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Old 01-21-2008, 07:18 PM   #1
kalescustom
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Default tuning with meth newb questions

i just purchased my 1st meth injection kit.. i just had a couple of questions about tuning with the meth...

what afr's should i be running at full boost?

does the high oxygen content of the meth throw off the o2 sensor readings? ...

i know the more water to meth i run the cooler it will be, but how does that change the afr you can run safetly?

share your theory's on the subject...thanks
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Old 01-21-2008, 09:34 PM   #2
Ultimate Collision Center
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afr's range quite a bit depending on the tuning style and the car's setup...do you have any logs?
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Old 01-22-2008, 12:19 AM   #3
a6n6d6y
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Quote:
Originally Posted by kalescustom View Post
i just purchased my 1st meth injection kit.. i just had a couple of questions about tuning with the meth...

what afr's should i be running at full boost?

does the high oxygen content of the meth throw off the o2 sensor readings? ...

i know the more water to meth i run the cooler it will be, but how does that change the afr you can run safetly?

share your theory's on the subject...thanks

what afr's should i be running at full boost?

thats a personal preference far as safety goes but you can run a lot leaner than fuel alone I'd say .5 to 1 point leaner

does the high oxygen content of the meth throw off the o2 sensor readings? ...

no ,but it takes a lot more methanol than gasoline to get to a given lambda reading

i know the more water to meth i run the cooler it will be, but how does that change the afr you can run safetly?


my theory says that depends on out side air temperature
I run strait methanol in winter (less than 50f) as weather warms i add water up about 50/50 in summer

I let the afr go rich with the strait methanol (haven't logged in while can't remember specifics)and let the water take it lean in summer
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Old 01-22-2008, 08:12 AM   #4
kalescustom
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i do not have an logs yet... i am pretty much wondering what to expect...
im guessing as soon as i hook it up and go for a cruise, once i hit the selected boost pressure, my afr's will drop below 10's... so to be on the safeside, i will lean it back till i am right below 12 under full boost...

when is the best time to begin injecting... while boost is ramping up? just before peak boost?
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Old 01-22-2008, 08:26 AM   #5
akira02rex
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anywhere from 7psi to 12psi.
I think I'm going for 10psi.
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