Fuel Injection.

[timpa136]

Sept 27, 2016 16:36:50 GMT -5 ski said:

Direct injection on a rotary would be problematic at best.  DI also requires around 2000psi to fire the injectors and that requires a cam driven mechanical pump to produce. A whole other mess of engineering.

I see the dilemma (grin)

[Jess]

Ski,

Very informative. Also way above my pay grade.

Suffice it to say, if you produce a kit. Put me down for one.

Best,

[ski]

Thanks. In the event there is a 'kit', it will most likely contain just the two TB adapters, completed harness with connectors, a couple brackets, modified optical trigger wheel and pickup and possibly the TB. I'd include a sourcing list for the rest so people could pick it up as time and cash flow allow. The tuning file would be optional for those who just want to install and ride. One thing I forgot to mention about other EFI ECUs and tuning is the system would need to have the option of running open loop all the time. I'm not 100% on this part, but I believe we won't be able to use closed loop and an O2 sensor. Given the amount of oil injected in our bikes (more than is injected into the Mazdas) and the proximity of the sensor to the exhaust chamber, i think it will be trashed pretty quick. I do need to research this further and see what's available for wideband O2 sensors or using what Mazda used in there last gen RX and see how it does. We use O2 sensors on our diesels so I would think I could find something to use. I don't want to modify the exhaust manifold to take a sensor since we can't just run out and get another, but closed loop operation with O2 is the best way to run.

[pmcburney]

I'm in for one as well

[goandy]

Should be fine for O2 sensor- we run about the same oil ratio at the Mazdas. I'm afraid that you would have to modify an exhaust manifold- can't see any way around that with stock manifold and pipes as the sensor needs to be reasonably close to the engine...

[ski]

Yep, and that's my concern. You'd have to grind some fins, drill a hole that you may or may not be able to tap and then have to add an O2 bung.

[goandy]

A friend of mine did it to one of his exhaust manifolds to install an O2 sensor for tuning purposes.

Couldn't tell you exact details but it worked well. Probably wouldn't be that noticeable given the location of the manifold.

[pmcburney]

This looks interesting - www.ecotrons.com/products/400cc_to_800cc_engine_fuel_injection_kit/


These guys make a plug and play kit for a DR650 - this kit should be just as easily adapted to an RE5, I'd reckon.