right now i have a 1990 civic dx with a 1993 ls swap. im planning on building ls-vtec with a b16 head. my question is what ecu, harness, head (b16 head but what year), do i use. and what distributor do i need?

 

Any b -series vtec head will work. They all flow about the same with the exception of the itr. The year doesn't matter much as long as it is in good condition.

For the wiring harness you'd want to just modify your existing one

ECU:
The easiest as far as wiring would be concerned is the b16a1 ecu's (pr3, pw0).
I prefer to run an obd1 ecu like a chipped p28 or a chipped p30, but this requires more wiring and an obd1 vtec distributor.
When I first did my lsvtec it ran fine with a pr3.

You match the distributor to the ecu you are running:
pr3/pw0, you can use a b16a1 distributor or modify a 90-91 ls one (not really recommended)

obd1 ecu, you need an obd1 (92-95) vtec distributor or again you can modify a 92-95 ls distributor.


Note: I just noticed you have a 93 ls swap. Was your car converted to obd1 electronics when the swap was done? Or do you run a 90-91 ls distributor and ecu?

 

everything on my swap is 93 ls. nothing modified.
so i need:
1-b16a head
2-pr3 ecu
3-crx si harness or modify my ls harness

 

If yours retained all 93 parts as you say it did you will need.
1. Any B16 head
2. P28/P72/P61 ECU
3. Modify your LS harness, CRX Si will not work, its pre-OBD.
4. OBD1 DOHC VTEC distributor, which aren't cheap.
If I am wrong someone let him know but I am pretty sure.

 

please someone double check but if he is right thanx alot

 

resistor box yo!

 

n/m im stupid
its already swapped

 

nothing modified????????

did u convert to obd1 or are u just guessing??

 

there arent any resistor boxes in my swap now

 

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