Injectors
07-22-2008, 05:45 PM
#1
Jane Bond 007
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Injectors
I found these on line - the price is pretty good. I know our cars need 5.5 ohms; these are 2.3. Do I need resistors or will they work right out of the box? TIA
http://www.racetronix.com/3102FM.html
http://www.racetronix.com/3102FM.html
07-22-2008, 05:52 PM
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I found these on line - the price is pretty good. I know our cars need 5.5 ohms; these are 2.3. Do I need resistors or will they work right out of the box? TIA
http://www.racetronix.com/3102FM.html
http://www.racetronix.com/3102FM.html
07-22-2008, 08:21 PM
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Jane Bond 007
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Dave:
Do you know the specs on the injectors I had you pick up for me? I'm assuming they are high impedence and I can just unload them on ebay. I'm going to send them to Alicia's brother who has a friend the can test them for me, but I thought you might be able to call the PO and find out for me.
Do you know the specs on the injectors I had you pick up for me? I'm assuming they are high impedence and I can just unload them on ebay. I'm going to send them to Alicia's brother who has a friend the can test them for me, but I thought you might be able to call the PO and find out for me.
07-22-2008, 08:40 PM
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If you enjoy a working DME then you need resistors.
Typically you would use two 1 ohm resistors with 2.5 ohm injectors. Since these are 2.3 ohm injectors, I would suggest using two 1.5 ohm resistors according to what I've shown below...unless I figured something in wrong...
The ECU driver is rated at 16 amps.
Without resistors:
2.3 ohm/4 = 0.575 ohm combined.
12v/0.575 = 20.9 amps.
With two 1 ohm resistors and 2.5 ohm injectors:
2.5 ohm + .5 ohm resistance(a 1 ohm resistor on each of the two injector drivers) = 3 ohms each
4 injectors would be 3 ohms/4 = 0.75 ohms
12v/0.75 = 16 amps.
With two 1 ohm resistors and 2.3 ohm injectors:
2.3 ohm + .5 ohm resistance(a 1 ohm resistor on each of the two injector drivers) = 2.8 ohms each
4 injectors would be 2.8 ohms/4 = 0.70 ohms
12v/0.70 = 17.1 amps.
With two 1.5 ohm resistors and 2.3 ohm injectors:
2.3 ohm + .75 ohm resistance(a 1.5 ohm resistor on each of the two injector drivers) = 3.05 ohms each
4 injectors would be 3.05 ohms/4 = 0.7625 ohms
12v/0.70 = 15.7 amps.
Typically you would use two 1 ohm resistors with 2.5 ohm injectors. Since these are 2.3 ohm injectors, I would suggest using two 1.5 ohm resistors according to what I've shown below...unless I figured something in wrong...
The ECU driver is rated at 16 amps.
Without resistors:
2.3 ohm/4 = 0.575 ohm combined.
12v/0.575 = 20.9 amps.
With two 1 ohm resistors and 2.5 ohm injectors:
2.5 ohm + .5 ohm resistance(a 1 ohm resistor on each of the two injector drivers) = 3 ohms each
4 injectors would be 3 ohms/4 = 0.75 ohms
12v/0.75 = 16 amps.
With two 1 ohm resistors and 2.3 ohm injectors:
2.3 ohm + .5 ohm resistance(a 1 ohm resistor on each of the two injector drivers) = 2.8 ohms each
4 injectors would be 2.8 ohms/4 = 0.70 ohms
12v/0.70 = 17.1 amps.
With two 1.5 ohm resistors and 2.3 ohm injectors:
2.3 ohm + .75 ohm resistance(a 1.5 ohm resistor on each of the two injector drivers) = 3.05 ohms each
4 injectors would be 3.05 ohms/4 = 0.7625 ohms
12v/0.70 = 15.7 amps.
Last edited by eniac; 07-22-2008 at 08:42 PM. Reason: Yay for laziness, copy/pasting your own text 3x makes for 3x the errors :)
