Would an F20B swap directly into a 1997 Prelude? I know it will bolt it but if I used the F20B ECU will it all plug in and work or will I have to wire some stuff even if I have the F20B ecu?

 

you most likely will have all the connectors you need, and everything should be in roughly the same place, so I think you'll be just fine. you just need to make sure you have an obd2 ecu...

 

Could I run it off my H22 ecu and harness if I swap oil pump, dizzy, alt, cams, etc over? At least gently run it?

 

I think the H22 ecu would run it but poorly. Maybe get an ECU that is tuned for the motor, example being P28w/hondata S300 or S200. Didn't that F20B only come in an automatic and was OBD2? I though I heard that somewhere. Maybe that was the JDM 2.3L vtec I was thinking about, oh well.

 

As long as it passes emissions I dont care about it running poorly. F20Bs came with manuals PCB ecus IIRC. But I dont htink japanese emissions standards are the same as US. I figure run the H22 ecu with a piggyback to pass emissions and then swap the hondata or whatever in after.

 

Can't use hondata to pass emissions??? I would think you would be able to pass emissions easily with hondata given the right tune.

 

Not OBD2. They plug-in in NH. I figure I could make it as h22 as possible and pass emission.

 

I believe the F20B ecu is OBD2B ecu, where as the stock 5th gen ecu is OBD2A, so you may have different connectors/ pinouts.

 

the f20b comes in both auto and 5spd both lsd, the h23 only came in auto out of the accord wagon

 

Anyone know how good the STOCK motor is at holding boost? I know its 11:1 and the type-s cams but shouldnt it be better than an H22?

 

I swaped the F20B in two Lude´s in Germany-.......watch out sry its all in German Language http://www.hondapower.de/forum/showthread.php?t=99033

try something with a Translator

 

all f series block absolutely love boost thats wat honda prepared them for,thats y they have cast sleeves instead of the fiber reinforced sleeves,throw 8lb at a semi stock motor just for a laugh,ul wna decompress it 1st though if ya can though my mate didnt and its still holding together and goes nuts,did have fuel probs though till new pump and regulator