I beileve there are a few guys running the APR 100 program with pump gas and WAI without issues. Can't wait to get my WAI setup.
Anyone here running this system with SEM? I'm wondering how aggressive people have pushed the timing envelope. If you're turbocharged, are you using it pre-boost to help spool the turbo better with aggressive timing and the additional fuel nessesary? Can this system even be used this way?
Quote, originally posted by THEERY2.1 » Scott,
Could i run this WAI on my distributer VR6 S/c with 8 psi and be safe using stock fuel and stock software?
You might be able to get away with this. A 75% proportion of methanol could be used for auxiliary fueling just like a second bank of injectors. The 25% of distilled water would make the stock ignition curve more workable. I'd add the Safe Injection failsafe box and a solenoid to purge boost in case of trouble.
Quote, originally posted by WMTJ » Anyone here running this system with SEM? I'm wondering how aggressive people have pushed the timing envelope.
Folks with factory ECUs see their timing retard go to zero. With SEM you could go beyond that. How far you can go would depend on many variables like engine design/spec, boost level, water/alcohol proportions, type of ignition system, etc. There's no one answer to this good question.
Quote » If you're turbocharged, are you using it pre-boost to help spool the turbo better with aggressive timing and the additional fuel nessesary? Can this system even be used this way?
This is a means of enhancing the octane rating of the intake air/fuel charge. The spray is delivered when combustion begins to become uncontrolled. So, just as with race fuel, it's effects are only realized when the engine needs help controlling detonation. A forced induction engine that detonates before boost has serious tuning or mechanical problems. So, this wouldn't be the cure.
With that said, there is a way to actually *add* energy rather than just maximize safe release of existing energy. That is to mix a small amount of nitromethane into the spray solution. Does that sound crazy? I don't expect every dubber to run in that direction immediately, but it does work extremely well and folks will wise up in time.
Fwiw, up until this season most folks were saying that WAI was ridiculous, couldn't work or was unecessary in a superior VW/Audi engine, would cause instant hydrolocking, or was only suitable for Japanese cars. IGNORANCE! Our scene is finally waking up. There's power to unleash and safety to be had!
I installed a WI system on an SRT4 last night. Used a 5gph nozzle a little before the throttle body. This car previously made 402 whp on pump gas running 25 psi from a GT3076R with the ecu pulling 10 degrees of timing. After the install and running 21 psi, the ecu was allowing 29-30 degrees of advance! The car feels much faster with the WI at 21 psi than without at 25. A/f was 11.5:1. This system is just a static system with no flow control. We are going to add a controller and hit the dyno and bring the boost back up to 25 psi. Anyone not running WI is really missing out. I would never build a boosted car without it.
Yes, you can use washer fluid. However, I don't recommend it because the dye can clog the holes in the nozzles over time. Also, washer fluid generally contains only about 20% methanol. You'll want closer to 50% for best cooling, octane improvement, and easier tuning. The better bet is to mix your own or buy the "Boost Juice".
Quote, originally posted by Scott@USRT » Yes, you can use washer fluid. However, I don't recommend it because the dye can clog the holes in the nozzles over time.
make sure that if you are using washer fluid, it doesnt contain any glycol.
I have a question...
I have been researching kits and want to buy one but i have a slight proplem possibly. I want to get a kit and use a MAP controller but do i need a controller with certain voltage capabilities?
I have a 337 with stage 3+ APR if that makes a difference.
Another company has 2 controllers for MAP, a 2 bar and a 3 bar and apparently neither is compatible with my MAP as far as they know.
This poses a problem if i order any kit i am assuming because the controller wont work, correct?
What are my options? i really dont want to run a MAF controller unless its a last resort just incase the MAF craps out.
Quote, originally posted by cvisinho » I want to get a kit and use a MAP controller but do i need a controller with certain voltage capabilities?.. What are my options?
That's an excellent question, Chris. I believe the controllers are all equipped with 3bar sensors. We've never run into a situation where the MAP voltage was maxed out. Snow Performance is closed until after New Years, but I will be happy to confirm the max boost pressure once they return. [IMG]http://**********************/smile/emthup.gif[/IMG]
Quote, originally posted by Scott@USRT » (sigh) What was supposed to be announced yesterday must wait until tomorrow, guys. We're über busy over here. You'll be taken care of! Promise!!!
Unitronic Stage 2 | DSG Stage 1 | Forge DV | Autopilot V2 | 42DD Catch Can | Forge Twintake | Eurojet DP Catless |
Alrighty, it's advice time. As everybody knows, each engine is set up differently, has different detonation characteristics, and thusly needs custom configuration/tuning to achieve maximum output and safety. The first step in WAI tuning is to pick the right spray nozzle flow rate. This previously required a bit of math and advanced tuning knowledge. The good news for our community is that USRT has made this much easier! Determine your optimal water/alcohol flow rate with this nozzle sizing application. This will put you in a ballpark of where you'll finally end up. (Once you get the kit installed and running, you'll need to tweek from there.)
So, here is how it is done in 3 easy steps. In the example below, we calculate the solution for a 400bhp 1.8T engine with 550cc injectors:
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Get started by inputting all the obvious information. The one area where you may not be sure is injector duty cycle (the percentage of time that the injectors are held wide open at maximum engine load). Typically, our high-output engines are tuned for about 80 - 85% maximum duty cycle, so start there unless you know otherwise. Click the top "calculate" button and the program will tell you what your actual flow rate is.
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Next, pick the range into which your maximum boost level falls. Your level may be at the very limit (upper or lower) of one of these ranges. So, if you've got a very high-strung turbo that's pumping hot air, choose the next higher boost range. On the other hand, if your engine is equipped with a very efficient charger, then it may make sense to chose the next lower bracket. There is a fudge factor here, so keep that in mind. Leave the pump pressure at 150psi and click the bottom "calculate" button. The program will give you a recommendation at the very bottom.
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If the recommended nozzle flow is significantly different than the actual flow, you can adjust pressure (max 180psi) so that the numbers come close to matching. An exact match is not necessary since this is only a ballpark estimation method. You will dial in final flow adjustments via the Stage 2 control unit. Have fun!
i'm down for 2 kits.
now i'm on a mac so I can't run that app, which means i'm not 100% on nozzle or what else i need but i'm sure we can discuss it when i need to pay.
also, since i'd be running it every day, i need a larger reservoir.
but i'm totally down for 2 kits whenever.