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meth AFR's - whats good?
Hi Guys,
ok I am finally getting close with my tune: https://img217.imageshack.us/img217/8850/201004121.png What I want to know is what is a good AFR to shoot for when running 50/50 meth/water? 11.5 on gas? leaner? Cheers D. |
You will be ok shooting for 12.0 afr. Some like to push it closer to 12.5 but in that range with WI injection you should be good. I run about 12.5-12.0 during spool up and 12.0 toward redline. I have small leak so I have been having a hard time pinning my afrs down.
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is there much power gain in going for 12:1 over 11.5:1?
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What pump gas are you running. On 91 Oct and 50/50 i try to hit around 11.5.
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Originally Posted by tephra
(Post 8194443)
is there much power gain in going for 12:1 over 11.5:1?
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Originally Posted by TheBoz
(Post 8195889)
What pump gas are you running. On 91 Oct and 50/50 i try to hit around 11.5.
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Originally Posted by PeteyTurbo@KHC
(Post 8195930)
you will see about 10-15hp. ..What % of meth/water to gasoline are you running?
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If you are road racing it would be better to stay on the rich side so 11.5 to 12.0. I like to go drag racing so I keep mine a little leaner. I also see a few local evo X pushing 30psi on the stock turbo with WI.
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I'd second that, 11.5 to 12.0, 11.8 to shoot for a number. Make sure you are getting full load on the motor otherwise it will run leaner when pushed.
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On our California 91 octane and a 50/50 mix, I'm at 12.0.
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12.0 should be a nice number for you. If you were running a more aggressive mix i would say go leaner. See if your car prefers timing vs removed fuel. Obviously you want to get away with more timing for power and lower egt's.
When does your meth hit hard? 3000rpm? 4000?... Just another thing. See how the car feels at 11.6-.7:1 a/f vs 12.0-.1:1 af. Depending on your approach one may feel better than the other. |
i'm doing around 12.5's just with water on stock turbo & ic on aem kit starts spraying @7psi and max flow & 27psi of boost. i think my car likes lean afr's or should i bring the afr back up to 12's ?
as for timings, mine is quite similiar to tephra's except boost curve cos still waiting for 3port. |
be careful :)
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Just out of curiosity what size jets are people running with methanol? Im currently running an m10 snow performance jet.
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2x 0.6mm jets
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