How will I install Denso 720cc secondaries?
07-19-04, 11:32 AM
#1
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How will I install Denso 720cc secondaries on S5 Turbo II?
I bought new injectors cause my old ones were bad.
2x 550cc RC Eng for primaries and 2x 720cc Denso secondaries from RX-7.com.
With the 720's I also got 2 connectors and 2 resistors.
What is the installing procedure?
-Fanis
2x 550cc RC Eng for primaries and 2x 720cc Denso secondaries from RX-7.com.
With the 720's I also got 2 connectors and 2 resistors.
What is the installing procedure?
-Fanis
Last edited by FxF; 07-20-04 at 05:08 AM.
07-19-04, 02:21 PM
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Engine, Not Motor
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Remove upper intake, remove old secondaries, install new secondaries.
You got the resistors because these are high impedance injectors. If you were installing into an '86-'87.5, you would need the resistors. Since you car is already set up for high impedance, you don't need the resistors.
Also, you're going to need something to tune those injectors (like an S-AFC).
You got the resistors because these are high impedance injectors. If you were installing into an '86-'87.5, you would need the resistors. Since you car is already set up for high impedance, you don't need the resistors.
Also, you're going to need something to tune those injectors (like an S-AFC).
07-19-04, 04:23 PM
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You got it backwards, Aaron. The 720's are most likely LOW impedance injectors, and will need the resistor on the car in question.
550's are about as big as they commonly make high impedance injectors.
Dale
550's are about as big as they commonly make high impedance injectors.
Dale
07-19-04, 10:12 PM
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***IF using LI injectors on a HI harness, you must splice into the harness, at each injector lead (for a total of 4) 10 ohm/10watt resistors available at radio shack for a couple of bucks. Doesn't matter which wire of the 2 per injector you splice to, polarity isn't an issue here. This bumps the LI resistance up to acceptable load for the ECU to see.
07-20-04, 02:51 AM
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Originally Posted by dcfc3s
You got it backwards, Aaron. The 720's are most likely LOW impedance injectors, and will need the resistor on the car in question.
550's are about as big as they commonly make high impedance injectors.
Dale
550's are about as big as they commonly make high impedance injectors.
Dale
Thanks to MrFuzzy I found my answer here.
http://www.rotaryresurrection.com/ro.../injector.html
-Fanis
Last edited by FxF; 07-20-04 at 05:04 AM.
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07-20-04, 08:44 AM
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Originally Posted by dcfc3s
You got it backwards, Aaron. The 720's are most likely LOW impedance injectors, and will need the resistor on the car in question.
550's are about as big as they commonly make high impedance injectors.
Dale
550's are about as big as they commonly make high impedance injectors.
Dale
Well, if it counts for anything, I had it right in my head...Translation between brain and hands not working...
where is the best or easiest place to splice in the resistors?..JET
07-20-04, 12:11 PM
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Originally Posted by Aaron Cake
Oops... Well, if it counts for anything, I had it right in my head...Translation between brain and hands not working...
Put them in the plugs just before the injectors. There is a wire (I think black w/yellow) that is constant 12V. That's the best place.
Well, if it counts for anything, I had it right in my head...Translation between brain and hands not working... Put them in the plugs just before the injectors. There is a wire (I think black w/yellow) that is constant 12V. That's the best place.
Originally Posted by Jahoo88
I just put gsl-se (orange top) into my stock turbo s5 t2. it doesnt seem to smoke black much over 3500 with these injectors untuned. I used 10 ohm resistors on the green wire.
I guess i should get an s-afc and boost controller now and tune it on a dyno.
I guess i should get an s-afc and boost controller now and tune it on a dyno.
(Thank God we are not disarming a bomb!!!)
-Fanis
07-22-04, 06:03 PM
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i thought all s4 's were low impedence ...
when i had to replace one of my injectors oh my 88TII i got it from victoria british, and they sent me a Low Impedence, and i havent had any problems
if it was of the wrong impedence ... what symptoms would i notice?
when i had to replace one of my injectors oh my 88TII i got it from victoria british, and they sent me a Low Impedence, and i havent had any problems
if it was of the wrong impedence ... what symptoms would i notice?
07-23-04, 01:34 AM
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Originally Posted by Fitness Stain
i thought all s4 's were low impedence ...
when i had to replace one of my injectors oh my 88TII i got it from victoria british, and they sent me a Low Impedence, and i havent had any problems
if it was of the wrong impedence ... what symptoms would i notice?
when i had to replace one of my injectors oh my 88TII i got it from victoria british, and they sent me a Low Impedence, and i havent had any problems
if it was of the wrong impedence ... what symptoms would i notice?
Originally Posted by Aaron Cake
It doesn't matter what wire you use. Injectors are non-polar. They're just a solenoid. I just like to keep it consistant.
O.k. So how do I connect the resistors?
-Fanis
Last edited by FxF; 07-23-04 at 01:40 AM.
07-23-04, 07:27 AM
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Originally Posted by Aaron Cake
Put them in the plugs just before the injectors. There is a wire (I think black w/yellow) that is constant 12V. That's the best place.
Originally Posted by FxF
So how do I connect the resistors?
07-23-04, 08:15 AM
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Originally Posted by NZConvertible
IMO the best place is at the ECU. No engine heat, no engine vibration.
No offense, but if you don't know how to install a resistor into a wire, then you should get someone with a bit of automotive electrical experience to do this for you. This needs to be done right.
No offense, but if you don't know how to install a resistor into a wire, then you should get someone with a bit of automotive electrical experience to do this for you. This needs to be done right.
No offence taken.
The RX-7 is not a playground so I PLAY the stupid guy in order to get a complete and right answer. Automotive electrical is not what I do for a living but I no beginner and a fast learner. I am getting different answers on what colour the constant 12V is.(you can read this in the earlier posts) Aaron Cake thinks its the black w/yellow and Yahoo88 the green wire.
Could someone that has experience on this, give me a straightforward answer? Can u help me NZConvertible? I liked the near the ecu idea.
Last edited by FxF; 07-23-04 at 08:21 AM.
07-23-04, 08:51 AM
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07-23-04, 08:59 AM
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Originally Posted by Aaron Cake
I doesn't matter WHAT wire you put the resistor in. Electrically, it is equivelant. The injectors are non-polar. Connect them any way you feel like.
If the above stands, the process is not something really difficult.
07-23-04, 09:27 AM
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Originally Posted by Aaron Cake
Correct.
I'll try to take some photos of the installation and post it here when I'll do it.
-Fanis
07-23-04, 09:46 AM
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Originally Posted by NZConvertible
IMO the best place is at the ECU. No engine heat, no engine vibration.
.
.
07-26-04, 05:10 AM
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Originally Posted by FxF
Can u help me NZConvertible? I liked the near the ecu idea.
If you install the resistors at the injectors, you can install them into either of the injector's two wires for the same effect. Alternatively locate the four injector wires at the ECU (using the wiring diagram) and install the resistors there.