boost controller for the 2004 sti.
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i would try aftermarket boost controller like Apexi, blitz etc, do you really need a spray kit to reduce detonation if you are only increasing boot 3-4 lbs (running @ 18-19 psi) on 92 octane gas, how about running on higher octane gas ie. octane booster? i would think the stock fuel and ignition mapping can handle it, Btw what type of water spray system are you using? does it come with an module of some kind to monitor and controll the spray duration? i personally think runnig that system is risky, but let me know how it works out for you. 
Billy
Billy
Instead of messing around with water injection just a simple boost controller, why not wait to see what Vishnu, Prodrive, Ecutek, etc come up with as far as ECU replacements go?
I have seen one too many friends blow stuff up or break it going with boost controllers and "patches" like water injection.
If you really want more power, and safe power- go with engine management. That's my humble opinion.
Careful engine management will do wonders and cost about the same or less than water injection, and the boost controller combined.
IMHO
I have seen one too many friends blow stuff up or break it going with boost controllers and "patches" like water injection.
If you really want more power, and safe power- go with engine management. That's my humble opinion.
Careful engine management will do wonders and cost about the same or less than water injection, and the boost controller combined.
IMHO
jj's dead-on on this one. if you're buying a car like the STi, don't treat it like a mkiv or fd... those are great cars, but automotive technology has advanced in the last 10yrs, and there are better ways to make more power.
i think fiddlin' with the ecu is going to be the way to tune the new generation of cars. there'll be other upgrades, but ecu tining is where the real power is made.
i think fiddlin' with the ecu is going to be the way to tune the new generation of cars. there'll be other upgrades, but ecu tining is where the real power is made.
thanx for the advice, this is My first turbo car, have a honda s-2000 , decided to leave it relatively stock{ lower 1 inch and drilled rotors}but the sti id like to mod the power a little , sounds like the ecu would be the right way to go ,thanx :wink: :wink: :wink:
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water injection is what the wrc teams use for their cars to make ultimate power. i read somewhere that they use 3 gallon per mile of water. injecting liquid water is very effective because it absorbs so much heat turing it into vapor and there by reducing the detonating ability of running high boost
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Interesting. I'm going to assume it would be something they could turn off since lets say a stage at 25 miles means they would have to carry 75 gallons or water which weighs 624.75 pounds given that a gallon of water weighs 8.33 pounds. That's alot of weight!standardcraig said:
lates,
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yup, supposedly they also have active ballast which allows them to shit the fore/aft distribution for ideal balance. yeah i would assume that the water injection is only active during super stages, when they travel on the road they have all the regular road rules to obey.. just ask Tommi about that!
Hey guys i went to the web site posted above and found the following info on the spray kit:
I would like to increase my power output by increasing the boost pressure, would water injection help then?
It all depends, if you have good quality fuel and the ambient is not too high you can normally get away with 2-3 psi of boost increase without using water injection and will not run into detonation problems. On the other hand, if you DO NOT have good quality fuel and the ambient temperature is high and there is a slight tendency to engine knock, water injection or a bigger intercooler is essential.
so it should be ok to increase boost on the STI 2-3 lbs and the stock fuel/ign. mapping should be able to handle it. with the water spray system that came with the car we might be able to expand that number a little...we'll just have to see until we start to play around with it.
Billy
I would like to increase my power output by increasing the boost pressure, would water injection help then?
It all depends, if you have good quality fuel and the ambient is not too high you can normally get away with 2-3 psi of boost increase without using water injection and will not run into detonation problems. On the other hand, if you DO NOT have good quality fuel and the ambient temperature is high and there is a slight tendency to engine knock, water injection or a bigger intercooler is essential.
so it should be ok to increase boost on the STI 2-3 lbs and the stock fuel/ign. mapping should be able to handle it. with the water spray system that came with the car we might be able to expand that number a little...we'll just have to see until we start to play around with it.
Billy
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Maybe in places where you actually get decent gas, but not in California.OnefastWRX said:
Keep in mind that the water spray system is NOT water injection. Water injection systems are carefully controlled systems that spray a very fine atomized mist directly into your intake tract to cool the charge and make detonation more difficult.
The water spray that comes with the car, on the other hand, just sprays on top of the outer surface of the IC in 2-second bursts when you MANUALLY press the button. The reviewers have consistently said that this feature has very little real practical value and is basically just something "cool" that they added. The only time you will notice a slight difference is during very hard driving in HOT conditions, like, say, an auto-x in Phoenix at the end of July...
10 sti
Thanks for clearing that up, We started out with talking about water injection and i am aware that the stock i/c spray kit is not as impressive however i personally would choose something other then water to cool my combustion temp. i've installed an alcohol spray kit into an 95 3000gt vr4 and it worked great just because the car from factory had a fuel cut off when certain amount of boost is reached, that kit actually cooled the temp also kept the car from cutting off when excessive boost is reached, it is a system thats monitored very carefully too, the point is, if system fails with the aquamist you risk hydrolocking your motor, the system fails with alcohol you'll run your engine too rich, you'll probably notice it before anything major could happend, andyou'll probably pick that up from your a/f ratio monitor. which i thnk is a must for turbo cars along with an egt. its just my opinion thats all...
Billy
Thanks for clearing that up, We started out with talking about water injection and i am aware that the stock i/c spray kit is not as impressive however i personally would choose something other then water to cool my combustion temp. i've installed an alcohol spray kit into an 95 3000gt vr4 and it worked great just because the car from factory had a fuel cut off when certain amount of boost is reached, that kit actually cooled the temp also kept the car from cutting off when excessive boost is reached, it is a system thats monitored very carefully too, the point is, if system fails with the aquamist you risk hydrolocking your motor, the system fails with alcohol you'll run your engine too rich, you'll probably notice it before anything major could happend, andyou'll probably pick that up from your a/f ratio monitor. which i thnk is a must for turbo cars along with an egt. its just my opinion thats all...
Billy
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