M2, Pettit, G-Force, RP programmed ECUs are all tuned for 14.7psi ~1bar. So if you are running anything less than 14.7 you will be running rich. My question is that do you run rich all the time or just when you are under boost?

 

Well you will always run rich with these preprogram ecu because they are not fine tune for your particular engine and mods. They are tuned to support 1bar meaning you can run up to 1 bar. If you run 10psi it'll compensate the fuel required for 10psi not 14.7psi. Hope this makes sense.

 

just get a PowerFC and get on wideband/lambda and it will solve all your problems. All cars and turbo setups are different, if you wanna get the max out of your car safely, get on a lambda meter with a tuneable ecu

 

Anyone with a tuned ECU(pettit, M2,...) and a wide band air-fuel meter, please tell me you air-fuel ratios? At idle, cruising (2500-3500 rpm) and WOT? This info will really help

Thanks for the replies

 

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Not true, the reprogrammed maps only come into play when you're running open loop. In closed-loop mode (cruise, very light throttle) or idle you shouldn't be significantly more or less rich than stock.

jds

 

^^

 

I doubt anyone has any real A/F info with a reprogrammed ECU. Since you can't tune them yourself, people usually don't care.

Here's my suggestion: If the A/F mixture is THAT important to you, get a standalone unit like the PFC, Haltech, AEM, etc...