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will meth injection make your car smoke


15+ Year Contributor
Aug 4, 2006
Syracuse, New_York
Curious what other people will say about this.

I have read that it should not change anything if properly set up. But I have a little bit of white smoke at full boost at higher RPM when using meth (50/50), and no smoke without it. Maybe it's carbon deposits burning off or something...


15+ Year Contributor
Mar 13, 2004
Carmel, New_York
i run 50 50 and don't see any smoke . if set up properly you shouldn't see any .


Proven Member
Jan 7, 2010
Pasco, Washington
Water/meth will drop your air/fuel ratios down because 50/50 mix will still burn but when methanol burns it does not smoke. Check to make sure your air/fuel ratios are where they need to be, I shot for 11.5

I run 4-315cc meth nozzles, 1 in each runner of the intake manifold. At full boost (30+psi) if I was to turn off water/meth my air/fuel ratios will go up from 11.5 to about 12.2-12.5. I have never seen my car smoke black at high rpms unless my air/fuel ratios drop in to low to mid 10s
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