05-23-2010, 03:40 PM
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#1
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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AFR's?
Hi guys,
anyone share what AFR's they are getting on hard acceleration? Will have my wideband and logger in the car soon and would like dome comparisons. I have a 97 2.5, but happy to hear any results.
Sam
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05-26-2010, 04:44 AM
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#2
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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Anyone? 12.5 under hard acceleration maybe?
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05-26-2010, 06:15 AM
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#3
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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I've tuned for 12.3-12.5s cruise you will see 14.6 as for were in closed loop. I hope this helps you.
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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05-26-2010, 08:54 AM
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#4
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Registered User
Join Date: Apr 2009
Location: SF Bay Area
Posts: 247
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Quote:
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Originally Posted by JAAY
I've tuned for 12.3-12.5s cruise you will see 14.6 as for were in closed loop. I hope this helps you.
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12.3 seems a bit rich for steady cruise in an NA car. Is your fuel economy suffering? I tune motorcycles and generally mid 13's are preferred. Throttle response is good and fuel economy isnt terrible at that range.
The stock target of 14.6-14.7 is good for economy of course but doesnt give the best throttle response. The surging you get at this lean of a ratio is pronounced on a bike, but its harder to feel in a car. I wonder if leaning it out a bit to 13.5-13.7 would help you get some mileage back without sacrificing drivability.
__________________
2003 Cayenne Turbo
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05-26-2010, 10:06 AM
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#5
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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Manolo...
That came across wrong.. The car is tuned for 12.3-12.5 wot. Its at 14.6 cruise. 14.6 is a factory preset or there about. Thanks for the concern though. But I am with you on the numbers.
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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05-27-2010, 04:46 PM
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#6
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Registered User
Join Date: Apr 2009
Location: SF Bay Area
Posts: 247
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I was wondering how you got past the stock closed loop target!!!
I've been thinking of doing something to tune open loop just for ****************s a giggles. Maybe a piggyback device like youre using.
__________________
2003 Cayenne Turbo
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05-27-2010, 05:14 PM
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#7
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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You can't get around the closed loop. I just tne wot
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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06-27-2010, 12:46 AM
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#8
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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Finally got my wideband setup going, seems I am running leaner than expected. Cruise is high 14's low and maybe mid 15's. I have no error codes though, should I be worried?
Sam
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06-27-2010, 03:55 AM
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#9
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Registered User
Join Date: Dec 2006
Location: shoreham, ny
Posts: 1,619
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At cruise that is where it is supposed to be. What are you at on full throttlle in 3 rd?
__________________
996 3.4 engine with 2.7 986 5speed transmission
Ebay Headers, Fabspeed high flow cats, JIC Cross, IPD Plenum, H&R Coilovers, B&M Short Shifter, AEM Uego Gauge Type Analog, Apexi S-AFC Select, 987 air box, Litronics, 2000 Tails and side markers, painted center console, 18" 987 S-Wheels, GT3 Front bumper with splitter.
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07-01-2010, 04:02 PM
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#10
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Registered User
Join Date: Apr 2009
Location: Australia
Posts: 328
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Yep - finally got around to doing a power run and yes, high 12's to low 13's at WOT.
Cheers,
Sam
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