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Old 09-15-2006, 09:04 PM   #1
kn0bby8
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I know someone who has thier car tuned on 50/50 meth and water. The tuner was not able to make the car as lean as he wanted. Would the meth it self have anything to do with that.

I only ask becasue I am getting my car tuned with meth I got from the same person whos car could't be leaned out enough. Would I be better off just getting some VP Meth?
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Old 09-15-2006, 09:21 PM   #2
hippy
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Imo it probably has nothin to do with the meth.

peace
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Old 09-15-2006, 09:22 PM   #3
kn0bby8
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I am thinking maybe the meth is a bad grade. If it was a better grade it wouls raise the octane of the fuel more and let the tuner lean the car out more. Wouldn't it?
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Old 09-15-2006, 09:50 PM   #4
hippy
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Quote:
Originally Posted by kn0bby8 View Post
I am thinking maybe the meth is a bad grade. If it was a better grade it wouls raise the octane of the fuel more and let the tuner lean the car out more. Wouldn't it?
That depends on many things. Injection and tuning aren't simple, and they often need more then just one thing to work in a certain way for everything to be the way you think it should be. The boost, amount of injection, exhaust, turbo, timing, octane, and other things contribute to how lean an a/f ratio can be run under load without certain bad things happenning. Many(most) adjustable injection systems are setup to run max flow at the highest boost level. This would mean that if ya got max boost at 4000rpm, and ran the same boost til redline, the injection would be constant as the rpms went up. This would make it easier to run leaner a/f ratios and higher boost midrange, while uptop ya might not see as much of a benefit.

What size nozzle was he using, and at what pressure? What are his mods(including car type), and how much boost was he trying to run? Where the problems more uptop?<edit> Forgot to mention that it could have been bad meth(like you said), but I wouldn't be on it.

peace

Last edited by hippy; 09-15-2006 at 09:57 PM.
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Old 09-15-2006, 09:54 PM   #5
kn0bby8
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Quote:
Originally Posted by hippy View Post
That depends on many things. Injection and tuning aren't simple, and they often need more then just one thing to work in a certain way for everything to be the way you think it should be. The boost, amount of injection, exhaust, turbo, timing, octane, and other things contribute to how lean an a/f ratio can be run under load without certain bad things happenning. Many(most) adjustable injection systems are setup to run max flow at the highest boost level. This would mean that if ya got max boost at 4000rpm, and ran the same boost til redline, the injection would be constant as the rpms went up. This would make it easier to run leaner a/f ratios and higher boost midrange, while uptop ya might not see as much of a benefit.

What size nozzle was he using, and at what pressure? What are his mods(including car type), and how much boost was he trying to run? Where the problems more uptop?

peace
I will let him look at this thread and if he wants he will chime in. I just wanted to see if it could be beneficial to get some VP Meth instead of using the meth i got from him.
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