Hello all,

I have recently fitted the Emerald K6 ecu to my 3dr Sierra Cosworth. Overall i am very happy.

I have fitted a cam sensor to the cambox using the standard sierra crank sensor.

I have not yet enabled the sequential option within the ecu nor have i connected the sensor.

Does anyone have any experience of this matter?

Thanks in advance

Matt

 

As far as im aware, and please feel free to correct me if im wrong any one, Sequential fuel injection only works at a low engine rev range, up to about 2500 rpm, and is to help with a good clean burn and atomisation of the fuel, by injecting only when the valve is open, above that rpm it has no real benifit and is not required for high power applications where your injector is open most of the time anyway!

 

Yes enable it!!! As standard the Cosworth's were sequential injection anyway, you currently have batch injection!

The benefit is if you make a sudden change the fueling can be changed accordingly opposed to waiting until the next revolution of the engine and also delivers better economy as each injector runs in the firing order hence "Sequential".

Martin

 

Sequential will give you better MPG even on a competition engine, that is FULLY sequential not semi, in fully s mode the injector fires as the inlet opens, it does this at ALL engine speeds, as the cossie uses injectors that are far enough away from the inlet valve there is plenty enough time for fuel presentation/mixing, at higher rpm there becomes a much smaller time for fuel presentation(mixing with air) as everything is that much faster, in an ideal world you would have one close injector and one far away injector for each cylinder, and have them change over from close to far at high rpm and load.
Even running back to back tests(at emerald) on batch fired and fully sequential there is so little in it, but hydrocarbons are a lot higher with batch fired.
tabetha

 

If your injectors are say 85 percent duty cycle for example, then they are pretty much open all the time on boost, but as tabetha says may make a slight difference to the burn at lighter throttle positions, i doubt you would feel any in car difference though.

 

Afternoon all,

thanks for your time so far, i am interested as to whether people have noticed any difference with their cars after enabling this?

Cheers

Matt

 

YES YES YES, I also don't use the closed loop on my Emerald K3, but can still get 40+ MPG without trying hard, but average 28-32 on short run stuff, my emissions at last MOT were as follows, on GREYS T3/34, ported head 0.97% CO, 137PPM, with 200,000 MILES on the ORIGINAL engine(head had been done) bores pistons rings all 200,000 miles old.
This was set up by Dave W(emerald), was not tweaked at all for mot, doesn't need to be, runs 100% perfect, for a road car just go fully sequential, the 4wd cossie that I'm taking to Emerald in the morning for mapping on it's K3 is also going fully sequential.
It's not really an enable thing you have it mapped as that, or not by whoever is doing it, you can have 1 map on fully sequential, 1 on semi, 1 on batched if you like.
I did employ closed loop, to see but it ran better on non closed loop and did just as well on mpg.
If you buy Haynes book number H835 "ENGINE MANAGEMENT" this is written by Dave W, 1 half of emerald, the other half being Karl Luxton.
I've had this conversation with dave before and I use fully sequential.
tabetha

 

Thanks for all in info-fullysequential it will be...just going to get my soldering iron!!!!

cheers
matt