Hey guys,
I have a 2000 civic si that has a b18c swap in it. It is still running the stock ecu for the original engine which was a b16a2. Wondering if I should change it out to a different ecu? Which ecu should I use?

 

It would help to switch ecu's because those two motors have different base maps. I dont know if you would feel the difference but it would help. The usdm gsr's (b18c1) have P72's, dont know which ecu runs the jdm b18c.

 

p72 i think

 

Heres an idea: use the ECU that the engine comes from the factory with. What a concept.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by queda &raquo;</TD></TR><TR><TD CLASS="quote">p72 i think</TD></TR></TABLE>

Yep.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OMGWTFBBQ! &raquo;</TD></TR><TR><TD CLASS="quote">Heres an idea: use the ECU that the engine comes from the factory with. What a concept.</TD></TR></TABLE>

Imagine that... I vote for an entire forum filled with nothing but stickies.

 

it depends on which B18C you have.
There's two. GSR and ITR.

GSR = P72
ITR = P73

 

lol your first thread on this topic wasn't informative enough?<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by OMGWTFBBQ! &raquo;</TD></TR><TR><TD CLASS="quote">Heres an idea: use the ECU that the engine comes from the factory with. What a concept.</TD></TR></TABLE>

2000 civic. OBD2B. See an issue with using an OBD2B P72?? Cmon....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B serious &raquo;</TD></TR><TR><TD CLASS="quote">2000 civic. OBD2B. See an issue with using an OBD2B P72?? Cmon....</TD></TR></TABLE>
shhhh, don't tell them. The immobilizer is always a fun surprise.

all though the JDM ECUs do not have it... but they're OBD2a and don't scan using USDM scan tools.

 

I ordered a 1995 gsr ecu but it turns out it is a obd2a. I have not been able to find a 1995 gsr ecu that is obd1. Where can I find these?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by alleycat &raquo;</TD></TR><TR><TD CLASS="quote">I ordered a 1995 gsr ecu but it turns out it is a obd2a. I have not been able to find a 1995 gsr ecu that is obd1. Where can I find these?</TD></TR></TABLE>
did you check the marketplace,craigslist, or ebay?

 

https://honda-tech.com/zerothread?id=2181176

JDM OBD1 B18C ECU 250 SHIPPED

 

hit search (top right in red)
enter P72 ECU OBD1 in the search box
select the marketplace - for sale forum
select post bodies
press next

or

go to ebay
type in P72 OBD1 and press search

stay clear of the chipped ECUs


Why are you searching for an OBD1 ECU? Do you have an OBD2b to OBD1 conversion harness?

 

You can buy an chipped ECU! Just load an GSR program into it!

 

Use your Si ecu and get a VAFC Vtec controller.

You Si ecu should be fine though. You may lose some power at places but you may gain some at places. Also get a skunk2 manifold to use the single runner.

 

I've got the ECU you need for sale, PM me if you want it...