[RacerXS]

No luck involved, a good tune is what got you there. That, and not beating the b@lls off your car regularly.

Originally Posted by SR2017

I've got 36,000 miles on my 2005 STI.

SZ49 with methanol injection at 22-23 psi making about 410 whp and 440 wtq.
No problems yet. I've had my car modded for 20,000 miles. No increased oil consumption. No leaking at all. Runs smooth and crisp. Maybe I won the mod your car and it runs well lottery. Of course, my luck and the car will suffer some catastrophic failure soon. I continue to make offerings to the subaru gods for their favor and my gratitude.

[ace996]

Originally Posted by sutter2k

What happens if you have a higher HP setup (e.g. your alky nozzle is bigger)
and you hit the test button at a traffic light. But revs are up slightly.

Is it burned up fast then?

Um...don't really know how to answer that, as there are many variables. On my recently sold magnacharged Z06, that had meth, I only tested the sprayer when the car was off...this eliminated the possibility of bore-wash and wear on the rings.

If you do what is written above, then the meth will be sucked in like normal. A certain amount of meth will burn..whatever is able to burn, the unburned meth will be forced out the the exhaust ports...perhaps making an interesting flame out the tailpipe(should be a pink flame at night....invisible during the day). If there is really too much meth, then it could cause bore-wash...not really good.


Meth/water injection is a phenomenal addition to a turbo motor when used properly...properly, yep...I said it twice.
The specifics of the kit - nozzle size, amount of spray, when it comes on, ramp-up of flow, ect. - it's all important and one needs someone who really knows how to install and TUNE for it.

One can go very conservative (10% of fueling needs....50%meth/50%water) to very aggressive (20-30% fueling needs...100% meth use) and each level brings it's own differences.

Meth injection doesn't blow motors...people blow motors.

Be good,
TomK

[Saabaru STI]

There's many variables that involve meth or water injection that can blow a motor.

The only real two that should be a concern to any of us is...

1.) The tune
2.) Water/meth injection failure

Many of these blown motors could be caused by either of the two above. Some people, especially ones with a blown motor, will be advocates that it wasn't the product or tune that caused the failure. The reality is the minute water/meth injection came out, there was a possibility of failure.

Personally, I would never run water/meth if it didn't work in conjunction with the ecu like the Hydramist does. Tune low-octane map and meth/water injection map. The minute flow is interrupted or stopped, the ecu automatically switches to the low-octane map. Then the only thing I need to worry about is the tune. With Phil as my tuner, that problem is nulled.

If I didn't have a tuner like Phil and a water injection like the Hydramist, I would definitely be on pump only. I can't afford to have a blown motor.

EDIT:

BTW, I hear about these tunes and the problem definitely sounds to be in the tune to me. Stock turbo/block and 25+ lbs of boost?!?!?! Phil was only running 23lbs of boost with his GT52 and 93+meth/water. Someone got too excited with the boost controller IMO.

[Hitman83]

Originally Posted by shvrdavid

I thought I would add this...

93 octane...
22 to 24 psi...
Meth injection...
over 400whp...
At almost 36,000 on stock engine...
Daily driver...

Meth doesn't kill motors.... Tunes do....

36,000miles is not a lot of miles for an engine...How many people on this board have hit 100+K on a modded STI? Stage 2 even...my guess is not many

[QuickSilverSTi]

Originally Posted by emkingsb

36,000miles is not a lot of miles for an engine...How many people on this board have hit 100+K on a modded STI? Stage 2 even...my guess is not many

I doubt you will find many STi's modified or not at 100K+ since they just came out a couple years ago and I don't think they fit the "long commute" buyers criteria. I drive my 2005 9-2x quite a bit and I just turned 30K...my '04 STi is just at 20K because I don't drive it all over the place.

[modaddict]

HOLY 6 month bump?!

[Hitman83]

Originally Posted by QuickSilverSTi

I doubt you will find many STi's modified or not at 100K+ since they just came out a couple years ago and I don't think they fit the "long commute" buyers criteria. I drive my 2005 9-2x quite a bit and I just turned 30K...my '04 STi is just at 20K because I don't drive it all over the place.

Very good point. Hopefully they pass the test of time

[13rus]

Came across this from the water/methanol injection questions thread.

Meth doesn't kill engines. High boost doesn't kill engines. It's knock/detonation that blows up engines.

On a properly modded STI, combine 93 octane + 80/20 mix of meth/water, with #15 alcohol nozzle and 850cc injectors and you get ~100 octane and a whole lot of increased cooling efficiency. Plenty for very safe 25psi of boost on stock block.

Combine all this good stuff with a poor tune, say with a very high timing or too much fuel pulled out - and you get knock = broken rods, holes in the block, etc.

So if you mod your car, tune good, tune safe, take it one baby step at a time. And use meth!

[blindfold]

when methanol doesn't spray when it's supposed to, your engine is at serious risk. Doesn't matter if it's the pump, nozzle or controller, so be careful.

[05'WRB]

Or keep your boost at 18-20psi on pump gas for bigger turbo. If you track it or 1/4 mile, put some race gas and she'll last a long time. Of course with a good tunning.

People seems to forget it's a 4cyl/2.5L engine and not a big block ie. 454cid/V8. Some peoples are asking too much from their little engine IMHO.

[superhero06]

28500 total miles 16000 on a 20g w/ meth, 25psi daily driver no problem so far.

[FastieMagee06]

Im thinking about getting a meth inject kit but do I have to get a tune for it? Or is that just to fine tune things? I want to run around 350-400 Hps on 93 Oct... This is a progressive kit off ebay for about $360, the one with the tank included! What'd ya think?

[esqdgg]

Originally Posted by FastieMagee06

Im thinking about getting a meth inject kit but do I have to get a tune for it? Or is that just to fine tune things? I want to run around 350-400 Hps on 93 Oct... This is a progressive kit off ebay for about $360, the one with the tank included! What'd ya think?

sticky (1st post): http://www.iwsti.com/forums/water-me...qs-sticky.html

Originally Posted by halfelite

Engine Damage:

Without a proper tune Injection can cause lots of damage to your engine And even with the right tune you still run the risk of the injection system failing causing your car to run at levels it is not possible to sustain and will cause immense engine damage.