I was looking through the PDF for wiring the FT450 to a k series and the injector wiring has me baffled.



Injector 1&4 are wired on a single signal. (2&3 identically off a single signal)



Wouldn't that result in the injector opening on the intake stroke (as a normal system) and during the combustion stroke (while the intake valve is closed)?

That couldn't be good for atomization or fuel ratios.

Wouldn't the fuel pool on the backside of the intake valve waiting for the valve to open, also while the fuel is waiting wouldn't it also potentially get sucked into one of the other valves that is open during it's intake cycle?

 

Yeah that is called a wasted spark system... GM uses it all the time. Will it work, sure! However, there is absolutely no reason to be going back to 1980 and using a batch fired fuel and ignition system on a Honda that has been using sequential fuel and ignition since the 80's, Why are you using this system, is it a one off custom build? There are a lot of K20 tuning options out there that maintain the MPFI system.

 

I noticed the wasted spark portion of it, the injector batch firing was a surprise.
I was planning on using the fuel tech system since is an all in one ECU and cluster.
The cluster on the MR2 Spyder leaves a lot to be desired.
Also, the KPro I have now will have it's limitations once I start needed traction control and wheelie (height) sensors.