do i need a P75 or a P28 ecu for OBD1?

**LX-incredible** · 03-09-2010, 02:30 PM

PR4 or P75 will be your best option. They're going to have a basemap closer to the accord than anything else. They also do not look for an ELD, simplifying wiring.

I've been running a stock PR4 for approximately 20K miles. It seems to be a bit lean on the high end, which helps with fuel mileage the way I drive. I do however find it necessary to run midgrade in the summer (temps above about 95º F) to prevent detonation. I do plan to have it tuned, but will most likely keep the PR4 with the stock basemap for everyday driving. I'm not going to post the milage I'm getting, because nobody will believe it anyway... All I'll say is it's quite possible for 40+ mpg on these cars.

***2drSE-i*** · 03-09-2010, 02:32 PM

Any issues with detonation? I still love my sig.

**LX-incredible** · 03-09-2010, 02:43 PM

No, no issues. It was pretty minor, nonexistent with midgrade, or temps below 100.

lol, I've never got quite that high. It's possible with the correct build, weight reduction, and aerodynamics though.

**MessyHonda** · 03-12-2010, 12:41 AM

Originally Posted by Harrison_Bergeron

I've only read the one story, but yes, that is what the s/n is.

Would a stock PR4 like mentioned above at least work for regular street driving? Or driveway racing only?

I guess I will search MessyHonda's posts to see if he did a write up on it.

thanks for serching....the only thing that sucks with the ecus is that every part that i added...i needed to get it retuned....i lost power on some of the mods i did because i didnt retune....car ran good with the pr4 ecu i had...just dont overrev the car...i did couple times because redline is 7200....now i have a msd set up with 6k rev limiter chip....more torque out of my big cam because i have it advanced 2 degrees