Hondalover15

I have a 97 hx that i want to put a y8 head on the y5 block, what do i need to make this work? same ecu or y8 ecu? do i just get a y8 head with the vtec solenoid from the y8 and just bolt it up to the y5?

HondaPartsHero

Basically yes. If you use a 96-98 P2P ECU you're going to have to convert to a 4 wire ECU. Is your car a 5 speed or auto?

EGxBoostFiend

I'm about to do something similar. From everything I've read you use the ecu that matches the head, along with the timing belt that matches the head. I'm still learning too tho so..

kyden

^^ timing belts are all the same for those motors.

EGxBoostFiend

Oh okay that's good to know. Same for all d series motors?

Hondalover15

It's 5 speed, the intake manifold and the injectors from the y5 will work? And I'm obv gunna need to change the head gasket right? Can I use the same head bolts? I need help here guys , I'm gunna by the head tomorrow and I need to know what I'm getting into

slomofo

iTrader: (1)

The heads are pretty much the same, the differences are on the inside where the Y5 has a different cam profile as well as roller rockers. The ECUs are different too, so I'd run the ECU out of the Y8 if I were you.

Hondalover15

What would happen if I was to run the y5 ecu? I'm just wondering

Hondalover15

anyone?

jbpnoman

The Y5 ECU looks for two vtec solenoids. It wouldn't work correctly.

ThiRteeN

Wrong ^ the y5 only has one vtec sol. The vtec kick in rpm is lower using the y5 ecu and since it has the "wild" rocker, vtec wouldn't run right either.

tony_2018

You're probably thinking of the d15b 3 stage vtec, the p2j ecu's. But no the y5 only looks for one solenoid and kicks in around at a low rpm, its just vtec-e.

tony_2018

Not going to run right, you will probably need to convert the hx harness to accept a 4 pin o2 sensor.

dapdabbin

iTrader: (2)

https://honda-tech.com/forums/showpo...9&postcount=13 Here is all you need. I would also use intake exhaust and tranny I mean I would sell it and buy an ex you might make some money doing it. You'd definitely save some guarantee that.