Even the kits are prone to have corrosion issues, they often have aluminum screen inside the nozzles which are designed to catch debris, but over time the methanol will actually cause the screen itself to corrode and clog.
I dont doubt that some manufactures have adressed this issue but I know for a fact that this was still happening very recently.
You're misinformed or confused. Most of the clogged nozzle issues over the years have been caused by people using windshield washer fluid that contains glycol or other washing detergents in their meth injection kits. These compounds can build up in fittings and nozzles and lead to clogging. This clogging is NOT due to methanol. Methanol will not clog anything when used with the right components, which every kit manufacturer is and has been using for quite some time (Devil's Own, Snow, Cooling Mist).
Yes, methanol is more volatile than water, this volatility will cause a drop in IAT due to the evaporation phase change, just as water will (to a lesser extent). But the lowering of IATs is only an added benefit, the water acts as an anti-detonate, hindering detonation in the cylinder, during combustion. These anti-detonative properties of water outweigh the effect of methanols higher octane within the same volume.
One has higher volatility, one has better anti-detonative properties, this is why you use a mix.
I thought you weren't supposed to use a mix? Yes, water is great at cooling the charge and at suppressing detonation. Methanol is great at absorbing heat, too. The AFR spike it provides gives additional protection against detonation, too, but again, it depends on each individual setup and all of the variables that go with it. For my own use- which is the exact same as the OPs, by the way- I'm finding the best results so far using 30-40% methanol starting at 3 PSI.
By the way, you act like methanol doesn't have any effect on detonation- it sure does. Even in straight meth form, you're injecting a higher octane fuel (high octane means less prone to detonation) that is going to resist detonation.
You use a mix for a variety of reasons.
Just because a bunch of drag racers allegedly inject pure or high concentrations of methanol is not an argument for anything, neither you nor I know exactly what they are doing with their injection systems or if they actually know that whatever concentration is best. They are mostly just normal people who are just as likely to follow word of mouth wisdom as anybody else.
I know what I'm doing with my own setup, regardless of what other folks are doing with their systems. I'd been doing quite a bit of testing on different combinations of meth/water (and tried ethanol and isopropyl, too).
Without taking up too much space, I tried 10% meth, and found that the car had a bit of stumble when the injection started. This went away with a higher meth content. So far, it seems that ~30-40% methanol seems to work the best at lowering IATs for me without causing a stumble at injection time.
The kit suppliers all recommend a meth/water blend, too- most seem to go with 40-49% meth. Combining my own personal experience with the recommendations of all the big meth injection kit suppliers, I have to conclude that while mostly water may work in some cases, a meth/water blend in more equal amounts seems to work better for me and plenty of others, too.
My advice still stands. By keeping the concentrations low you do not need to adjust the fuel tables, youre eliminating any risk of corrosion on any aluminum components (either in the WI system or in the engine), and it is more than capable of doing what the OP and just about anybody would need.
You can try to nitpick it all you want, but there is thought and understanding behind what I say, even though you seem to assume that Im just going against the status quo for the hell of it.
How many non-intercooled 3Vs have you installed meth injection kits on again?
I'm not worried about aluminum corrosion. I'm not worried about the fattening of my AFR- I compensate for it by adding timing based on IAT (based on the meth injection being present).
So far, so good. We'll see what it does at the track this week. This topic is fresh in mind because I've been thinking about it a lot recently, since I just installed a meth kit after doing a bunch of research.
For the record, intercooling is still better, too.
No inter-cooler
