gsr motor. si ecu?
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gsr motor. si ecu?
when i first installed my 99 usdm gsr motor into my 99 ex civic, we wired it up to a 99 si ecu. i was wondering what would be the losses of using that ecu with the gsr motor. i was also wondering what would be the proper ecu to use for the gsr. thank you
Modified by blackie at 3:11 PM 11/1/2005
Modified by blackie at 3:11 PM 11/1/2005
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Re: gsr motor. si ecu? (blackie)
the correct ecu would be a p72. well with an SI ecu your vtec crossover is different and you may run a little rich......sorry can think right now....... 
for more info
for more info
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"the correct ecu would be a p72. well with an SI ecu your vtec crossover is different and you may run a little rich......sorry can think right now....... for more info"
would it affect hp and tq? with that ecu, would i be able to plug and play or would i have to do some modifications?
would it affect hp and tq? with that ecu, would i be able to plug and play or would i have to do some modifications?
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Re: (blackie)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackie »</TD></TR><TR><TD CLASS="quote">would it affect hp and tq? with that ecu, would i be able to plug and play or would i have to do some modifications?</TD></TR></TABLE>
just get a p72 ecu they are all over the place and pretty cheap,......actually pm me if you want to buy one i think i have some
just get a p72 ecu they are all over the place and pretty cheap,......actually pm me if you want to buy one i think i have some
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Re: gsr motor. si ecu? (blackie)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by blackie »</TD></TR><TR><TD CLASS="quote">when i first installed my 99 usdm gsr motor into my 99 ex civic, we wired it up to a 99 si ecu. i was wondering what would be the losses of using that ecu with the gsr motor. i was also wondering what would be the proper ecu to use for the gsr. thank you
</TD></TR></TABLE>
The GSR intake manifold also has secondary butterfly valves that open different intake runners. The Si Ecu won't open these, so you'll lose that. Also, the Si Ecu will engage Vtec at 5500rpm instead of the GSR's 4400rpm. You should have about as much power (haven't seen dyno sheets of this before), but you'd be best off using a p72 Ecu that was made for the motor. Other options would be a chipped p28 or chipped OBD1 p72 to make a little more power.
</TD></TR></TABLE>
The GSR intake manifold also has secondary butterfly valves that open different intake runners. The Si Ecu won't open these, so you'll lose that. Also, the Si Ecu will engage Vtec at 5500rpm instead of the GSR's 4400rpm. You should have about as much power (haven't seen dyno sheets of this before), but you'd be best off using a p72 Ecu that was made for the motor. Other options would be a chipped p28 or chipped OBD1 p72 to make a little more power.
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Re: (blackie)
Get rid of the gsr intake manifold to free up some of the power because of the secondary butterflies in the gsr mani, like stated before. ideally a p28 chipped is you best bet getting rid of the gsr intake mani.
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Re: (rising_son97)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by rising_son97 »</TD></TR><TR><TD CLASS="quote">Get rid of the gsr intake manifold to free up some of the power because of the secondary butterflies in the gsr mani, like stated before. ideally a p28 chipped is you best bet getting rid of the gsr intake mani.</TD></TR></TABLE>
the gsr mani is good to keep low end power, but getting rid of it (and going with a skunk2 or whatever) will free up top end but lose some low end. main thing you have the right ecu in relation to you manifold. you CAN chip a P28 to open secondary butterflies if you know someone that knows how. my suggestion is eitehr to use a P72, or chipped P28 with secondaries fuctions (gotta have a OBD1 conversion harness as well). the Si ecu will plugnplay and run seemingly fine but wont be optimal.
the gsr mani is good to keep low end power, but getting rid of it (and going with a skunk2 or whatever) will free up top end but lose some low end. main thing you have the right ecu in relation to you manifold. you CAN chip a P28 to open secondary butterflies if you know someone that knows how. my suggestion is eitehr to use a P72, or chipped P28 with secondaries fuctions (gotta have a OBD1 conversion harness as well). the Si ecu will plugnplay and run seemingly fine but wont be optimal.
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"my suggestion is eitehr to use a P72, or chipped P28 with secondaries fuctions (gotta have a OBD1 conversion harness as well). "
i need the conversion harness for the p28 or either on of the two? anyone know anything about problems with the immobilizer?
i need the conversion harness for the p28 or either on of the two? anyone know anything about problems with the immobilizer?
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