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01-21-2008, 07:18 PM | #1 |
Scooby Specialist
Member#: 147598
Join Date: Apr 2007
Location: Colchester, VT
Vehicle:95 Impreza 2dr Black |
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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01-21-2008, 09:34 PM | #2 |
Former Vendor
Member#: 69072
Join Date: Aug 2004
Chapter/Region:
Tri-State
Location: Peekskill
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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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01-22-2008, 12:19 AM | #3 | |
Scooby Specialist
Member#: 123347
Join Date: Aug 2006
Chapter/Region:
NWIC
Location: SEATTLE
Vehicle:1993 POS burgandy legacy |
Quote:
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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01-22-2008, 08:12 AM | #4 |
Scooby Specialist
Member#: 147598
Join Date: Apr 2007
Location: Colchester, VT
Vehicle:95 Impreza 2dr Black |
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? |
01-22-2008, 08:26 AM | #5 |
Scooby Specialist
Member#: 82612
Join Date: Mar 2005
Chapter/Region:
MWSOC
Vehicle:2015 WRX STI Ice Silver Metallic |
anywhere from 7psi to 12psi.
I think I'm going for 10psi. |
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