AFR in the low 12's
Oct 8, 2007, 08:45 AM
#17
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That is what I thought and have read everywhere. That is why I reflashed it right after seeing this. This was also in 70 degree temps during the day. I do most of my driving at night/early morning and it is in the 30's so I thought that might cause higher afr's.
Oct 8, 2007, 09:02 AM
#18
not that high..the a/f change is affected by how much air your maf see's and how much boost you have running throughout your system. 22psi during the day will probably =22.5-23 at night depending on boost controller altitude/ambient temps etc...trust me your tune is off.
Oct 8, 2007, 04:28 PM
#20
guys, what are you saying?
the whole point is getting power and doing it without knock. If you can get an afr of 12 that does not knock then so much the better. There is nothing magical about 11 or 11.5. Its a matter of fuel and timing getting the peak pressure at a certain point in the crank angle, nothing else.
If the low octane map and the 2nd timing map are correct then he shouldn't have any problem should something go wrong.
Now, if he has given up some power because his afr is 12, and timing is too retarded, then you have a point, but not for the reason that has been expressed so far.
the whole point is getting power and doing it without knock. If you can get an afr of 12 that does not knock then so much the better. There is nothing magical about 11 or 11.5. Its a matter of fuel and timing getting the peak pressure at a certain point in the crank angle, nothing else.
If the low octane map and the 2nd timing map are correct then he shouldn't have any problem should something go wrong.
Now, if he has given up some power because his afr is 12, and timing is too retarded, then you have a point, but not for the reason that has been expressed so far.
Oct 8, 2007, 05:17 PM
#21
ok. The point to tuning around 11.5/11.7 is if he gets a bad tank of gas or something along those lines...if he gets a bad tank of gas at 12.2/.4 will you pay for his new motor?
11.1 = ultra safe
11.5 conservative yet
12.0 = aggressive
Advanced timing has a large roll in the tune too...
I am pretty sure his car pulled real hard with the 12.0+...is it safe? Nope
11.1 = ultra safe
11.5 conservative yet
12.0 = aggressive
Advanced timing has a large roll in the tune too...
I am pretty sure his car pulled real hard with the 12.0+...is it safe? Nope
Oct 8, 2007, 05:34 PM
#22
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If the low octane map and the 2nd timing map are correct then he shouldn't have any problem should something go wrong.
Now, if he has given up some power because his afr is 12, and timing is too retarded, then you have a point, but not for the reason that has been expressed so far.
Now, if he has given up some power because his afr is 12, and timing is too retarded, then you have a point, but not for the reason that has been expressed so far.
I would verify the maps for low octane, if they are generously more conservative, you should be ok. The knock sum = 0 is nice, but if your low octane map isn't much different, as soon as you get some bad gas, you'd be asking for trouble.
Oct 8, 2007, 06:49 PM
#23
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The low octane fuel and timing maps are conservative. The orginal tune was a mail in base map from dynoflash and was running mid 10's and the low octane maps are just a little more conservative. The first base email flash ran 10 flat all the way through the power band. The second one was the one shown with the low octane still being conservative, first thing I checked before doing my 3rd gear pull. The timing maps are quite different.
Oct 9, 2007, 01:44 PM
#26
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what r you talking about 12's are fine everyone is doing it LOL j/k
12's on just pump gas is a little to far IMO. just like C6C6Ch3vo said "it has a slightly higer margin of error" couldnt agree more. but for meth IMO is a different story. In the cooler season I usually tune my car for low 12's across the board with no knock but this is my car w/ a m15 nozzle i tune agressive but safe. but tuning other people's car different story I dont go higher than 11.6 to cover my *** if you know what mean, and if they dont have a wideband to monitor there afr's i go to lower a 11 just case for weather changes, bad tank of gas, etc.
12's on just pump gas is a little to far IMO. just like C6C6Ch3vo said "it has a slightly higer margin of error" couldnt agree more. but for meth IMO is a different story. In the cooler season I usually tune my car for low 12's across the board with no knock but this is my car w/ a m15 nozzle i tune agressive but safe. but tuning other people's car different story I dont go higher than 11.6 to cover my *** if you know what mean, and if they dont have a wideband to monitor there afr's i go to lower a 11 just case for weather changes, bad tank of gas, etc.
Last edited by bnice01; Oct 9, 2007 at 01:49 PM.
Oct 9, 2007, 09:40 PM
#27
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What gear should I do some pulls in to make sure the tuning is safe through out the gears? It seems that my afr get lower in the higher gears, or maybe it is just 1st and 2nd are higher than 3rd and 4th. 3rd and 4th are a little lower, is this normal?
Oct 9, 2007, 10:59 PM
#30
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^^The latest tune was the same tuner in your sig, email flash so I know it is hard to tune correctly. I couldn't run their tune because it was in the 12's and said it was normal in 2nd and 3rd. So i have my own tune right now.