OH NOOO: I put Washer Fuild into my motor...., ... and it made it go faster! Options

[lagos]

over the past few months, ive been trying to street tune my car to get the most of out my setup. i noticed that i could run 13psi just fine, and sometimes even 14 or 15, but sooner or later i noticed that i would see knock response on my tvsv leds. after trying a lot of things to resolve the problem, i came to realize that the jdm ecu just runs too much timing advance for our pump gas. youll hear mr2oc guys always say how they keep their boost at 15psi, with no problems, but then you look at their dyno sheets and they are only making 200whp at that boost level. so, if the turbo is good for it, and we have the fuel to support it, then the problem must be timing.

so decided to fix the problem by buying water injection. i got the Devils Own water injection kit. i have it running pure washer fluid, 3gpl nozzle, and injection starts at 10psi. it made a huge difference! i can now run 16psi, with no knock and the car pulls like crazy. ive yet to try any more boost then that ( and i probably wont), but im confident that it would do 18psi with no knock, if i really wanted to push it. youll hear people say the ct26 falls on its face after 15psi.... but all of that changes with water injection. your intake charge is cooled down in a major way, and it makes a world of difference, especially on our jdm ecu's that are tuned for higher octain gas.

here are some pics. i installed it in my trunk, because i had almost no room in the engine bay. sorry for the wiring mess, i was going to clean it up before posting pics, but its just to damn cold out right now.







This post has been edited by lagos: Jan 11, 2007 - 11:30 PM

[lagos]

i was running around 13-14psi before with safc street tuning. now i can run 16-17psi with no safc adjustments and no knock. but thats just to give you a basic example. im going to the dyno this weekend and i should have some before and after comparisons to see the exact gains it gave me.

as far as your car (or anyone else), i cant tell you what you could turn the boost up to. you really have to take your car to a dyno to see how it runs at the 15psi you have it set to now, and then decide whats best for you from there. even if your stock boost is 15psi, that doesn't mean that your car will run perfectly on our lower octain pump gas. if thats the case (as was with my car) then water injection SHOULD help you out in a big way. you could probably even turn the boost up some more beyond that, but its something that i would only do if i had a way to monitor what my car was doing at all times. i have a wideband and a way to monitor knock response. so im using those to see how far i should push things.

so basically, if i were you, i would:

1: take the car to a dyno. see how far you can turn up the boost before getting knock response.
2. get water injection. you might gain HP from it, or you might stay at the same power level. but either way, it will make the car a million times safer and allow you to run more boost safely.
3. think about getting at least an egt gauge and doing the knock led mod.
4. go back to the dyno and see what you gained.