I did a quick search but couldn't find a deffinite answer.
I know that when you put in a larger fuel pump your fuel pressure will rise and if you have a standalone and don't change your settings then your AFR will raise.
If I change out the stock fuel pump on a bolt on S, will the stock ecu compensate for the higher fuel pressure.
I run my AEM ECU around most of the time but I like the flexibility of swapping back to stock for diagnostic reasons when I have a problem. That way I have a baseline for the problem I'm trying to fix.

 

I am running a stock ECU and the 255 pump. No issues and the car runs great. It is too much of a pain to swap it back out. also many CompTect S/C owners leave it in place when they sell the kits.

 

The stock FPR regulates the pump output. As Stratocaster stated, many a SC'd car has had the SC removed, except for the fuel pump. No problems running the 255lph pump on a stock car. No performance gained either.

 

Good to know. I had a 255 on another honda and it wouldn't idle right. Problem was the fuel return orifice in the fuel pressure regulator (FPR) was too small so, even with the FPR fully open the idle fuel pressure wouldn't settle down to stock. That's why AEM FPR's come with different orifice sizes so, you can compensate for a big pump.

 

Allright Great to know. Many first thoughts were that it would be controlled correctly but I wanted to double check so I didn't get myself into trouble.

Thanks guys.