i own a 90 crx DX, and am switching it to multi point before the swap.... i am not clear on how to do this, it is the first time i am doing this. I have the Si wiring harness with the resistor box. any hints, or guidelines i can follow?

 

http://hybrid2.honda-perf.org/tech/4gdxtozc.html
this is a good link. also use search and research it on this board. it's been covered in depth.

 

hasport sells the wirring conversions.

 

can i get that hasport link please?

 

i need it too

 

http://www.hasport.com/

 

i need info on a head swap on my 1990 civic hatchback with a d15b2 dual point injection motor. Im going to put a 91 si head on it, and i need to know how much of a pain it is to redo the wiring harness for the multiport injection head. if you could give me some more links that would help alot too.

 

i'm having a fun time with it

 

just convert using your existing dx harness.. dont try swapping the whole wiring harness.. means more work...

here are some useful links:
be sure to read all of it and try to analyze this carefully...
http://www.westworld.com/~joe_r/4gdxtozc.html
http://www.deepstaged.net/dxtosir.htm
http://www.geocities.com/teampimports/fuelinj.html
if you guys search carefully in this board you will find a lot of info... also search the net
HTH

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90’hatch &raquo;</TD></TR><TR><TD CLASS="quote">i need info on a head swap on my 1990 civic hatchback with a d15b2 dual point injection motor. Im going to put a 91 si head on it, and i need to know how much of a pain it is to redo the wiring harness for the multiport injection head. if you could give me some more links that would help alot too.</TD></TR></TABLE>

the head itself has no wiring differences, in fact it's the exact same head except for the cam and valve springs. If you're also swapping the intake mani at the same time then follow the link above.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thumpu77 &raquo;</TD></TR><TR><TD CLASS="quote">

the head itself has no wiring differences, in fact it's the exact same head except for the cam and valve springs. If you're also swapping the intake mani at the same time then follow the link above.</TD></TR></TABLE>

okay guys lets get this all right.... first off a b2 head w/ Intake manifold has DPFI
and the SI head has MPFI... there is a difference in wiring there... also to note there is a difference with the SI and DX heads... DX heads got nonvtec aggressive cams and valves and port flow... SI heads on the other hand got cam retainers which the DX dont got... and it has more aggressive cams... so you really got to covert DPFi to MPFI follow the links i gave you and research the mini-me writeups...

also dont forget to get that oil jet screw off between the 2 and 3 cylinders of the block you wont have vtec if you dont... better yet, get your research done...
a lot of good writeups around the board just research it... pretty much its all the same concept except you got to keep on consideration the obd system... it has a alot of determining what your overall setup will be... which means lots of research ... hours and hours of endless research just to get this project right...


HTH

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92integra_gs &raquo;</TD></TR><TR><TD CLASS="quote">first off a b2 head w/ Intake manifold has DPFI
and the SI head has MPFI... </TD></TR></TABLE>

It's not the head that determines DPFI or MPFI it's the intake manifold. you can run an Si head w/ DPFI or a DX w/ MPFI.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 92integra_gs &raquo;</TD></TR><TR><TD CLASS="quote">DX heads got nonvtec aggressive cams and valves and port flow... SI heads on the other hand got cam retainers which the DX dont got... and it has more aggressive cams... so you really got to covert DPFi to MPFI follow the links i gave you and research the mini-me writeups...

also dont forget to get that oil jet screw off between the 2 and 3 cylinders of the block you wont have vtec if you dont... better yet, get your research done...
a lot of good writeups around the board just research it... pretty much its all the same concept except you got to keep on consideration the obd system... it has a alot of determining what your overall setup will be... which means lots of research ... hours and hours of endless research just to get this project right... </TD></TR></TABLE>

All of this only applies if you're installing a 92 or newer Si head (Z6 or Y8). The 88-91 Si head (AKA D16A6) is NON-VTEC and uses the exact same casting as the DX (D15B2). You do not remove the oil control jet when installing a 88-91 Si head.

 

i know a guy who ran a d16 on a dx, but he kept the dx manifold and dual injectors. so if its just a head swap you don't really need to re-wire. but unless your current head is no good, there is no reason to do this swap.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by thumpu77 &raquo;</TD></TR><TR><TD CLASS="quote">

It's not the head that determines DPFI or MPFI it's the intake manifold. you can run an Si head w/ DPFI or a DX w/ MPFI.

All of this only applies if you're installing a 92 or newer Si head (Z6 or Y8). The 88-91 Si head (AKA D16A6) is NON-VTEC and uses the exact same casting as the DX (D15B2). You do not remove the oil control jet when installing a 88-91 Si head.</TD></TR></TABLE>

i know its not the head that determines DPFI or MPFI... thats why i also include the Intake manifold part... yea i guess i forgot the part of the A6 is not vtec.. i remember reading somewhere in the board before that the A6 uses the same cast except w/ much more aggressive cams than the b2 (thx for the 411) ... but yes you can ran a A6 SI head w/ DPFI... but is the point of having a SI HEAD in DPFI.. you dont got power w/ that... you might as well change to MPFI ..uses all the potential power of that new head... i recommend it but its up to you...
and using a 88-91 SI HEAD (D16A6) you dont need to take that oil jet control off.. i was thinking of my mini-me... w/ the Z6 head