When i bought the skunk 2 ECU for my 01 gsr i had to buy the obd-I harness for it to work. So by what your post says, when i went from the obd-II to the obd-I, I didnt gain in anyway or make the car perform better?

 

when you went from obd2 to obd1 you enabled yourself to run an aftermarket ecu/chip which in turn makes your car perform better/worse/whatever. there arent too many company's out there that chip obd2 ecu's.

 

I agree but why have i heard the obd-I's gain something like 10 more hp to the wheels.?<--------i dont know

Have you heard that before?

 

at least I'm not the only one to have heard that (see my other thread on obd II ecu) .....

h:

 

The claim that OBD-I puts out more power is false. The way the ECU works, it reads the amount of air that is coming into the motor, the RPM and a few other sensor inputs and decides how much fuel to add. Whether it is OBD-I or OBD-II does not matter. The "OBD-I responds to mods better" myth comes from the fact that the OBD-II ECU has a learning capability. All that means is if you manually advance the ignition timing by rotating the distributor, the ECU will eventually figure this out and adjust the timing to what it is programmed to think is the correct value.

OBD-I and OBD-II are diagnostics/emissions control systems. They have nothing to do with the car's ability to put out horsepower. Some forms of ECU tuning only work with OBD-I ECUs because it is harder to chip the OBD-II ECU, i.e. why you had to convert to an OBD-I harness when you got a skunk2 ECU. But this is tuning, and has nothing to do with the performance capability of the stock OBD-II ECU being less than the stock OBD-I ECU. Also, it is perfectly simple to tune an OBD-II ECU with something like a V-AFC or to replace it with an AEM EMS which plugs directly into the OBD-II harness.

 

There are some places that tune 96-98 OBDII also.