im runnin a f22b dohc in my 93 si lude on the h23 tranny and ecu. Is the h23 ecu pretty close or will i need to tune it later on?

 

Its close enough that you won't notice the difference from NOT having the p39 (f22b dohc ecu). In the choice of tuning - anything runs better and has more power once tuned properly.

 

ran the exact same setup as u for a while...and to answer your question the h23 an f22 are almost identical in evry way so no u wont notice the difference as mentioned...btw did u wire a knock sensor on your f22???

 

not yet thats my only cel.

 

just wire in the knock sensor and shift at 6500 roughly...beleive me...i blew my old dohc f22 beating it till i could se the connecting rods from outside the car

 

Obviously tuning is going to make any engine better, but as was stated before you'll be fine in the meantime.

I suggest getting some cams for that engine. If you're going to tune the engine you might as well have a bonafide reason to do so. They're cheap and you'll have a reason to rev higher than 5500 rpm too.

Pirate