Ok I know the DET has a side feed type injector, but also owning and doing a lot of work on toyota supras I know they also have the same style side feed injectors. The stock mkiv supra injectors happen to be a low impedence 550cc injector which if it would work in a sr20 would be a great upgrade for cheap.

Does anyone know if the det uses a high or low impedence injector? Has anyone ever tried somthing along these lines before?

thanks
James

I'm not 100% positive about what "high" and "low" are, but I know that when you're trying to use MSD 72lb/hr or the 444cc/m injectors from a GTi-R on an SR20DE[T], you have to use a ballast resistor to get them to work. I believe that this is an issue with the ECU and wiring harness, though, not the injectors or the manifold.

Hmmm.....I wounder if they would plug in without another fuel rail?

HIGH=10-16Ohm (usually)
LOW= 1.7-3 Ohm (usually)

Nissan uses mostly HIGH. U need the resistors for both 440 (they are low resistance) and the Supra 550s.

Chris

Originally posted by hpro123
HIGH=12-14Ohm (usually)
LOW= 2-3 Ohm (usually)

Nissan uses mostly HIGH. U need the resistors for both 440 (they are low resistance) and the Supra 550s.

Chris

So you think the supra injectors would work with the use of a resistor?

Thanks
James

Originally posted by ktrends

So you think the supra injectors would work with the use of a resistor?


Yes James, they should work.
They are both side-feed and they should fit your fuel rail.
For "similar" info you can check the following link:

http://www.mkiv.co.nz/articles/injectors.htm

It is Supra-to-Supra but they dealt with the same problems you will face.

Chris

By the way,

how are you going to compensate for the increased flow?
Do you have a JWT ECU reprogrammed or something?

Chris

Sounds great, thanks for the link!

one question though before I run off to the garage and attempt this swap. any idea on where I could go about picking up a EFI Resistor?

Originally posted by hpro123
By the way,

how are you going to compensate for the increased flow?
Do you have a JWT ECU reprogrammed or something?

Chris

Yes, I am running the JWT ecu now. I will have to send it back to them for a re-program for the 550cc injectors.

I just want to insure I can get these injectors to work before I send the ecu out.

If I get my hands on a supra TT EFI Resistor, could I use a setup like that on my car "just leave two of the input/outputs unused"?

I am asuming the EFI Resistor used in the article on that website is from the us spec supra?

SInce you are sending the ECU to JWT, you can confer with them (Clark) for the suitability of the Supra injectors AND ask him about a source for ballast resistors.

I suppose a searc in the se-r.net archives will also give you some info on the resistors.

As for the Supra resistor, yes, you can use it leaving the remainind 2 wires insulated.

Basically, the resistor is just that: a resistor inline with the injector so the "apparent" resistance of the injector is 12-16Ohms instead of the 2-3 Ohms. Some even use resistor-wires.

As for the source I do not know off-hand any.

Chris

Please let me know if this works. I'm all about ghetto cheap injectors on the stock rail.

I will let you guys know if i get this working. I can get 550supra injectors all day long for $150-$175 a set.

Talked to JWT today about using the mkiv injectors. They said if I send them my ecu and one of the injector they will get the computer to run the injector without problem. They have never used this setup before, and where intrested to see the injectors woudl fit in the sentra rail.

they said the cost would be $130 for the re-program.

I will keep you posted.

i don't know if my injectors are from a supra, but they did use a supra Mkiv resistor... does the mkiv resistor and 94 up se-r have the same ones???

Originally posted by ktrends
I will let you guys know if i get this working. I can get 550supra injectors all day long for $150-$175 a set.
Nice price. Is it for NEW or USED though? I assume they are used since 150 means 4*$35 which is a very good price for used but in mint condition injectors.

Chris

Originally posted by ktrends
Talked to JWT today about using the mkiv injectors. They said if I send them my ecu and one of the injector they will get the computer to run the injector without problem.

Cool. I assume they need to check the flow somehow and measure the actual resistance. What exactly did they mean by saying they will get the comuter to run the resistor without problem? Will they supple the required resistors?

They have never used this setup before, and where intrested to see the injectors woudl fit in the sentra rail.

Yes, this would be the main problem although I think that they are both side-feed and of matching sizes so it should fit.

they said the cost would be $130 for the re-program.

130 includes shipping? Usually I think they charge $100 so the extra 30 must be something on top of reprogramming. Maybe the resistors?
I will keep you posted.
Please do.

Chris

Originally posted by sentraturbo
i don't know if my injectors are from a supra, but they did use a supra Mkiv resistor... does the mkiv resistor and 94 up se-r have the same ones???

A resistor is a resistor. Does not make any difference. If original injector was a 13Ohm and substitute is a 3 Ohm then any resistor changing 13 to 3 will do.

Chris

The computer re-program is $100, they charge and extra $30 to do a "flow test" of on one of the injectors to figure out exactly how to configure the computer for it.

From the sounds of it, if they need a resistor it would be somthing they could install in the ecu so the injectors would be pretty much plug and play.

I am trying to get my hands on a spare fuel rail by this weekend to make sure the injectors will fit. If everything is a go I will send them a injector and my ecu by monday hopefully.

This would be really nice if it does work. Does anybody know if I can use these injectors with my ECU? My ECU is programmed for 50lb/hr MSD injectors with 3 bar fuel. If these injectors work on the stock fuel rail it would be MUCH cheaper for me... hence I get my Turbo setup faster :D