sweet, I just read on a post there is some type of windsheild washer fluid (peak) that is trhe perfect mixture, is this for real?

 

I'm running about 4 degrees more timing across the board, and 10psi boost.
My MAX intake charge temp is 91F with the spray on. I've got a very small (meaning very fast response) thermocouple in the intake manifold. I've run with the spray off also - AFR is 12:1. I did feel the ECU pull timing on a hot day with the spray off - just like its suppose to. AFR is 10:7.1 with the spray on. Getting ready to pull the Shurflo pump and put in an Ulka 200 psi ($62).

Lots of sources mention that each 1 degree of charge cooling equates to 1% power increase possible, assuming you tune for it. Banks (of BanksPower) claims the number is more like 1.8% power per 1 degree charge cooling. Of course there are practical limits to it. Anyways a good WI system with failsafes seems like a good bang for the buck. IMO its actually safer than not having it - assuming you don't get ignant with the tune and boost level.

 

My main question would be if there are fail-safe measures to prevent detonation if the unit fails, are the adjustments (pulling timing, etc.) based on intake temp readings, or the output of the meth unit (unit sends signal to EMS, telling it that it is on and functioning)? If it does it based on whether the unit is "on" or "off" as opposed to threshold parameters on a result (intake temp) of the operation of the unit, it still may screw the engine if the controller unit still functions, but fails for some other reason (out of meth, leak, clogged sprayer, etc.).

I am not sure how the fail-safe's work. As long as the car is tuned to run without it, it should be fine, but then you are talking about not tuning for that 1.8% you could possibly gain by the cooler charge temp...

S2Kart - How did your AFR go down with the meth working? I would think it would be the opposite (cooler air, plus water = more oxygen. More oxygen + same injector duty cycle + more timing = more lean mixture). I know it is injecting some methanol, but I did not think it was that much when compared to the water component (% wise) of the mixture. Assuming your ECU is pulling timing when the meth is not running, that would result in less fuel being burned, and a more rich mixture being pulled out the exhaust... This is just thinking about theory.... I have very little experience with meth injection, personally...

John

 

Wow !!!!!!!!!!!!!!!!!! Very good but that's way too much information I don't know where to start.

 

Does this mean on very cold days (30F), will my tune be out of whack and my car run very lean? or does the car adjust for change in Temp

 

kits such as aquamist have great failsafes.

mine is going to be setup thru a boost solenoid and will cut boost to 5psi if unit fails.

plus with the dds3 gauge I can monitor the flow accurately and quickly.

like s2kart said, if the unit doesn't fail your motor is actually safer than w/o it.

according to my tuner (Jon@hbspeed) you can run leaner on the map, say 12.5 but actually be at 11 because of the added timing you can pull with the meth.

anyways, i'm merely trying to relay to you guys what he said, so i could be wrong.



i'm not preaching that meth is the best thing ever, but i do agree it is a decent mod for the greddy kit. i'll post up results when my car is done.

 

http://forums.evolutionm.net/showthread.php?t=239124

Aquamist failsafe.

 

Im definitely going to order something up for my car..

Just an FYI, the boost solenoid fail safe will only cut boost back to the spring wastegate psi, which in my car gets up to around 9PSI in VTEC... I will not be able to lower boost below that. Most of these failsafes were designed for people running higher boost levels (eg: an evo running 25 lbs of boost rather than a greddy kit that creeps to ten on the original wastegate spring)

I have yet to really see an effective fail safe besides the ones that pulls timing, but I have my doubts on those with the piggy back E manage Ultimate also.

 

Limiting the boost if it fails is a good thing, but it does not change the AFR up to when the boost is limited... if you are WOT, and say you hit 5psi at around 3500RPM, and the unit fails, you will be running an AFR that is tuned for meth injection until the boost is limited (at which point the injectors probably keep dumping fuel on their rising pressure fuel map, this coupled with the releasing of the boost should lead to a safe mixture). I would be worried up until the point at which the safety measures come in... Also, this does not say anything about whether these countermeasures are implemented when the "unit dies" signal-wise vs. when the EMS detects that it is "not working" by certain engine vitals leaving preset parameters.

WindchaserS2k - Do you know if the "flow rate" the unit tracks is a true "flow rate" and not just an injection rate? I am wondering if it can tell when its "out" of methanol mix (or if something clogs or something, but the unit is still on and "functioning")...

Thanks!

John

 

93 fuel is already at about 4 bucks spend the extra buck and get some vp 100 if its not going to be your daily