standard ecu, biggger injectoirs

[crshbndct]

aw11 4agze

i was wondering if i can slightly increase the size of the injectors in my 4agze seeing as how i am told the computer is quite good and will adapt to smallish changes of this sort.

so, were i to put say 20% bigger injectors in, would i be able to just reset the computer, go for a a good thrash, and the ecu would adapt to them, or are bigger injectors definitely aftermarket ecu time?

my plan is a td04, and about 10 - 12 psi boost on a standard motor, but i have heard they go lean on about 10psi with this size turbo and stock squirty machines

thanks for the help everyone

here are some boobs for your efforts

(.)(.)

[Dell'Orto]

if they're the same impedance as stock ones, the ECU will run them, but no it wont "see" them and adapt as such...it'll just keep pumping in fuel as normal, which in turn will make it run rich. Not always a bad thing.

[vvega]

why do you want bigger injectors ??
talk to ezy10's or someone that has doen this before

most of what your hear is just bulshit
its been done many times wiht no issues

v

[crshbndct]

but woiuldnt the ecu see them in that it cant tell that they have changed, but that the engine is running rich and so will bring back the fuel a bit?

which makes me wonder something else... do aw11 4agze ecu's use an o2 sensor?

[crshbndct]

why do you want bigger injectors ??

cheap turbo conversion

and before y'all say no such thing, i figured with a 4qagze i should be able to get away with it for close to stuffall

i already got a turbo manifold, t04, and n/a non tvis inlet manifold. gonna use the stock cooler until i can sort a better arrangement. and lots of heatwrap and lagging

[Dell'Orto]

but woiuldnt the ecu see them in that it cant tell that they have changed, but that the engine is running rich and so will bring back the fuel a bit?

which makes me wonder something else... do aw11 4agze ecu's use an o2 sensor?

No, the ECU's arent that adaptable...it might lean it to an extent, but not enough to make a difference.
If its for a turbo'd 4AGZE then I'd just wind boost into it til its got a nice A/F ratio

[RedMist]

Cars dont run closed loop continiously. IE adjust fuel based on o2 readings. Cold start and for a few minutes afterwards, idle, accl pending fuel (ie you press the accl down) in each of those situations you could, or will, be washing the bore. Closed loop is also bound by limits to ensure a faulty O2 sensor doesnt send the map well out.

You have to realize that with a perfect injector selection you will still have situations where it will run lean, or rich. This may work for a while, but its certainly not a good way to treat an engine.

[Crampy]

Just turbo it as is.
It will make a poo load more power than with the SC12.
My S/C AW11 was running a bigger pulley, boosting up to 14-15psi with stock intercooler (Yeah probably should have upgraded that.)
So, if it can handle 14psi on a supercharger, then why not a turbo?

So, turbo it and go for it. Check the Air/Fuel mix and for knocking as you increase boost.

[matt dunn]

So, if it can handle 14psi on a supercharger, then why not a turbo?
.

Because 14psi with a turbo is about 30 to 40% more hp than 14psi with a S/C.

[Crampy]

Hehehe, oops I meant to say I had 14psi with a S/C, so why not just put a turbo on it and go from there .

I didn't mean just slap a turbo on and boost it up to 14 psi.

Just start with stock actuator pressure and go from there. Making sure to check thoroughly when increasing boost.