I have a 99 civic si and im doing a motor swap! Im swapping it to a 2000 gsr motor...i was wondering will my ecu for the civic si work on the gsr?

 

it will work, but not good..

 

what do you mean by not good?

 

Anyone else know?

 

vtec will be higher up in the rev range from the 4400. no control of iab's.
conservative timing compared to gsr maps on high cam.

 

The only thing good about the si ecu is that it doesn't have butterflys so you can get a better flow. But you will also need a better intake manifold. Correct me if i'm wrong

 

so the b16a2 ecu will make the gsr motor hit vtec later than it would with the gsr ecu?

 

someone please reply

 

anyone?

 

you could chip the ECU w/ uberdata or something along those lines. the only thing you would be lacking is IAB control because i'm pretty sure the si ECU does not have an IAB output. for more info on uberdata, check out this site:

http://home.mn.rr.com/keebler65/honda

 

thanx for the reply...im definitly going to check it out...but what is IAB?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by juniestyle &raquo;</TD></TR><TR><TD CLASS="quote">thanx for the reply...im definitly going to check it out...but what is IAB?</TD></TR></TABLE>

Intake Air Butterflys (present in all B18C1 manifolds).

 

thanx...so basically vtech wont hit early as it would do for a b18c1 ecu...am i correct?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by juniestyle &raquo;</TD></TR><TR><TD CLASS="quote">thanx...so basically vtech wont hit early as it would do for a b18c1 ecu...am i correct?</TD></TR></TABLE>
it's VTEC.

the B16 ECU will run the GSR leaner than it should be run.
It will set VTEC point higher than the GSR wants it.
it will not open the secondary intake runner.

Pick up a P72, run the extra wire and enjoy the C1.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Edgecrusher &raquo;</TD></TR><TR><TD CLASS="quote">you could chip the ECU w/ uberdata or something along those lines. the only thing you would be lacking is IAB control because i'm pretty sure the si ECU does not have an IAB output. for more info on uberdata, check out this site:

http://home.mn.rr.com/keebler65/honda</TD></TR></TABLE>

the 99 si ecu is obd2, you cant' chip it. i wouldn't run it...do what the guy above me says

 

oops...i forgot im boosting it...will that make a difference!!!

 

bump~

 

to run boost properly you need to convert to OBD1 and tune it.