one-wire alternator?
#1
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one-wire alternator?
I'm thinking about switching to a one-wire alternator on the crx to simplify the car some more but wonder if I will encounter any problems with not having the ECU send (or get) signals from the alt while the car is running. I'm not familiar enough with the exact control scheme when it comes to what the stock Honda ECU does when it comes to the alternator. Does anyone here run a one-wire alternator or know if I would have problems running one? I'm about to rebuild one and this is one of the options I am given by my alternator guy.
FWIW the car is a 91 CRX HF converted to OBD1 running a P28 with a basic all motor setup. I tuned it using Crome Pro. So far it's run 12.0@110 but we haven't gotten a good run out of it since the alt took a crap lol. Hoping to get some 11 sec passes during the Houston IFO.
thanks
Mike
FWIW the car is a 91 CRX HF converted to OBD1 running a P28 with a basic all motor setup. I tuned it using Crome Pro. So far it's run 12.0@110 but we haven't gotten a good run out of it since the alt took a crap lol. Hoping to get some 11 sec passes during the Houston IFO.
thanks
Mike
#2
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Re: one-wire alternator?
The ECU just sends a low charge output. You can disable it on a stock alt and do the same thing. You just have to power the alt with the blk/yel or run a one wire alt.
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#10
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Re: one-wire alternator?
would this only be an option if you had a standalone or could hondata users do this also? seems like the other wires are there for some reason.....
#13
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Re: one-wire alternator?
Two of them are for the dummy lights, the other is a low/high charge circuit. You can remove all of them BESIDES the Black/yellow wire. It needs that to charge the battery. No 12v going to the black/yellow wire, not charging alt.
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#18
Re: one-wire alternator?
Less wires to run and no point in running unneeded wires on some of these standalone ecus since they are logging voltage.
edit: logging was the wrong term, i meant to say it like what tepid is saying.
edit: logging was the wrong term, i meant to say it like what tepid is saying.
Last edited by redboost10; 01-27-2011 at 05:45 AM.
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Re: one-wire alternator?
How does it log voltage if you cut those wires off? I could have sworn one of the wires tells the ecu the voltage. If not where are you getting the data for voltage? Does the ecu read it elsewhere?
#22
Re: one-wire alternator?
keeps the voltage in the "system" steady.
in a factory vehicle the alternator will go into low mode and run the vehicle at around 12.5-13 volts when there arent a whole lot of accessories on that will pull much current
when the A/C, rad fan, high beams...etc are on it will go into HIGH mode 14 - 14.5 volts to supply more voltage to these accessories to keep the current in the circuits down.
in a factory vehicle the alternator will go into low mode and run the vehicle at around 12.5-13 volts when there arent a whole lot of accessories on that will pull much current
when the A/C, rad fan, high beams...etc are on it will go into HIGH mode 14 - 14.5 volts to supply more voltage to these accessories to keep the current in the circuits down.
#24
Re: one-wire alternator?
keeps the voltage in the "system" steady.
in a factory vehicle the alternator will go into low mode and run the vehicle at around 12.5-13 volts when there arent a whole lot of accessories on that will pull much current
when the A/C, rad fan, high beams...etc are on it will go into HIGH mode 14 - 14.5 volts to supply more voltage to these accessories to keep the current in the circuits down.
in a factory vehicle the alternator will go into low mode and run the vehicle at around 12.5-13 volts when there arent a whole lot of accessories on that will pull much current
when the A/C, rad fan, high beams...etc are on it will go into HIGH mode 14 - 14.5 volts to supply more voltage to these accessories to keep the current in the circuits down.
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