dohc ecu on sohc

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theB16tegguy

Senior Member
can i hook up a 1988-91 b16 ecu to a 1988-91 crx the only diffrence is one has two cams and the other has one so what im asking is how does the ecu know if there is one or two cams is there an extra sensor on the dohc if anybody can help in any way it would be appreciated. :D
 
IT DOESN'T MATTER THAT THERE DIFFRENT MOTORS THEY STILL BOTH HAVE THE SAME SENSORS WHAT WOULD THE ECU DO TO MAKE RUN DIFFRENTLY ON A D16. TELL ME WHAT????

"IF YOU EXPLAIN MORE ABOUT WHY IT WILL MAKE IT EASIER FOR PEOPLE TO BELIEVE YOU"
 
wow you're an idiot, it does matter that they are different motors you tard.

Different compression, different fuel maps, DOHC vs. SOHC, it wont run right.
 
Originally posted by 92civicb18b1@Nov 16 2003, 09:10 PM
If you want proof of this theory come and test drive/listen to my 94 Ls runnin on a DX ECU.
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Who you talking to?
 
uhh ok, yes sometimes it just so happens that the ECU can adjust enough to compensate for the differences in the motor.


did you ever thing that the calculations might be a bit different for a motor with completely different displacement? how about the differences in timing for a DOHC vs a SOHC. Or I don't know, maybe the fact that THEY ARE COMPLETELY DIFFERENT MOTORS.



It may work, but hey, there are alot of things that "can" work but aren't exactly the right thing to do. The SOHC ECU will have the wrong fuel and ignition curve for the motor. In stock map form, this is a fact, not debatable.
 
Originally posted by 92civicb18b1@Nov 16 2003, 09:10 PM
If you want proof of this theory come and test drive/listen to my 94 Ls runnin on a DX ECU.
Click to expand...

yes it can work. is your motor running the way it should be? no. Why don't you go do 2 dyno pulls, one with the DX ECU, and the other with the LS ECU. Let me know how "perfect" that DX ECU is running your motor.


UNLESS you are running a piggyback computer or a reflash, in which case, you are right.. all the ECU is doing is relaying sensor data, it no longer holds the actual "tuning" of the engine.


no need to get your panties in a bunch, just trying to give you the right information chief.
 
I'm not defending this jackass, I got an obd2 LS ecu instead of obd1 (curtosey of ebay).
 
Originally posted by 92civicb18b1@Nov 16 2003, 09:36 PM
my bad, i was talkin to the b16guy, my ls runs like shit becasue of it. So if anyones got an ls ecu pm me.
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as was I man, sorry, I thought you were saying that if you want proof that it *works*

heh.
 
Originally posted by theB16tegguy@Nov 16 2003, 09:02 PM
IT DOESN'T MATTER THAT THERE DIFFRENT MOTORS THEY STILL BOTH HAVE THE SAME SENSORS WHAT WOULD THE ECU DO TO MAKE RUN DIFFRENTLY ON A D16. TELL ME WHAT????

"IF YOU EXPLAIN MORE ABOUT WHY IT WILL MAKE IT EASIER FOR PEOPLE TO BELIEVE YOU"
Click to expand...

Why don't you yell a little louder, I can't hear you.
 
If you try to run a LS motor with a DX (P06) computer, it will not be happy. Just add a chip, and voila, the P06 computer can run a LS motor perfectly.

Likewise, a PR3 (or PW0) is intended for a DOHC B16A. I know ppl using them to run a D16Z6 nearly flawlessly AFTER CHIPPING THEM.

Remember, the chip defines how the motor will run as much as the ECU.
 
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