Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedance.
10-28-2005, 01:17 PM
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Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedance.
These peak and hold injectors(ie DSM 450) need ~4Amps at their peak state. But Honda ECU's were designed for high impedance injectors (~12ohm) which supply ~1Amp. I understand why you can put a resistor pack or a couple 10ohm resistors in series with them so the driver circuitry/injectors doesn't burn out. But if these peak and hold injectors need 4Amps, but are only recieving 1. Don't they open slower? and probably not run as well(or in theory at all). Why do these things work then?
Modified by V8MeatHead at 3:18 PM 10/28/2005
Modified by V8MeatHead at 3:18 PM 10/28/2005
10-28-2005, 03:24 PM
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Re: Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedan
lots of people use them and i have yet to see a problem, but my idea is that the low impedence injectors wich open faster than a high impedence injector in the first place will just be as slow as a high impedence injector.
10-29-2005, 07:04 AM
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Re: Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedan
Not all Honda ecus are saturated. OBD0 is peak/hold, and provide the "proper" voltage.
10-31-2005, 01:21 PM
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Re: Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedan
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rainforest »</TD></TR><TR><TD CLASS="quote">lots of people use them and i have yet to see a problem, but my idea is that the low impedence injectors wich open faster than a high impedence injector in the first place will just be as slow as a high impedence injector.</TD></TR></TABLE>
ya your probably right.
ya your probably right.
10-31-2005, 01:38 PM
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Re: Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedan
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drdisco69 »</TD></TR><TR><TD CLASS="quote">Not all Honda ecus are saturated. OBD0 is peak/hold, and provide the "proper" voltage.</TD></TR></TABLE>
They use a resister box.
They use a resister box.
10-31-2005, 03:55 PM
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Re: Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedan
Yes, I am aware of that. I was pointing out that not all Honda ecus use saturated injectors, as implied in the original post:
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by V8MeatHead »</TD></TR><TR><TD CLASS="quote">But Honda ECU's were designed for high impedance injectors (~12ohm)</TD></TR></TABLE>
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by V8MeatHead »</TD></TR><TR><TD CLASS="quote">But Honda ECU's were designed for high impedance injectors (~12ohm)</TD></TR></TABLE>
11-01-2005, 05:23 PM
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Re: Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedan
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drdisco69 »</TD></TR><TR><TD CLASS="quote">Yes, I am aware of that. I was pointing out that not all Honda ecus use saturated injectors, as implied in the original post:</TD></TR></TABLE>
I was mostly implying the newer ones. which I probably should have stated, they also produce the "proper" current but I am sure you are aware of that as well.
I was mostly implying the newer ones. which I probably should have stated, they also produce the "proper" current but I am sure you are aware of that as well.
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11-01-2005, 10:11 PM
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Re: Why do low-impedance peak and hold injectors work with an ECU that was designed for High Impedan
Great you know the formula, but now you must learn how to apply it.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drdisco69 »</TD></TR><TR><TD CLASS="quote">the "proper" voltage.</TD></TR></TABLE>
Im sorry try again.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by drdisco69 »</TD></TR><TR><TD CLASS="quote">the "proper" voltage.</TD></TR></TABLE>
Im sorry try again.
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