I am shopping for my parts now and want to know, if I can get a full harness from a CRX Si, will it connect to everything properly when I put the new IM on my D15B?
Or will I still need to mod the connectors on it too?

if so

Which requires less modding. Si ->DX or DX->MPFI?

 

a si harness will not plug into your stock dx harness. you need to just use hte si harness for parts

 

just use your stock harness

 

Whenever doing an engine swap, ALWAYS use you're stock harness and modify it.

Unless you're doing some crazy rare engine swap or sumthing, don't be a smart *** H-T.

 

if you want to use an SI harness on a dx car, you have to change the engine harness and underdash harness aswell. it is much easier if you just getto rig your dx harness, or you can buy a harness from rewire.

 

mpfi swap is easy...do it yourself, u will be happier in the end

 

Yeah like everyone said, rewire your exsisting dx harness, and I would recommend not touching the SI harnes for connectors just go cut from the junk yard. The Si harness will not plug in different plugs and wiring.

 

Whats wrong with using the SI wiring? I did and had 0 problems (aside from forgetting to plug everything in the first time...)

I'll admit it was a huge pain in the *** though. It took me roughly 2 days of comparing the SI harness to the dx, running all the wires to the right connectors, swapping connectors here and there. But the end result, in my opinion, is much cleaner. Almost looks like it came stock with the MPFI.... or at least closer than any dx modification can get anyway....

but, i guess if your looking for the easier of the 2, modding the dx is the way to go

 

NO ONE SAID YOU CANT USE THE SI HARNESS...ITS JUST A PAN IN THE *** TO CONVERT IT

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ryanplayjoint &raquo;</TD></TR><TR><TD CLASS="quote">Yeah like everyone said, rewire your exsisting dx harness, and I would recommend not touching the SI harnes for connectors just go cut from the junk yard. The Si harness will not plug in different plugs and wiring. </TD></TR></TABLE>

If he is putting a si engine in his car he would want to use his si plugs, and you are telling this guy to go cut plugs off a different harness for a different engine??

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Tippyman &raquo;</TD></TR><TR><TD CLASS="quote">Whenever doing an engine swap, ALWAYS use you're stock harness and modify it.

Unless you're doing some crazy rare engine swap or sumthing, don't be a smart *** H-T.</TD></TR></TABLE>

I see you are looking in the mirror tippyman!

wtf are you saying -I- am a smart ***?

I just asked a question.

take a chill pill, and READ the posts b4 u make dumb comments on them

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suck my DX &raquo;</TD></TR><TR><TD CLASS="quote">mpfi swap is easy...do it yourself, u will be happier in the end</TD></TR></TABLE>

I never said I wasnt going to do it myself.

I did my own swap so the mpfi should be a breeze, I figure I would ask peeps that had done it b4 I started.

Thanks to everyone for the useful info

 

the main reason for using the stock harness is because at the enginebay -&gt; body harness connector they might be the same plug but the wires are in different spots. This is even more of a pita when using a harness from a different year.

modify the stock harness. You will still need the Si harness for its plugs / extra wiring though.

 

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

I see you are looking in the mirror tippyman!

wtf are you saying -I- am a smart ***?

I just asked a question.

take a chill pill, and READ the posts b4 u make dumb comments on them
</TD></TR></TABLE>

Lol, no, I was saying that because I said it is "ALWAYS" better to use your stock harness, some H-T smart-*** would be like, "What about an LS1 swap into a CRX?"

It was just pre-emptive strike on Honda-TEch sarcasm... lol.

 

I was saying to keep the si wiring harness un-cut and source some injector clips from lanother obd-0 vehicle. If for any reason he needs that si harness later he will kick himself in the pants for cutting wires. Cutting wires is hack city anyway. De-pinning the connectors and re-pinning them to the DX harness in a much better looking install.

 

The connectors that are needed can be found on an obd-0 integra (90-91).

 

thanks for the great info

keep it coming guys

I aint bought the stuff yet

 

I have most of the stuff you need for the MPFI conversion check my sig

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Super Chicken &raquo;</TD></TR><TR><TD CLASS="quote">I have most of the stuff you need for the MPFI conversion check my sig</TD></TR></TABLE>

From what I have read I thought it would be better to upgrade to OBD1

Is that possible with your Items?

 

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

From what I have read I thought it would be better to upgrade to OBD1

Is that possible with your Items?</TD></TR></TABLE>

The intake is from an OBD1+ car. The things you want for OBD1 are the distributor, ECU and 4 wire O2 sensor for the most part. If you are only going MPFI and not upgading anything else then just put an MPFI ECU (PM6) dist (A6) intake and injectors (doesn't matter if they are OBD1 or 0 they just either need or don't need the resistor).

If you want to go OBD 1 now my manifold and injectors and the head would be a good start. Just an OBD1-2 dist, 4 wire o2 sensor, ecu and OBD0-OBD1 ECU conversion harness

 

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

If you want to go OBD 1 now my manifold and injectors and the head would be a good start. Just an OBD1-2 dist, 4 wire o2 sensor, ecu and OBD0-OBD1 ECU conversion harness</TD></TR></TABLE>

sounds good
but, having not done this I am gonna ask some questions.
What would the head do for me other than only swaping the intake, why would I want it?
Is your head ready to mount or does it need resurfaceing?

would you want to upgrade to OBD 1 if it was your car?
what are advantages of that?

I ask all this because I am considering your items strongly
I would rather pay a little more from a H-T guy than get an untested but cheaper set of parts from a junkyard.

I need to get a new dizzy anyway so this has more advantages than just mpfi for me. Maybe I will buy your parts and put off the upgrade to OBD 1 till later and resell what I get from you...hmmmmm

 

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

sounds good
but, having not done this I am gonna ask some questions.
What would the head do for me other than only swaping the intake, why would I want it?
Is your head ready to mount or does it need resurfaceing?

would you want to upgrade to OBD 1 if it was your car?
what are advantages of that?

I ask all this because I am considering your items strongly
I would rather pay a little more from a H-T guy than get an untested but cheaper set of parts from a junkyard.

I need to get a new dizzy anyway so this has more advantages than just mpfi for me. Maybe I will buy your parts and put off the upgrade to OBD 1 till later and resell what I get from you...hmmmmm</TD></TR></TABLE>

#1 if you have the JDM V-tec 15B then you don't want the head just the IM
I'll sell the intake cheaper without the head.
The head doesn't need anything other than a V-tec solenoid

#2 I would upgrade if a) Money wan't a limiting factor b) I wanted v-tec to work seemlessly from say a P28 ECU and have (they say) better tuning abilities.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Super Chicken &raquo;</TD></TR><TR><TD CLASS="quote">#1 if you have the JDM V-tec 15B then you don't want the head just the IM
I'll sell the intake cheaper without the head.
The head doesn't need anything other than a V-tec solenoid</TD></TR></TABLE>

I have a JDM D15B non-vtec, so the head is interesting

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Super Chicken &raquo;</TD></TR><TR><TD CLASS="quote">
#2 I would upgrade if a) Money wan't a limiting factor b) I wanted v-tec to work seemlessly from say a P28 ECU and have (they say) better tuning abilities.</TD></TR></TABLE>

but here is a point that makes the head less interesting.
I would like vtec, but that sounds like ALOT more of a pita than just mpfi

so w/o going vtec what is your opinion of OBD 0 mpfi conv?

 

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

I have a JDM D15B non-vtec, so the head is interesting

but here is a point that makes the head less interesting.
I would like vtec, but that sounds like ALOT more of a pita than just mpfi

so w/o going vtec what is your opinion of OBD 0 mpfi conv?
</TD></TR></TABLE>

The best bang for your buck is the OBD-0 MPFI upgrade

Your next step once you get this setup running would be the OBD-1 V-tec

It would also be easier for you to diagnose any problems you encounter if you are only taking small steps rather than MPFI and OBD-1 and v-tec all at once.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HondaHeddie &raquo;</TD></TR><TR><TD CLASS="quote">
but here is a point that makes the head less interesting.
I would like vtec, but that sounds like ALOT more of a pita than just mpfi
</TD></TR></TABLE>
VTEC = 2 wires
Unless you mean the mechanical side.