Do my AFR is right
#1
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Join Date: Mar 2010
Location: Montreal
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Do my AFR is right
I buy the car about two month ago. The garage who sell it to me say it was de-tuned. So i bought a AEM wideband to see how it was tuned
The cars' is running 1 bar from around 3000 rpm to 6000 rpm and 1.35 bar from 6000 to 7500 rpm with an air fuel going from 10 in the low rpm to 11.X in the mid range and it finnaly going somewhere to 12.X in the last 500 rpm.
I am wondering if this is a good or bad tuning...
The mods are:
Fuel pump, Bushur full IC piping and intake, full 3'' catback without cat
The cars' is running 1 bar from around 3000 rpm to 6000 rpm and 1.35 bar from 6000 to 7500 rpm with an air fuel going from 10 in the low rpm to 11.X in the mid range and it finnaly going somewhere to 12.X in the last 500 rpm.
I am wondering if this is a good or bad tuning...
The mods are:
Fuel pump, Bushur full IC piping and intake, full 3'' catback without cat
#7
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iTrader: (2)
Is there any gas that causes the boost to be set stupid, and any gas that runs leaner in higher RPM?
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#9
Evolved Member
iTrader: (27)
Does the OP know what kind of boost control he's using? Sounds like thats more of the problem. But yea horrible tune or something wrong in the setup - get it retuned and checked out.
#12
where in the 12's is it? i mean if its 12.0-12.2 i wouldnt worry too much. but if its anything more then that then thats pretty lean. my car on pump usually is 11.5's until up top then it hits around 12.1 or so.
and remember. variables like humidity and temperature can change numbers pretty drastically. colder = leaner. which usually isnt an issue if your seeing leaner numbers when its colder out.
and remember. variables like humidity and temperature can change numbers pretty drastically. colder = leaner. which usually isnt an issue if your seeing leaner numbers when its colder out.
Last edited by jdm602; May 23, 2010 at 03:22 PM.
#13
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iTrader: (16)
where in the 12's is it? i mean if its 12.0-12.2 i wouldnt worry too much. but if its anything more then that then thats pretty lean. my car on pump usually is 11.5's until up top then it hits around 12.1 or so.
and remember. variables like humidity and temperature can change numbers pretty drastically. colder = leaner. which usually isnt an issue if your seeing leaner numbers when its colder out.
and remember. variables like humidity and temperature can change numbers pretty drastically. colder = leaner. which usually isnt an issue if your seeing leaner numbers when its colder out.
you can get away with it with race gas, but not pump.
and the temperature shouldnt play a role in your AFR's. my wideband reads the same AFR's in summer as it does in winter. same with the humidty, it doesnt change AFR's.
#14
oh ok. well based on my experience the iat sensor compensation takes a little control and adjusts fuel tables based on the temp. but just because your setup doesn't change afr's...doesnt mean someone elses car wouldnt either. closed loop will change afr based on o2 as well.
doesnt sound like your not even too confident what it should be. :P
and i never said it was perfectly ok to run it "lean" anyway. in all honesty, mid 11's is ideal.
goodluck.
and i never said it was perfectly ok to run it "lean" anyway. in all honesty, mid 11's is ideal.
goodluck.