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In looking at few stock dynos the AFRs are in the 10-low 11s range. On my stock G37S when I data logged my AFRs they topped out at 12.28. Any
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04-14-2016, 02:51 PM
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#1 (permalink) |
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Base Member
Join Date: Jan 2016
Location: Ontario
Posts: 230
Drives: G37 Sport
Rep Power: 6720   |
Dynos & AFRs
In looking at few stock dynos the AFRs are in the 10-low 11s range. On my stock G37S when I data logged my AFRs they topped out at 12.28.
Any idea why the huge difference? I would of thought the stock target AFR would be the same and around 12.2 for "safe best power" |
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04-14-2016, 03:15 PM
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#2 (permalink) |
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A True Z Fanatic
 
Join Date: Aug 2011
Location: Cleveland, OH
Age: 69
Posts: 1,830
Drives: 2010 (40th) #706
Rep Power: 16886 |
Could be that Nissan is trying to squeeze every MPG out of these cars. When I had mine dynoed a few years ago (CBE, HFC and Cold Air Intake) mine was in the 12.25 - 13 range, even at wide open throttle with the stock tune.
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mults 40th Anniversary 'Z', 312.06HP/260.58TQ (Dynosty EcuTek Tune) Build Date/Number: 1/27/2010 #706 Berk HFC + CBE, R2C CAI, Clear Bra, Cleveland Z Club |
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04-14-2016, 03:36 PM
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#3 (permalink) |
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Premium Member
Join Date: Jan 2009
Location: North GA
Posts: 6,831
Drives: Twin Turbo Z34
Rep Power: 3682 |
Most guys are running 10-11 AFR when TT and pushing for power...
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Shop Cars: 2013 318whp Nismo VspecII 370z *SOLD*, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054 |
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04-14-2016, 07:10 PM
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#4 (permalink) | |
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Base Member
Join Date: Jan 2016
Location: Ontario
Posts: 230
Drives: G37 Sport
Rep Power: 6720 |
Quote:
I am trying to understand how some stock tunes show up between 10-11 AFR. The only thing I can think of is the wideband O2 used to sniff the exhaust is old or not accurate. FordMuscle Mag did a comparision test and found HALF of the eight wideband sensors tested were out by 1.5-2 points!!! http://www.diyautotune.com/downloads...20Shootout.pdf |
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