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I've only had it in for a couple days so no longer term observations yet. It seems to be running pretty much the same as it was. Chipping and tuning $s are in the future though

The USDM ECU fits in after removing a bracket that appears to be there for the JDM ECU. All done with this part of the project for now

A follow up on this topic, does anyone know if the small differences in the HP and torque specs between the JDM B18B and the USDM B18B1(?) are influenced at all by whether the ECU is a JDM ECU or a USDM ECU? I understand that the engine compression ratio is a matter of physics but some other...

So I've received and installed a USDM P75-A01 ECU and that seems to be working fine. Thanks for the input, now I just have to figure out how to nicely fit this USDM unit in the space that seems more suited for the P54 JDM ECU size

Based on your threads you've been through some of this stuff, that 92 Si is sweet looking. Do you have experience with a source for ECUs that you'd recommend. I've got a little to spend but not a lot and I've been looking around on Ebay.

Yeah, I've noticed that the P75 is frequently mentioned in relation to the motor I have. I guess I'm just a little gun-shy about paying for a different ECU model than what's there even though it appears the one I have is already modified. The issue I've got with this one is that two of the...

here's a pic of the whole ECU, is it "chipped" ? And if it is chipped would that mean that a m/t (000 or J00) version would work equally well?

Apparently it can, I've got no reason the think the ECU is anything other than what the tag indicates and based on the info found here https://hondaswap.com/threads/honda-ecu-list.29129/

A couple years ago I bought a 1996 Civic DX (6th Gen) with a JDM B18B non-vtec that looks to be maybe 1994-ish, and an SC4, 5-speed trans. I've been using it as a daily driver and it's been doing well in what appears to be a basically stock configuration. The ECU it came with is 37820-P54-900...