Best AF Ratio for S5 Turbo....
#1
- Make Haste -
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Location: Calgary, Alberta
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Best AF Ratio for S5 Turbo....
Like the thread name says, whats the best AF ratio to have on an S5 Turbo....
I'm more concerned with reliability then performance.... i dont want to take the risk of leaning out....
Mods:
- S4 Block with S5 Externals
- 3" Racing Beat Turbo-Back Exhaust
- Blitz SS BOV
- Coilovers ( Tein rear, Ground Control front )
- Centerforce Dual-Friction clutch
- HKS PFC F-Con
- HKS GCC
- Knights Turbo-Timer
- Knights FCD
- FD Flywheel
- JDM Brake Balancer
- Stainless-Steel Braded Brake Lines
- Autometer boost and A/F guages
- MazdaSpeed steering wheel
- MazdaSpeed racing pedels
- Manaray 6spoke 16" rims
- K&N Filter on 3Inch TID
- Yokohama AVS ES100 Z-Rated rubber
- Greddy ProfecB SpecII Boost controller
- Walbro 255lph Fuel Pump
- SAFC-II ( Need Install )
- Greddy Vspec FMIC
- MSD 8.5cm Race-Wires
- Megan Strut-Tower Bar
- Denso 720cc Secondary's
http://www.cardomain.com/ride/828726
thanx....
I'm more concerned with reliability then performance.... i dont want to take the risk of leaning out....
Mods:
- S4 Block with S5 Externals
- 3" Racing Beat Turbo-Back Exhaust
- Blitz SS BOV
- Coilovers ( Tein rear, Ground Control front )
- Centerforce Dual-Friction clutch
- HKS PFC F-Con
- HKS GCC
- Knights Turbo-Timer
- Knights FCD
- FD Flywheel
- JDM Brake Balancer
- Stainless-Steel Braded Brake Lines
- Autometer boost and A/F guages
- MazdaSpeed steering wheel
- MazdaSpeed racing pedels
- Manaray 6spoke 16" rims
- K&N Filter on 3Inch TID
- Yokohama AVS ES100 Z-Rated rubber
- Greddy ProfecB SpecII Boost controller
- Walbro 255lph Fuel Pump
- SAFC-II ( Need Install )
- Greddy Vspec FMIC
- MSD 8.5cm Race-Wires
- Megan Strut-Tower Bar
- Denso 720cc Secondary's
http://www.cardomain.com/ride/828726
thanx....
#3
Ready to Rock
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We need more info - i.e. how much boost you're planning to run, etc.
I'll assume you're running 12 psi on the stock turbo, in which case mid to low 11s would be safe.
I'll assume you're running 12 psi on the stock turbo, in which case mid to low 11s would be safe.
#4
Locust of the apocalypse
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Location: Directly above the center of the earth (York, PA)
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on 93 Octane.... and a good intercooler (intakes BELOW 125 degrees at full boost)
5" vac to 0....... 13.5
From 0-5 PSI... 12.5
From 5-10 PSI... 12.0
10-15 PSI..... 11.75
Thats where my schnitz been dialed in for the past year... no complaints..... no blammo!!!
In my experience.. Power drops of DRAMATICALLY the lower into the 11's you go.... so invest in a good IC!!!! (edit) if appears you have one!!!!!!!
5" vac to 0....... 13.5
From 0-5 PSI... 12.5
From 5-10 PSI... 12.0
10-15 PSI..... 11.75
Thats where my schnitz been dialed in for the past year... no complaints..... no blammo!!!
In my experience.. Power drops of DRAMATICALLY the lower into the 11's you go.... so invest in a good IC!!!! (edit) if appears you have one!!!!!!!
#5
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Originally Posted by YearsOfDecay
In my experience.. Power drops of DRAMATICALLY the lower into the 11's you go.... so invest in a good IC!!!! (edit) if appears you have one!!!!!!!
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#8
- Make Haste -
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heeeeeeelllllllll no, i want to make sure this thing doesent crater on me from leaning out!...
yep i definitly got a good intercooler....
i will be running approx 10-12psi on stock turbo for now....
yep i definitly got a good intercooler....
i will be running approx 10-12psi on stock turbo for now....
#10
- Make Haste -
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Although i will be waking the dead, ( somewhat literally ) i just wanted to confirm which AF mixture would be best suited for my setup....
i will be running 13-14psi on a stock S5 turbo with the mods above, i'm tuning with an FCON and GCC on a mustang dyno that reads the AF through a probe in the exhaust, and i was thinking of tuning @ 11.5:1 on boost on 91octane and run 94octane daily, i say that because i may not have 94octane in some places if i decide to go to edmonton and medicine hat to race....
i will be running 13-14psi on a stock S5 turbo with the mods above, i'm tuning with an FCON and GCC on a mustang dyno that reads the AF through a probe in the exhaust, and i was thinking of tuning @ 11.5:1 on boost on 91octane and run 94octane daily, i say that because i may not have 94octane in some places if i decide to go to edmonton and medicine hat to race....
Last edited by Archangels; 03-30-06 at 01:13 PM.
#14
Rotor Head Extreme
iTrader: (8)
Hmm with the A/F ratios I'm seeing in this thread, it's no wonder people keep blowing engines here. Some of you guys aren't leaving enough margin for error in case of slight fuel starvation. With your A/F ratios in the miid to high 11's at say 15psi on 93 octane, just imagine how lean you will really get once your secondary injectors start to clog (and they will without you even knowing it). Guys just remember, a perfect tune can't always prevent detonation from happening from some other cause.
Personally I would run no higher than 11s at 15psi on 93 which is safer.
Personally I would run no higher than 11s at 15psi on 93 which is safer.
#15
- Make Haste -
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i'll be tuning on a dyno and nothing else, i was wondering where in the 11's would be safest....
i have brand new injectors and the works....
are mid 11's alright for 13psi on 91octane gas?...
i have brand new injectors and the works....
are mid 11's alright for 13psi on 91octane gas?...
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