Anybody using an injector driver? FJO or AEM

[benjimatt]

Hi guys I bought some Bosch 1600cc injectors and the stock resistor pack does not like the injectors. So I decided that I need an injector driver. I have read that the aem injector driver does not like the bosch 1600s.

Therefore I was thinking of getting an FJO injector driver. I was wondering has anyone on the forum used this injector driver???

 

[SlowSpyder]

Are the bosch's saturated or peak/hold

 

[benjimatt]

they are 1600cc peak and hold.

 

[steve]

I'm not aware of any problems running them off the stock turbo injector drivers and resistor.
Are you running an AEM now your profile says DSMAP?

 

[benjimatt]

no im running ds-map. But idle and cruise suck with these injectors because they are 5 ohm injectors and I guess our stock resistor pack does not like that .

 

[steve]

no im running ds-map. But idle and cruise suck with these injectors because they are 5 ohm injectors and I guess our stock resistor pack does not like that .

The issue is that they have to be really well matched to idle since the pulses are so short.
Deadtime is a huge factor too.

5 ohms for the injectors is fine. The stock injectors are 2-3 ohms and the resistors 6 ohms. The NA injectors are 13-16 ohms so a 5 ohm injector with a 6 ohm resistor is less of a load on the driver than the original 450's.

 

[benjimatt]

Then why do i have such a hard time getting them to idle good?

 

[steve]

Then why do i have such a hard time getting them to idle good?

The issue is that they have to be really well matched to idle since the pulses are so short. Deadtime is a huge factor too.

I don't know what else to say. As the injectors get larger you need a tighter match to get the same idle quality.

 

[RipperXX]

Can RRE flow match Bosch injectors?

 

[steve]

Can RRE flow match Bosch injectors?

What did RRE say?

 

[airmail96]

I always thought 1600cc injectors required a higher idle in order to idle properly.

 

[Ceddy]

A lot of people have problems with the Bosch 1600s.

Raising your idle speed, will help some.

Lowering your fuel pressure will make them act like a smaller injector.
You are going to run out of pump a long time before injector, with 1600s, unless you have a really heavy duty fuel delivery setup.

 

[steve]

I always thought 1600cc injectors required a higher idle in order to idle properly.

That's one bandaid. Raising the idle causes a tiny improvement in injector pulse width and the flywheel spinning faster helps smooth out roughness.


The reason I responded to the thread was to make it clear the problem here wasn't with the injector drivers on the DSM ECU or the resistor pack but a problem with these injectors and the difficulty getting them matched well enough at such short pulse widths to idle well.

 

[Aaron91RS]

Screw the bosch 1600's.
Sure they used to be the only choice but I just run FIC bluemax injectors on AEM.

 

[1gDSM4g63]

Anyone have any updates on the AEM Peak & Driver injector driver box? I know that they can't handle 5 ohms 1600cc injectors, but the AEM tech agent told me differently today. I do don't know if AEM upgrade their box or not.

 

[benjimatt]

Anyone have any updates on the AEM Peak & Driver injector driver box? I know that they can't handle 5 ohms 1600cc injectors, but the AEM tech agent told me differently today. I do don't know if AEM upgrade their box or not.

There is a guy in my city that uses 1600's with an aem injector driver and he says it works well.

 

[1gDSM4g63]

There is a guy in my city that uses 1600's with an aem injector driver and he says it works well.

Can it control the idle well?