Sorry for the length of this but i have alot of questions. Here is my deal, i have a 1991 CRX with an ls in it, it has all of the original wiring still. I am going to put LS VTEC in it. My setup is going to be a b18a1 block with a gsr head off of a 97 integra. Will everything be plug and play? If not what will i need to do to make it work. Second, can i wire up vtec to the ecu that i have now, or what kind of ecu do i need to get. And lastly is there a vtec distributor that would work on a gsr head and plug right in to my crx harness or what can i do? Thanks for reading.

 

you need to search this is covered so many times it's not even funny.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by almostjdmeg &raquo;</TD></TR><TR><TD CLASS="quote">Will everything be plug and play? </TD></TR></TABLE>

No.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">If not what will i need to do to make it work.</TD></TR></TABLE>

Since your harness has no provisions for VTEC, you will need to wire that in. This should help you find the pin locations needed to wire in VTEC, knock sensor, etc. Credit to Katman for the great pic.




<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Second, can i wire up vtec to the ecu that i have now, or what kind of ecu do i need to get.</TD></TR></TABLE>

If you're trying to keep it simple then you need to find an OBD0 JDM PR3 or PW0 ECU. Your OBD0 PR4 LS ECU will not work.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">And lastly is there a vtec distributor that would work on a gsr head and plug right in to my crx harness or what can i do? Thanks for reading.
</TD></TR></TABLE>

The only dizzy that will work with this set-up (if staying OBD0) is a JDM OBD0 B16A distributor. they were never offered here in the US on a factory honda/Acura, but luckily Distributor King sells brand new ones HERE

Pics of siad dizzy:







Note the correct OBD0 plugs:



You will also need to use your B18A injectors, and you will definately want to ditch the GS-R intake manifold because unless you want to do a full OBD1 conversion and run an OBD1 P72 GS-R ECU you won't even be able to take advantage of the GS-r intake's dual butterfly system.

I'd suggest an aftermarket IM such as Skunk2, Blox, etc. You may need to use the B18A TB as well or try to find a OBD0 B16A TB.




Modified by B18C5-EH2 at 11:36 AM 8/15/2008

 

i was told you can use a ls dizzy (thats obdo)if you just cut one leg off. is that true? i'm just wondering cuz im going to be running an obdo lsvtec also.thanks.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by efhatch_311 &raquo;</TD></TR><TR><TD CLASS="quote">i was told you can use a ls dizzy (thats obdo)if you just cut one leg off. is that true? i'm just wondering cuz im going to be running an obdo lsvtec also.thanks.</TD></TR></TABLE>

I wouldn't do it that way. You'll never get the proper ignition timing with a jack legged LS distributor. I've seen it done before and the engine ran like **** - whether or not it was solely due to the jack legged dizzy I can't say.

 

so it can be done.well if im taking my time to build everything rite i might as well just do it rite.i know where i can get an 0bdo vtec distributor ne way so i will just do that.thanks 4 the info.