pr3 ecu vs. ls/vtec

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Jan 11, 2007 | 05:26 AM

caspers_hatch

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From: DC Metro

pr3 ecu vs. ls/vtec

I am sure people run this set up, how did it work for you? Any leaning out issues? Thanks.

90' CRX Si
b18b1 bottom
b18c5 head
00'ITR cams
I,H,E

Jan 11, 2007 | 05:31 AM

Furyof4

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From: SE, PA, usa

Re: pr3 ecu vs. ls/vtec (caspers_hatch)

Your going to need to chip the pr3 with BRE and have it tuned or tune it yourself. A stock pr3 will run lean on that motor.

Jan 11, 2007 | 05:53 AM

crxnj

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From: nj

Re: pr3 ecu vs. ls/vtec (caspers_hatch)

it will run good..Yes a bit lean but you wont blow the engine .

Jan 11, 2007 | 06:15 AM

crx_si-r

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From: NoRthERn Cali

Re: pr3 ecu vs. ls/vtec (mr.speaker)

im gettin ready to run the ls vtec in a bit but i was gonna run a Pw0 will that one work out better than a PR3?

Jan 11, 2007 | 06:29 AM

caspers_hatch

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From: DC Metro

Re: pr3 ecu vs. ls/vtec (mr.speaker)

All the archived searcnes that turned up show people run in with great success.

I am new to obd0, i usually do obdI builds. Do i have to make any changes to the harness? I assume i have to add the vtec/knock wires at the ecu....Anyone have a link to a pinout.

I will post some pics later, this is my neighbors (49 yrs old) CRX Si....he wanted something good on gas, with some "pep", so we built this thing.

Jan 11, 2007 | 06:39 AM

crx_si-r

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From: NoRthERn Cali

Re: pr3 ecu vs. ls/vtec (caspers_hatch)

go here ....
http://tech2.hybridgarage.com/...pr3_a

Jan 11, 2007 | 07:08 AM

crxnj

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From: nj

Re: pr3 ecu vs. ls/vtec (crx_si-r)

the ls block has no place for the knock sensor so you'll have to modify the block or "ground out" that wire so it doesnt throw a code...a knock sensor code will make the car run like absolute ****...but still add the vtec wire for 2nd o2 sensor,vtec pressure/ground and vtec solenoid..

crx_si-r the obd0 pw0 and pr3 are basically the same thing so theres no advantage running one or the other..

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Jan 11, 2007 | 09:08 AM

caspers_hatch

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From: DC Metro

Re: pr3 ecu vs. ls/vtec (mr.speaker)

Thanks bro!!

Jan 11, 2007 | 11:03 AM

joethejoeman

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From: summerville, sc, usa

Re: pr3 ecu vs. ls/vtec (caspers_hatch)

so that diagram will work w\ a pwo and obdo ?

Jan 12, 2007 | 06:06 AM

#10

crxnj

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From: nj

Re: pr3 ecu vs. ls/vtec (joethejoeman)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by joethejoeman »</TD></TR><TR><TD CLASS="quote">so that diagram will work w\ a pwo and obdo ?</TD></TR></TABLE>

yes

Jan 12, 2007 | 11:46 AM

#11

Nerologic

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From: San Diego

Re: pr3 ecu vs. ls/vtec (crx_si-r)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by crx_si-r »</TD></TR><TR><TD CLASS="quote">im gettin ready to run the ls vtec in a bit but i was gonna run a Pw0 will that one work out better than a PR3?</TD></TR></TABLE>

false...

they are pretty much the same maps, just vtec kicks in lower with the pw0...

but yeah get its chipped, i ran the feels PW0 on my b20-v and i was still super lean even the mugen was leaning out in the midrange