Can the fuel injector timing be changed ?? I.E. on a sequential fire system can
the fuel be fired sooner or later.
Thanx
-Justin
Can the fuel injector timing be changed ?? I.E. on a sequential fire system can
the fuel be fired sooner or later.
Thanx
-Justin
unless I'm mistaken, B3702 is precisely that.
1996 c1500 gen1e 5.7L - the "LS31", 24x CNP, LS2 coils, modified T56, 12200411PCM running COS3, zz4 cam, custom MPFI, etc. coming soon: Twin Turbos
Yes you can under the injector tab and it's based on coolant....at least with E38.. Dont have my laptop w me.
It's not as simple as keeping up with the intake vale opening... at high RPM the injectors will be open for longer than the intake valve is open, there is no way to spray the whole load while the valve is open, the spray will hit the closed valve.
There is also wall wetting/evaporation effects which the PCM models since the spray hits the port walls and not just the valve.
you have a great idea as i agree with your thinking... but being based on ect i dont see how this would be possible to be zero'd in on engine rpm... maybe someone will chime in to clear this up for us i have thought about this alot
2004 joe gibbs, rcsb, t-56 6 speed, 4.8l supercharged 10#, cam, bolt-ons, etc
1987 gnx
d-21 allis chalmers 3000 hp 504ci on alcohol
2004 dmax tow pig
The puddle has various characteristics... some of it will evaporate before the valve opens again, some of it will fall into the combustion chamber and evaporate there, and a few other modes;
also note that if for some reason the PCM can't figure out the crank/TDC phase on startup, it will fire the injectors in batch mode.
Talking E38.....
{B1205} Injector timing vs. ECT
{B1206} Injector timing vs. RPM
And I believe that the timing in in degrees from TDC on the firing stroke.
As joecar says, the required injector pulse width will be longer than the inlet valve is open for and altering the timing will mess with fuel dynamics.