Gsr swap ecu help
01-31-2014, 03:02 PM
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Gsr swap ecu help
Hi honda-tech I am a new member on here and I recently just bought my first Honda. A 1991 CRX Si with a gsr b16a swap. It has been converted from obd0 to obd1 and when I bought it the guy gave me a p28 and said he had a p30 on it but to run 100% it would need the p28 but he said something about a basemap and being new to this I am quite confused. Now don't get me wrong I know my way around a set of wrenches but like I said I'm new to the honda's. I am not driving the car yet so while it's off the road I want to get the ecu all sorted out so I don't damage my new car. My questions, what difference do the ecu's make? Will any p28 work? Just trying to get some info
01-31-2014, 03:22 PM
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Re: Gsr swap ecu help
You have a B16A which is not a GSR B18C.
It is very common to put different fuel and ignition maps on a chipped ECU. This is how tuning is performed.
The P28 is perfectly suitable to run a B16A map. If you actually had a B18C GSR motor, then your motor would have unique solenoid on it that the ECU would control (the IAB if you care to look it up). The P28 does not have the electrical hardware to control the IAB, however it is not unheard of to add the electronic components to the P28 to make it work. Again, a chipped ECU would be required with GSR maps.
The term basemap is often used incorrectly. Properly defined, it is maps for a chipped ECU that contain fuel and ignition tables that allow the engine to -at the minimum- be started and driven on and off a trailer for the delivery to get a proper tune. a basemap isn't designed to be extend into normal driving.
Used incorrectly, people call the stock OEM mapping 'basemap'. So if you take the stock mapping from a B16A ECU and load that on to a P28, the term 'basemap' would incorrectly, but often so, be used. Properly, one would just say it's a P28 with B16A maps.... never saying basemap.
It is very common to put different fuel and ignition maps on a chipped ECU. This is how tuning is performed.
The P28 is perfectly suitable to run a B16A map. If you actually had a B18C GSR motor, then your motor would have unique solenoid on it that the ECU would control (the IAB if you care to look it up). The P28 does not have the electrical hardware to control the IAB, however it is not unheard of to add the electronic components to the P28 to make it work. Again, a chipped ECU would be required with GSR maps.
The term basemap is often used incorrectly. Properly defined, it is maps for a chipped ECU that contain fuel and ignition tables that allow the engine to -at the minimum- be started and driven on and off a trailer for the delivery to get a proper tune. a basemap isn't designed to be extend into normal driving.
Used incorrectly, people call the stock OEM mapping 'basemap'. So if you take the stock mapping from a B16A ECU and load that on to a P28, the term 'basemap' would incorrectly, but often so, be used. Properly, one would just say it's a P28 with B16A maps.... never saying basemap.
02-01-2014, 10:08 AM
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Re: Gsr swap ecu help
The guy I bought the car from gave me a p28 with it. How can I tell if it is an obd1 ecu and for a manual? And after I get that is it just plug and play so to speak?
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