tommix wrote:It's old topic but why create new one when there is already one.
All i wanted to say that people looks like dont understand AFR maps. They called Smoke Limiting maps because it's a LIMITING maps.

You can alter smoke map table and put AFR of 1 (not lambda 1 but afr) and car will be able to not smoke.
AFR of 17 is stupid idea based on nothing. I do have Alfa romeo 159, previously had Alfa 156 2.4 129Kw. 156 AFR table on average was 15. 159 alfa have higher afr average of ~ 17. And it's because of 159 have dpf. And also drives like slow sluggish tank compared to 156 2.4 alfa.

Any tuner have to ask themselves or client - how fast you want to inject high amount of fuel. If you want to tune car so it will be sluggish - good use high afr of 18 and higher. This just will make ecu to lower IQ while waiting on AIR. THAT'S IT. that's the solo purpose of AFR table. If you have enough air more then needed - AFR table is not used... because there is nothing to limit.

So to summarize - a little bit of smoke when you flooring - is normal. Its hard to tune stock car to feel more responsive without allowing to inject more fuel quicker, and more fuel requires more air, but what if there is no air at that moment? so need to lower AFR. And after some seconds car will have plenty of air so no smoke.

When people say - higher AFR = better economy -yes, because you just wont be able to inject more fuel at lower rpm quick enough.
Bad tunes s when car at highest load have shitty afr and car smokes continuously. Usually it's not because of AFR but because of idiots altering Injection times to be able to inject more fuel and car dont even realize the addition of fuel. All my seen cars in stock maps have afr less then 14, some less then 13 in low rpm. It's normal if you want responsive car.