Who has these and what driver are you using? I saw this on another web site.

Are low and high impedence injectors the same size? Will the low impedence fit fine with the factory manifold and fuel rails? Will the injector connectors have to be changed out?

Also tuning the computer for the device can it be done by the current lightning tuners?

The following was taken from www.acceleronics.com:

" How do I tune my engine for low-impedance injectors?
Your engine computer "tune" does not care whether the injectors are low-impedance, or high-impedance. It only cares about how big they are, and how quickly they open. You will need to change the number that tells your computer how big the new injectors are. For example, when the Acceleronics Camaro changed from 50 lb/hr high-impedance injectors to 75 lb/hr low impedance injectors, we used LT1-Edit to change the "injector size" from 50 to 75. Nothing to it!
Your new injectors may also open more quickly than the larger-than-stock high-impedance injectors you removed. Again using the LT1-Edit example, we changed the values in the "injector-offset-versus-battery-voltage" table. Your computer may call it something else, but there is probably a similar "offset" number that tells the computer how snappy, or how sluggish, the injectors are. Once the injector size and injector offset numbers are fixed, continue tuning your air/fuel mixture as usual."

 

ask REM, they tried running low impedence injectors and the fuses just kept popping after 10 seconds or so. It did not work. I dont really know the details but I know that they are now running the 55# high impedence Siemens Dekas. The only way I know of running low impedence injectors is with a low impedence injector driver. Like in the Accel DFI setup.

 

I have the siemens deka 55's, but the only turbo Lightning I know of runs low impedence injectors. The driver I linked to above only costs $375...

 

This is waaaaaaaaaay over my head

Not sure what any of that meant, but schitt I'm impressed

Ok I'll grab,

Whats the advantage of using Low Imp, over our current Hi Imp ?

Does that mean you can go to a higher Injector without taking any more impedence away from the system as it does now.

And who exactly is this impedence guy, and why do I care,
and how the hell come we don't talk about this more

Please explain my Brothers

 

Easter,

Stock Ford EEC in your truck will not run low impedience injectors.

 

They did try using and impedance driver transformer to run the low impedence injectors that was junk, can't remember who made it but it was not worth the fuss.
As to fitting in the stock fuel rails........They will fit but if you feel you need beyond 55# injectors the factory rails shouldn't be under the hood any longer anyway. I think with 55's they are the next weekest link in the fuel system along with the stock lines.
Easter even if you go turbo there is no reason to switch to low impedence injectors. There are 55 & 57# injectors readily available that will work fine with the factory electronics.
Are you looking to go beyond ~800 RWHP? If so there are also 65 & 75# high impedence injectors available here . I beleive with the new Revolution and SCT software that is available even a wicked turbo set-up could be tuned to run very well with the factory electronics and greatly simplify your project.
The only reason I would go with low impedence injectors is if you go with an aftermarket engine management system. That's going to add at least another couple grand to your project. They can be awesome though, but between the money and finding someone who really knows there stuff with one it adds a whole other layer to the project.
Finally, as far as budget........I've had many a benchracing session (read 12-pack consumption) with some pretty wise gents. We all have come to the conclusion that weather a centrifigal, turbo or monster twin screw is used for boost, that it is probably only half the budget. The items to support the beast (ie. fuel system, tuning, suspension and safety items) will more than likely cost mo if you feel you need beyond 55# injectors the factory rails shouldn't be under the hood any longer anyway. I think with 55's they are the next weekest link in the fuel system along with the stock lines.
Easter even if you go turbo there is no reason to switch to low impedence injectors. There are 55 & 57# injectors readily available that will work fine with the factory electronics.
Are you looking to go beyond ~800 RWHP? If so there are also 65 & 75# high impedence injectors available here . I beleive with the new Revolution and SCT software that is available even a wicked turbo set-up could be tuned to run very well with the factory electronics and greatly simplify your project.
The only reason I would go with low impedence injectors is if you go with an aftermarket engine management system. That's going to add at least another couple grand to your project. They can be awesome though, but between the money and finding someone who really knows there stuff with one it adds a whole other layer to the project.
Finally, as far as budget........I've had many a benchracing session (read 12-pack consumption) with some pretty wise gents. We all have come to the conclusion that weather a centrifigal, turbo or monster twin screw is used for boost, that it is probably only half the budget. The items to support the beast (ie. fuel system, tuning, suspension and safety items) will more than likely cost more than teel you need beyond 55# injectors the factory rails shouldn't be under the hood any longer anyway. I think with 55's they are the next weekest link in the fuel system along with the stock lines.
Sorry for the long winded post..........Hope this helps out.

Eric

 

My post ended up double talking even after edit. Looks like Steve has a little glitch from the transfer.

Eric

 

Calightning, are you saying the the driver I linked to won't work with the ford pcm? I realize that you can't use low impedence injectors in a system designed for high impedence.

I have a decent fuel system. siemens deka 55's, fuel rails, -10 fuel line. I thought that the 55's were pretty much maxing out at around 600 hp though. Since I like to drive fast for more that 1/4 mile at a time running injectors more than what they are rated for might not be such a good thing. Also low impedence injectors are cheaper, and easier to find.

 

1st off i would not trust any high impedence injector over a 50 lber. are you sure those 65 and 75lbers. will even work with our comfiguration. i think they are completly different in shape and plug configuration. with everyone wanting to push more than 20 psi your right the stock rails and lines wont support it. let alone 55 lb. inj. i'll be stepping up to 96 lb. low imp. injectors in the next few weeks but i'm not doing what the average Lightning owner is doing either. i am running cprracing's highflow fuel rails, a fuel cell and hot shot 1000 fuel pump. yes any good tuner can tune around 55 lbers.

 

It's ok, just make believe I'm not here

I didn't ask whats the diff AND REASON for using Low Imp,
over High Imp ?????????

I like this impedence word, it would look good in my Sig,
So whats the deal with it, us dummy's wanna know too

 

i'm looking for a more technical way of putting it. low impedence ijectors are more accurate and reliable for one.

 

easterisland, try looking up the megasquirt

http://www.bgsoflex.com/megasquirt.html

i think its about 200 or so bucks for a full editable stand alone fuel management. i think they also have a nifty spark controller.

just a thought

 

I think that is an EFI computer which is different than the device I linked to in the first post. The device above uses the stock pcm and changes the current to the injectors so that low impedence injectors can be used.

 

Comment on the definition of the word "impedence" as used in electrical systems.

Impedence is overall resistance to current flow.
In a DC system, that should be mostly resistance.
When you lower the impedence, you get higher current flow, hence the blown fuses.
( In an AC circuit, coils and capaciters add to the resistance to change the impedence of the circuit (filters). By changing the use of these things, you can change the operating frequency of the circuit. )

 

yea, i just thought it might be a cool idea for those who need big injectors and want to do their own tuning