Injector Driver vs resistor boxes

[Matticus]

I did a little reading today because I have always wondered why people didn't just pull a resistor box out of a car at a junk yard and use it. I mean why spend $120+ when you get something that "works" for next to nothing.

Here is the meat of what I learned:

Larger injectors simply flow more, so at idle they require an incredibly small pulse width. Running peak/hold injectors off a resistor box and a saturated driver is just slow and sloppy, which is why it's hard to get a good idle.

Peak/hold injectors want to open quickly at 4 mA and then sit at 1 mA to close quickly. Since a dummy box simply creates a static 1 mA current, you still get the fast close, but not the fast open.

Slow open + small pulse = idle woes

It also seems that people running maxed out big injectors would be able to get more fuel out of them by switching from a resistor box to an injector driver. Maybe I'm dumb but, this seems like a pretty good thing to people running big injectors. :thumbsup:

[mikesrex]

that quote tells me nothing about what is actually going on. I would be interesting in knowing more about what is actually going on, though.

[Matticus]

We talked on the phone but, keep looking and make sure to post back when you find something out. Like I told you, I don't care which one is better, I just want to find out WHY/HOW.

[Matticus]

that quote tells me nothing about what is actually going on. I would be interesting in knowing more about what is actually going on, though.

R you guys running one on the b52? Or for that matter, has Huy ever ran one out of necessity?

[mikesrex]

R you guys running one on the b52? Or for that matter, has Huy ever ran one out of necessity?

we are running resistor boxes in 4 cars on 1600's with no problems idling (or getting the car down the track for that matter)

So far the only thing I can find is some guy saying he tested the flow of a bunch fo bosch 1600's being driven with resistor box and at 14 V they had +/- 5% in difference. At 12 V it was +/- 9% difference between them. Then with an injector driver the difference between the injectors' flows was +/- 1.5%.

[Matticus]

Thank you for that bit of information.

I wonder what an acceptable variance is?

[mikesrex]

Thank you for that bit of information.

I wonder what an acceptable variance is?

A couple of people I know spent a good chunk of change of JJO and AEM injector drivers and actually had better luck with the stock honda resistor box. Both of these people use the stock Honda ECU to run their car, albeit with different ROM editors. So far my research indicates that the stock honda resistor box is better, even with 1600 cc injectors. I haven't found an actual reason to run an injector driver when using the stock Honda ECU.

[Missing4lugs]

i tdont get it rex?? i thought the Driver contains 10 independent injector drive channels. so using the stock ecu is better humm your pretty smart rex.:beavisbutthead:

[mikesrex]

i tdont get it rex?? i thought the Driver contains 10 independent injector drive channels. so using the stock ecu is better humm your pretty smart rex.:beavisbutthead:

the Honda ECU already has "injector drivers" as they are called that are pretty damned good. It seems like the engineers at Honda have done a lot better job at designing parts and systems than almost every aftermarket part manufacturer so far. Why would you think the stock ECU is shitty?

if you would like to actually discuss the topic at hand, please do so. This would involve a technical discussion of what the injector driver does and why it is better than running without one.

what you say so far means jack shit in terms of a technical discussion. this isn't a "copy and paste useless info from somewhere else" forum. I understand discussions may exist in different places, but simply copying and pasting useless info doesn't contribute to the current discussion.

[Missing4lugs]

what the heck rex i was just asking you dont get all mad. i was just asking i dont work on hondas that much just 240's dont blow a fuse:devil:

[mikesrex]

what the heck rex i was just asking you dont get all mad. i was just asking i dont work on hondas that much just 240's dont blow a fuse:devil:

honda, nissan, it's all the same shit. they are all cars that run on internal combustion engines. they all use wiring, they all use electricity, etc...