F22A To F22B

[Red2010_2008]

Hey Guys Ive Been Wanting To Do A Motor Swap In My 92 Honda Prelude, Right Now It Has A F22 Sohc, I Was Wandering What It Would Take To Do A F22B Dohc Swap For a 92 honda prelude. There a non vtec motor so im sure it wouldnt be to hard, but i hear when people do the jdm motor swap their always throwin codes and such....so i was wanderin if i can get some help.

[spiffyguido]

So your current engine is stamped F22A? Is it OBD1 or OBD2?

[Red2010_2008]

OBD1 and The F22B Is OBD2 Im Pretty Sure??

[spiffyguido]

Most of what I'm reading suggests that the F22B is OBD1, because it's a JDM engine. If your F22A is OBD1, this should make the swap pretty easy because you won't have to deal with a bunch of electrical problems.

You're getting an F22B right? Not a F22B1 or F22B2?

[Red2010_2008]

yea jus the f22b right now i have the f22a1 i thnk or w.e is the sohc non vtec.

[spiffyguido]

Do you know yet if the transmissions are the same between those two? They should be. If the trannies mate up, and if both engines are OBD1, the swap should be a breeze. We can dig deeper though.

[Red2010_2008]

Thanks for everything, was also gunna ask, what ecu should i run with the JDM F22B? Since Its DOHC

[spiffyguido]

The stock ECU for the JDM F22B is the P39. I'd use that if you can get one. You should currently have a P12 ECU for your engine. Both of these ECUs are OBD1 ECUs, so you may even be able to use the P12 that you have. If you do go that way though, you may need to change the tune on the ECU to work with a DOHC engine.

There's some good info on this site:
http://wikitest.pgmfi.org/twiki/bin/vie ... cuFamilies

Does that help?

[Red2010_2008]

also was wandering, i heard you had to have a knock sensor installed? or people talkin about installing a knock sensor.... if i get the ecu that already has the knock sensor(the p39) and do the f22b will i be alright on that?

[spiffyguido]

Yeah, you should be. As long as the engine has the knock sensor installed, which it must.

[Red2010_2008]

OK Cool thanks