I swear I heard this somewhere, could someone confirm this? and tell me why this is?

 

i doubt its that much better

 

Its JDM; its automatically better

 

well the JDM ecu is probably calibrated to run on higher octane fuel, which is pretty much standard in JDM land - the USDM ITR ecu is set for 92 octane or better, so that would probably be a better choice - why not ditch them both and get a reprogrammed p28? or a Hondata???

 

Maybe he likes his knock sensor

 

I am also considering the reprogramed p28, Im just afraid that they dump too much fuel, and lead to bad gas milage and carbon deposits... any thoughts?

 

only if you get an open loop program like mugen

 

i have a skunk2 chipped p28 and yes, it does run EXTREMELY rich without any other tuning. that doesn't mean you shouldn't get a chipped p28 though. the chip is just a baseline program that you can tune from using a VAFC or other air/fuel controller.

 

well, lets do some math,

obdII-I harness 200
p28 chipped ecu 250
vafc 250

total $700

how much more is hondata???

 

the jdm 1 is better

 

I got rid of my JDM ECU because of the speed limiter it had. As I understand it, USDM ECU's do not have a speed limiter. I'm running a chipped p28 and the limiter is no longer an issue.

 

Yeah JDM ITR's are governed at 118 MPH Sucks hehe.

 

Why would you even consider an OBD1 P28 if you were just going to use a VAFC? They work fine on OBD2 cars.

 

Is there a difference in RPM limit from the two?

 

I dyno'd back to back the USDM and JDM ITR ecu and gained 5-7hp everywhere with the JDM R ecu. Also I was running 93 octane and no other changes made inbetween runs.
I only got rid of the JDM ecu because I went boost otherwise I would have kept it.

scott

 

Like another $200

the difference is the vafc 250 ~ 300 the hondata I bought mine for 450.

 

I have a JDM ITR. According to the tack, I hit the rev limiter at just over 9100, I noticed the day I let my mate have a drive, he drove it like a wusss till I told him to floor it, he then promptly hit the limiter.

PS The speed limit has been bypassed so I dont stop at 112mph or what ever it is, dont know if this upgrade increased the RPM limit as it was done b4 I got the car.

 

Good Information on this old Thread