DSMConvert
AWD...say Bye Bye
- :
- Titanium MS6
Ok the following was a response I posted up on the other forum to questions about power loss, cold weather, and CAIs...I can't figure out a way to put the link in here without getting in trouble/displaying correctly so I'm just going to paste my response and if you want background you'll have to go over there and find the original post thread, but none the less I think its very important info for everyone to know about:
I figure I'd chime in here a little since I've actually done the testing...The CAI does indeed make the car run leaner...when we were designing our afc for the ms6(mods let me know if I need to edit this statement I was just attempting to give background not pitch a sale), we ran dyno air/fuel values and the cai(if memory serves me right it was a fujita) leaned out the ratios by between 1-2 points over the stock intake setup @ 65 degree temps. At normal temps(50+F) this isn't that big of a deal, but at much colder temps this raises issues with the ecu. Hehe ok the next part is a little long but explains why people in colder temps you may feel a power loss:
Ok from the factory the mazda ecu has some severe issues, namely a big problem with a/f ratios...however if you dig into it you'll notice a very aggressive timing map...if you attempt to adjust a/f values to a "pretty" curve you'll get pinging, which is why mazda made these things run so rich(this isn't to say there can't be an improvement from adjusting the a/f curve, just that if you want it perfect you must address the timing issue). To prevent pinging from the crappy timing map they dump in a ton of fuel to cover. So with a CAI and very cold temps you're ecu is seeing a TON of air coming through, and dumps a TON of fuel in response, which is partially the reason some of you feel a loss of power in really cold temps with the cai.
My professional advice would be that if your seeing temps below 40ish on a daily basis I'd swap back to the stock box and do the airhorn/resonator removal mod with a drop in K&N filter. This is of course if you have the stock ecu...if you're running the cpe/xede/ect piggy back setups you should have no issue running the cai.
CPE team: you guys have shown very thorough and honest research so if you'd like to chim in feel free to do so. I wasn't sure if you all have done cold weather testing....
I figure I'd chime in here a little since I've actually done the testing...The CAI does indeed make the car run leaner...when we were designing our afc for the ms6(mods let me know if I need to edit this statement I was just attempting to give background not pitch a sale), we ran dyno air/fuel values and the cai(if memory serves me right it was a fujita) leaned out the ratios by between 1-2 points over the stock intake setup @ 65 degree temps. At normal temps(50+F) this isn't that big of a deal, but at much colder temps this raises issues with the ecu. Hehe ok the next part is a little long but explains why people in colder temps you may feel a power loss:
Ok from the factory the mazda ecu has some severe issues, namely a big problem with a/f ratios...however if you dig into it you'll notice a very aggressive timing map...if you attempt to adjust a/f values to a "pretty" curve you'll get pinging, which is why mazda made these things run so rich(this isn't to say there can't be an improvement from adjusting the a/f curve, just that if you want it perfect you must address the timing issue). To prevent pinging from the crappy timing map they dump in a ton of fuel to cover. So with a CAI and very cold temps you're ecu is seeing a TON of air coming through, and dumps a TON of fuel in response, which is partially the reason some of you feel a loss of power in really cold temps with the cai.
My professional advice would be that if your seeing temps below 40ish on a daily basis I'd swap back to the stock box and do the airhorn/resonator removal mod with a drop in K&N filter. This is of course if you have the stock ecu...if you're running the cpe/xede/ect piggy back setups you should have no issue running the cai.
CPE team: you guys have shown very thorough and honest research so if you'd like to chim in feel free to do so. I wasn't sure if you all have done cold weather testing....
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