Quote:
Originally Posted by ricekikr
I understand the benefit of 50/50 at lower boost. But how come most people still run 50/50 when boosting 25+psi (I assume this is high boost)?
I have a 97 Audi 1.8t, currently boosting it 20psi stock block. I'm gona be building up the block in the next couple of months and plan on water or w/m injection and increasing boost to 25+ (probably around 30psi).
I'm really confused because most people use 50/50 and make power, never seen anyone use pure water, even though it costs less, should make more power, enables us to run shit loads of timing/boost and actually use less gasoline.
Questions:
1. So which will produce more HP? Pure water or 50w/50m or pure meth?
2. Why even use meth when pure water (from what I read) has a lot more benefit? 
TIA  |
It comes down to simple power production capability.
I have developed cars with both *water* and *WM50/50*
In short WM50/50 makes more power and is not as sensitive to low ignition power and allows you to use more conventional AFR settings most tuners are comforatble with.
Water works well, but on like settings makes less power (read my member rides thread for detailed discussion of different settings on my car and proof). To get water to perform at its highest levels you need to have a very high capaicty ignition in a high speed engine, and also you need to have much less fuel going through the engine, otherwise you will notice a power loss on fixed settings (like timing, boost, rpm etc).
This is well documented.
WM50/50 is the best I have found, it's window of tuning is more convential, and the power you make simply can't be ignored either, this is the main reason why I use it.
I have gone through this same situation many times repeated with a few drag racing customers who are running leaded VP Racing C16 fuel, and the results have been the same as I found testing in my own road car (which I used to verify their own feedback to me). WM50/50 will do the main job you want of improving the turbo efficiency, reduce the charge temperature, eliminate all knock in the engine, allow conventional settings of the engine managment (spark and fueling) + give you maximum power results which will translate to real world time improvments and higher velocities in whatever you are using the car for, road racing, drag racing, dyno sheet racing !
Hope this helps a bit?
http://www.aquamist.co.uk/vbulletin/...?t=1590&page=3 My own information and testing from page 3 inclusive, there is allot of information, but it all points to more power
as what got me originally to test this myself after some prompting from my end users (after basically the same questioning as you have made)
p.s. In my own opinion I feel the mixture of the chemically combined WM50/50 lets the water do it's job and more of it is being utilized, in itsself the amount of M you are adding is trivial in the scheme of things on convential ratios of injection, it seems to me to make the water work (I.E. vaporize easier) the charge air temperature difference is where the extra density comes from (more air inhaled despite the injection of this additional fluid) and the cooler running is noticeable in all area's. When you hear a water injected car (water or WM50/50) running well nothing sounds like it! they have a certain note to them that is hard to describe, maybe its just eh sound of brute power? but you can hear and feel the power, they are unreal...... to get them to deliver perfectly, they do need fine calibration and indiviual tuning, once you find the sweet spot though you will know it and will never run your car without it. Tuning is the key to making it work perfectly.