the VT750S Honda ECU which will allow tuning for the higher RPMs
that our bikes use.

Otherwise, there are several companies that make custom fuel injection systems
or I could do it myself and learn the black arts of fuel management. Obviously,
I'd prefer sticking with Mother Honda, even if the parts weren't exactly made
for our bikes.

All food for thought anyway...

Cheers!

Douglas