how can i know if i need a resistor box?
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Honda-Tech Member
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how can i know if i need a resistor box?
hello...
so i got the safc and 450dsm's. how can i know if i need resistor box?
i have a voltmeter, just tell me how to adjust it and what to masure...
best regards m.g.
so i got the safc and 450dsm's. how can i know if i need resistor box?
i have a voltmeter, just tell me how to adjust it and what to masure...
best regards m.g.
Honda-Tech Member
Joined: Jun 2002
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From: Richmond, Va, usa
Re: how can i know if i need a resistor box? (RACEPAK)
dsm injectors are peak and hold so you need a resistor box. Unless you have a car that already comes with one like an obd0 car.
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Joined: Jul 2005
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From: halifax, canada
measure the resistance (ohms setting) between the injector connectors, approx 2.5 ohms is low resistance, approx 12.5 is high resistance.
If yours measure around 2.5 then you need resistors or a resistor box.
If yours measure around 2.5 then you need resistors or a resistor box.
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Re: how can i know if i need a resistor box? (SOHC_MShue)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SOHC_MShue »</TD></TR><TR><TD CLASS="quote">dsm injectors are peak and hold so you need a resistor box. Unless you have a car that already comes with one like an obd0 car. </TD></TR></TABLE>
so actualy every honda needs a resistor box exept obd0?
so actualy every honda needs a resistor box exept obd0?
B*a*n*n*e*d
Joined: Jan 2004
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From: Phoenix, Arizona
Re: how can i know if i need a resistor box? (RACEPAK)
Let's see if I can clear this up....
Your new injector solution must match the resistance of your old injector solution.
- If your stock injectors are low impedance (2-4Ohms) and your new injectors are low impedance, then you are good to go.
- If your stock are high impedance (10-12Ohms), and your new injectors are low impedance, then you need resistors.
- If your stock injectors are low impedance, and your new ones are high, you're out of luck. Buy some low impedance injectors.
Some basic info
- Low Impedance = 2-4Ohms = Peak And Hold
- High Impedance = 10-12 Ohms = Saturated
- OBD0 Hondas have both low and high impedance injectors in MPFI (1988 - 1991) Most often, Si models haev low impedance, and other models have high impedance.
- OBD1 Hondas have high impedance injectors with a plug that matches OBD0 injectors, no swapping of plugs needed.
- OBD2 Hondas have high impedance injectors, with a plug that must be swapped for aftermarket injectors.
Checking existing injector impedance is as easy as disconnecting the plug, and measuring across the terminals in the injector connector. Use the lowest resistance setting of your meter, normally 300 or 200 Ohm range. Polarity will not matter.
Use this link to see some directions we have published for our customers looking to buy CorrectInjects. http://stores.ebay.com/Tuner-T....html
Hope that helps...
Craig
Your new injector solution must match the resistance of your old injector solution.
- If your stock injectors are low impedance (2-4Ohms) and your new injectors are low impedance, then you are good to go.
- If your stock are high impedance (10-12Ohms), and your new injectors are low impedance, then you need resistors.
- If your stock injectors are low impedance, and your new ones are high, you're out of luck. Buy some low impedance injectors.
Some basic info
- Low Impedance = 2-4Ohms = Peak And Hold
- High Impedance = 10-12 Ohms = Saturated
- OBD0 Hondas have both low and high impedance injectors in MPFI (1988 - 1991) Most often, Si models haev low impedance, and other models have high impedance.
- OBD1 Hondas have high impedance injectors with a plug that matches OBD0 injectors, no swapping of plugs needed.
- OBD2 Hondas have high impedance injectors, with a plug that must be swapped for aftermarket injectors.
Checking existing injector impedance is as easy as disconnecting the plug, and measuring across the terminals in the injector connector. Use the lowest resistance setting of your meter, normally 300 or 200 Ohm range. Polarity will not matter.
Use this link to see some directions we have published for our customers looking to buy CorrectInjects. http://stores.ebay.com/Tuner-T....html
Hope that helps...
Craig
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