Hey Guys,

So I'm in the process of tuning my HFS-5 and increasing my knowledge of tuning WAI. I started with a .8mm (750 cc injectors) jet with 100% Distilled H2O. First time on the dyno I was able to lean it out from 10:1 to about 11:1 and add a max of a few degrees of timing. I did not touch boost as I was mainly wanting to take it slow and learn as much as possible along the way. We only had an hour or so to play around with the tuning but with the same boost as my pumpgas map I was able to pickup about 25-30 whp on our uncorrected dynodynamics.

Next tuning session will be with 50/50, Undecided on the jet setup, I will start with 1.0mm and then may move to 2 x 8mm. I plan to see how far I can push it on each setup and get a feel for the pro's and cons.

Just wanted to see how many folks that are approaching or exceeding 25% meth to fuel ratio actually started out with straight H2O or 50/50 and what their experiences were with the various mixes.

 

100% meth is my only choice

 

What was your results on pure water and a 50/50 mix before you went with 100% methanol?

 

I've only ran 100% methanol since I've gotten my meth kit. For those running 50/50 mixes, what are your reasons for doing it?

 

This is always the big debate. There seem to be two camps in the wai world, the 50/50 ers and Drunken 100%ers. Water has more heat absorption capability than the same volulme of meth. Meth has more heat absorption capability and higher octane rating than pump fuel.

Hence the reason for starting this thread, to find out how many folks have tried both and tuned both and to find out what their experiences have been.

 

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And why is that? Not being sarcastic, just trying to understand why people are running the mixes they are running.

 

Snow performance, are you guys out there watching this???

 

I run Denatured Alcohol............

 

With small injection quantities water is best. With large amounts meth is best.
Detonation limits found years ago on a 25G.
22psi 93 octane
25psi water injection.
29+ psi with meth injection.
Tuning stragey changes as well. straight water needs to be leaner, like 12.5-1. Meth will like richer mixures. like 11.0. When you max a turbo out on meth inj. adding water will just kill power. its not a fuel.

 

I run 50/50 because max horsepower was not my goal (and I didn't want to deal with any potential issues having a big bottle of alcohol sitting behind my kids). I was more interested in having the car running cooler given the silly heat we get around here.

 

I guess that's one more thing that I do wrong. I use water/meth in the OKIX car. Power on Buschur's dyno is record breaking. Power is record setting. It speaks for it's self.

 

isnt the aim to TRY to reach MBT to make maximum power, having the explosive pressure peak @~14 degree after TDC

colder/richer mix requires more timing due to slower combustion and

leaner mix requires less timing b/c combustion is fast

 

Slowcar, your correct. Depends on how the car is tuned (timing, AFR, Boost) as to whether the added water is of benefit, or not. We absolutely see the benefit. But, then again, I've been told I use the wrong tires, (our 1.53's aren't good enough, and out 128mph traps in a IX gear arent' high enough). So, with the wrong tires and the wrong mix, I may as well give up and listen to 94awdcoupe.

 

wow... running 11:1 on meth huh? on abners car we made 20whp by going from 11.3 AFR to 12 AFR. no change in boost or timing, stock turbo. at 11:1 it was misfiring likely due to much meth. also, there really is no point in running so rich with meth because the latent heat is keeping temps down to avoid det. which is the reason we run rich in the first place. if meth is higher octane AND cools the air significantly better, it would be better to run the fuel closer to its highest efficiency. not drowning out the spark.

 

when you were tuning my car with afrs in the 11s...the tail pipe was puffing out intimittant puffs of black smoke, like a indian smoke signal - from misfiring