MalibuJack

iTrader: (5)

You can actually change that yourself.. Change the scaling in the defintions to uint16 or uint8

racegate

iTrader: (1)

Ah yes..I see the option to change the displayed value and the equation....once again proving how flexible and great this software is.

MalibuJack

iTrader: (5)

I actually did something similar on mine for some of the tables..

AMS

iTrader: (3)

From my experience going from a stock injector to the larger injectors we use you can adjust inj. scaling but it's not a straight shot across the board. You really don't have to take out that much fuel on the lower load levels to keep fuel trims near zero. Take out too much and the car runs like crap. For example, going from the stock injector to a 680cc/min inj (ours) there is very little you need to do a low load levels & rpm levels (low pulsewidth conditions), but you do need to remove quite a bit of fuel at higher PW's.

Ford EEC tuning Ted? EECTuner all the way!!

l2r99gst

iTrader: (2)

Do you think this partially has to do with the dual circuit for the fuel pump? When switched over to the higher voltage circuit, depending on the fuel pump and fuel modifications (fpr, lines, etc), the fpr may be overrun a bit more at the switchover point causing the fuel pressure to rise, which basically makes your injectors seem larger than normal.

If this was the case though, I would imagine the effect to diminish as RPMS increase, since the injectors would be cosuming much more fuel.

Eric

mchuang

iTrader: (11)

Yea that would be nice but beggars cant be choosers lol, Its freeware the guy has already still did an awesome job. I can think of plenty requests to add also like speed density, cell block follow, on the fly tuning hahaha, but we cant complain its free.

l2r99gst

iTrader: (2)

After thinking about it more, it is probably simply due to the fact of the increased deadtime (latency) of the bigger injectors.

It will have less of an effect at idle because of the relatively low pulsewidth compared to say, cruise, where the pulsewidth would be roughly double, say 1ms-2ms. I have seen numbers like this with DSMLink.

That latency or deadtime of the injector may be matched nearly perfectly for the 1ms of so of pulsewidth at idle, but when you get to much larger pulsewidths, that latency is getting to be a much smaller percentage of the total pulsewidth time, so now, more fuel must be removed.

For example, say that your injectors are 10% larger than stock, but the deadtime is .1ms (100uS) more than stock. At a 1ms injector pulsewidth that would cancel out and your idle would be mostly unaffected (you're getting 10% more fuel, but at 10% less time (.9ms)). But now at a larger pulsewidth like say 5ms, you're getting 10% more fuel due to the 10% larger injectors, all but this is in 4.9 ms in actual time due to the .1ms deadtime increase. So, you;re really only losing 2% of time. This percentage would go down as the injector pulsewidth goes up.

So, this would go in line exactly with what you have experienced.



Eric

mchuang

iTrader: (11)

But when you change the scalings to units the numbers are all wierd in some spots. Does it actually calculate accurately. Like for example if I change the injector scaling to raw fuel is it calculated already or do i need to edit the scaling? I changed the scaling on the high fuel map and it only goes to 120 load, but the low map goes to 260 still. All I did was change to units no other edits

MalibuJack

iTrader: (5)

You have to verify that your using the same scaling units on both maps... I've noticed one or two duplicate scalings that were named slightly differently.

mchuang

iTrader: (11)

I did use it on both maps.

MalibuJack

iTrader: (5)

Oddly enough, the byte order looks reversed..

mchuang

iTrader: (11)

Ok I figured it out. When you make that change you must exit the software and reenter and everything looks normal

mchuang

iTrader: (11)

Just one more question, do you also have to change the scaling on the evo7base also? Or can you just leave it alone

MalibuJack

iTrader: (5)

If you do it on the base, it should carry over to the ECU specific ones, at least if you create new definitions..

b0ostedEV08

Remember... the injectors are scaled in this fashion to 513cc, because you have other calculations before the final pulsewidth. Such as MAF, Engine temp, Air temp, Barometric Pressure, Fuel Pressure, Low speed fuel pump operation at low engine loads and last and final and most "Battery Voltage Compensation" Now with all these compensations and going thru every subroutine and doing the calculations... it comes out very close to 560cc.