Canadian 95 Civic Cx D15b7 to D16y8 Swap

Hello

My name is Corey and i have decided to make a thread about converting my old d15b7 to a d16y8 vtec.

So far i`ve come across two ways of doing the swap.

1.) Use Stock Harness and Ecu(obd1) by using
D15b7 Distributor
D15B7 Intake manifold with Injectors
D15B7 Exhaust manifold with stock o2 sensor
This will keep the system obd1 according to what i`ve read the internet

D15b7 Motor Mounts
D15B7 Alternator
D15b7 Clutch and Transmission
PLUS a Vtec Controller

2.) Use d16y8 Harness and Ecu(obd2)
Use all stock parts from the d16y8 motor
D15b7 Clutch and Transmission
D15B7 Motor Mounts
Wire in 02 sensor


If anyone has done the swap i would appreciate any input

Thanks

Corey

ps-This is just some basic information

You can't use the D16Y8 harness, it too different. The '92-'95 Civics have a 2-piece harness; one piece is from the engine to the passenger side shock tower, and the second piece is from that connection to the ECU/under dash connectors. The '96-'00 Civics have a 1-piece, that runs from the engine straight to the ECU/under dash connectors.

Your best bet would be to do the #1 option, but with a different intake manifold and different ECU. The D16Y8 intake manifold is way better than the D15B7 one. In fact, it's the best OEM D-series intake manifold.

As for the ECU, you should either 1) get an ECU for the '92-'95 EX/Si (labeled P28). Or, 2) get an OBD1 to OBD2 (A or B depending on the exact year of the ECU) conversion harness, and get the '96-'00 Civic EX ECU (labeled P2P). I'd recommend the P28 route, since it will look for less sensors (including one less O2 sensor), and you won't have to worry about getting a conversion harness for the ECU, it will plug right in to your stock wiring. Both of these options would require you to run the wires for VTEC, to the ECU.

Using the stock 1.5L ECU and using a VTEC controller, is a horrible idea. Using anything to simply activate VTEC isn't enough, it's not going to provide the proper fuel and ignition timing maps. It would never run completely right, and you'd be losing power, all while effectively making VTEC engagement pointless. If you really want to keep the stock ECU, you could send it out to get a programmable chip installed in it, and just run a stock P2P (D16Y8) basemap on it.

Thanks for the quick reply

Going to get the ECU for the '92-'95 EX/Si (labeled P28)(obd1) because it plugs into my stock harness(obd1), makes the project a little simpler.

I'm guessing that all p28 ecu are Vtec

So far so good

Corey

Question !

Does anyone know if the cx distributor will fit on the d16y8.
(Checked on ebay and said they are no compadable)

The car is out of town or i would check myself.

Also i bought the p28 euc and have read that the ignition timing
is different but said it will still run!

Any input would be great.

Thanks

Guy..just a suggestion...Why don't you tried stamping simulation.

Read on the internet that the stock d15b7 dizzy will work on the d16y8.

Need some pointers on wiring up the vtek. Is there some sort of adapter
i can buy ?

thanks

Corey

Hello,

Quick nooby question.

Do you know how to get the to the ecu ?
I know it's behind the glove box someplace just havan't
figured it out yet.