I put an H23A motor in my daily driver 1st gen CL. It's basically stock aside from a tri-y header and 2.25" exhaust. It's running on an OBD1 P72 w/ Crome and an H22 base map.

I haven't had it tuned yet. From what I understand, Crome can only be tuned by the computer that burned the chip. Is this correct? The shop that sold me the ECU has been busy and hasn't had time to tune it for me. I took the car to a different dyno and had them do a few pulls to see what the graph looks like and to check the a/f ratio.

Would I benefit from having this stock motor properly tuned? I've searched and seen that people with similarly modded H22's put down something like 150whp on the first run and then leave with a tuned motor making 190whp. I wanted to buy a set of Skunk2 Tuner 1's since I had them in my B18C at one point and loved the mid range power. It made 189whp and 129 torque with those cams.

Here's the numbers from the dyno. The a/f stayed between 13 and 13.5. The first pull was the highest at 175whp and 149 torque. This photo is of the 3rd pull. Sorry for the low quality camera phone picture.

 

U r in NC charlotte i c a tune will help b/c every motor likes something different but there will be things that will help wake up this beast. Like a modified h22 plenum larger TB and 3inch free flowing exhaust. And depending on the cams u have in that motor. B/c the h23a's some come with auto cams in them so getting better or stage 1 or 2 cams will help. I have a h23vtec setup with f22 crank rods jdm h22 pistons close to 12 compression and it rips with bolt ons.