Help me with my Meth issue
You can't take a swamp cooler and crank up the water it is spraying in the air or you'll just wind up soaking wet. Same with an engine, you might spray a 1000cc nozzle of 50/50 into the air but most of the water doesn't vaporize.
Its easy to test on the dyno or on the track or even the street. The GN guys figured it out a long time ago.
Im really not trying to argue...Ive had a lot of problems with spraying too much water in the past and thought it was valve springs, pushrods flexing, plug gap, etc, and as soon as replacing the water with more methanol it was fixed.
Thread Starter
Joined: Nov 2008
Posts: 2,423
Likes: 225
From: A-Town, Ill side
So after listening to everyone, I'm curious where everyone is located, and how much the humidity in the atmosphere, would affect the amount of % of spray. Has any of you guys sprayed say 50/50 on one pass vs 100% meth the next?
The OP has fallen into a newby trap that we are all familiar with. ONLY CHANGE 1 THING AT A TIME. Nail down the tune off meth, then dial it in with the meth. Don't chase your tail trying to do everything at once. When you get the initial tune dialed in, it will be much easier to see what to do with an added meth kit.
Thread Starter
Joined: Nov 2008
Posts: 2,423
Likes: 225
From: A-Town, Ill side
The OP has fallen into a newby trap that we are all familiar with. ONLY CHANGE 1 THING AT A TIME. Nail down the tune off meth, then dial it in with the meth. Don't chase your tail trying to do everything at once. When you get the initial tune dialed in, it will be much easier to see what to do with an added meth kit.
I run a mix of water/meth. It's called windshield washer fluid 😂. Works great, no bog with a simple boost switch to trigger it. But starting at 3 psi is too low, especially on a centrifugal car. Set the threshold to something like 7 or 8 psi and I bet the bog goes away if you're tune is close. Also tuning for 10.5 AFR PLUS the water/meth is asking for a big. Too much fuel/liquid. Since you don't have an FMIC, your only choice is to lean out the AFR without the meth and let it bring your AFr back to the target.
TECH Regular
Joined: Nov 2018
Posts: 467
Likes: 116
But ya you can't tune high boost without the spray if it requires the spray to get there in the first place. You can only pull so much timing until you lose max RPMs from it. A lot of people are just running "insurance water/meth injection" and in those cases they would tune the whole map without it. I run at about 27psi and I most certainly have to tune it all with the spray on. It can never really run without it unless you count just not giving more than 10% throttle.
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Verdad Gallardo You tune it the same as every other tune. the only difference is that you know in advance that you will have to fatten it up and kill timing. You want to know these things for when your meth injection fails. Once you dial in these limits, you know what to fall back to if a squirrel chews through your meth pump wiring.
