ocd_2k3

hey you guy i just got a used motor and i was wondering if i should used the stock ecu or the JDM one that came with the motor. Can anyone tell me the differences between the both of them

INTJ

Guess nobody knows. I can't imagine you would have any issues except maybe smogging it. I would run it and see.

hollywood_s2k

You would have to use the keys and ignition from the jdm one wouldnt you?

Whats the difference in them anywho?

revmatch

is it an f20 or f22? i think japan eventually got the f22 later, whereas europe kept the f20 until now. i assume yours is an f20?

since the jdm motor makes a touch more hp due to a little more compression, i would think you should stick to using the jdm ecu that 'should' be tuned to that motor. the mapping on a usdm f20c ecu could be slightly tamer since our motors have a bit less compression. not suer if this is 100% tho but makes sense to me. you also may run into hvac issues, etc. too - u never know, but could always try a usdm ecu on the motor, may work fine.

SOHCmyDOHC

JDM ecu = no immobilizer and tuned for higher comp ratio

Anyone feel free to correct me if I'm wrong

hollywood_s2k

^^^ Sounds about right.

It may not have all of the emissions control like ours do also. But I dont know.

i</3speedbumps.

for anyone who is wondering, jdm f20c do pass california smog.

Duke of Cruel

use the jdm ecu
DoC

moogleii

That won't run so well on 91 tho right?