What A/F ratio should i aim for?
Thread Starter
Evolving Member
iTrader: (27)
Joined: Jan 2008
Posts: 196
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From: South Jordan, UT
What A/F ratio should i aim for?
I'm tuned at 11.5afr just wondering if i'm leaving alot on the table?
MODS:
GT3037S turbo
Cosworth M2 cams
B/C valvetrain
ARP head studs
AEM Tru boost 30psi
880cc injectors
255lph walbro
custom air/water intercooler
Snow Performance stage 2 meth kit w/safe injection failsafe, boost by-pass solenoid
3" turbo back no cat
custom 3" intake, builing a 4" intake
ACT 6 puck
ACT streetlite flywheel
Thanks in advance.
MODS:
GT3037S turbo
Cosworth M2 cams
B/C valvetrain
ARP head studs
AEM Tru boost 30psi
880cc injectors
255lph walbro
custom air/water intercooler
Snow Performance stage 2 meth kit w/safe injection failsafe, boost by-pass solenoid
3" turbo back no cat
custom 3" intake, builing a 4" intake
ACT 6 puck
ACT streetlite flywheel
Thanks in advance.
Last edited by Fairclough; Jun 24, 2009 at 10:11 AM.
This should help you a bit...
Read here... https://www.evolutionm.net/forums/ec...er-safety.html
You can set up a few standalones to enrich or lean based on EGT (or timing for that matter) but it requires individual EGT probes to be done properly. Realistically the time you'd spend is only going to find limited results.
91- 11.0 to 11.3 seems to be the best depending on the turbo (larger will run leaner)
92- 11.5-12.0
93- Havent done one in a while but I am assuming the same basic range as 92
E85- 12.0 on a gas wideband. You can make more on a lean tune but if its run at that level for an extended period of time it will raise combustion chamber temps high enough to lead to piston damage.
Hope that helps a little, some of it is versus RPM as well. Changes to enhance VE will affect how tolerant or intolerant a motor is as well.
aaron
91- 11.0 to 11.3 seems to be the best depending on the turbo (larger will run leaner)
92- 11.5-12.0
93- Havent done one in a while but I am assuming the same basic range as 92
E85- 12.0 on a gas wideband. You can make more on a lean tune but if its run at that level for an extended period of time it will raise combustion chamber temps high enough to lead to piston damage.
Hope that helps a little, some of it is versus RPM as well. Changes to enhance VE will affect how tolerant or intolerant a motor is as well.
aaron
Thread Starter
Evolving Member
iTrader: (27)
Joined: Jan 2008
Posts: 196
Likes: 0
From: South Jordan, UT
I know with the air/water intercooler and meth my ONR number is lower, because of the cooler and denser intake charge, I just want a safe, good tune without leaving to much on the table. Thanks again for the info.
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