Rb25 On Boost At Idle?

[hardsteppa]

So was rigging up a vacuum line to do the ol' skool steam cleaning of the engine....pulled off the boost controller hose that's connected to the bung on the std intercooler return pipe (connects to crossover pipe) and instead of it pulling air in at idle, it's pushing air out? So it's under pressure instead of under vacuum? How can that possibly be, shouldn't intake be under vacuum at idle?

[zebra]

the plenum will be under vacuum, but between the throttle plate and turbo outlet will under slight pressure

[hardsteppa]

ahh ok, no worries.

[The Mafia]

Steam cleaning?

[hardsteppa]

steam cleaning. Running water through a vacuum line into the engine, effectively pressure-steam cleaning the engine, to remove carbon build up.

[zebra]

THIS

is what you are going to end up with

[Bsa]

Looks like a 10 g clean

[Bunta]

dont try this at home kids

[R33 Eddy]

THIS

is what you are going to end up with

Really? what about WATER methanol injection... that does not cause this problem.. sure it might if heaps of water got in but a small mist couldn't hurt could it?

[hardsteppa]

thanks for the feedback. Are any of you an engine rebuilder or qualified mechanic? cause looks like I might need one ..j/k. But seriously.. didn't end up with that.

[zebra]

3-4mm vacuum line vs high pressure wmi mist setup

[89CAL]

water meth is atomsied so it works, Have seen a conrod not 2 weeks ago that looked like the one above due to water in the cylinder.

Sucking water into your engine through a vac line is a new one, and also not the smartest idea in the world.

[TiTAN]

Really? what about WATER methanol injection... that does not cause this problem.. sure it might if heaps of water got in but a small mist couldn't hurt could it?

WMI operates at 150+psi and injects in the order of ML per minute a garden hose into a vacuum line does not operate the same way.

[The Mafia]

Ahahaha f**k, this is as good as porting your intake by starting the car, and putting sand into the intake.

Dude, you're doing it wrong.

Haha this steam cleaning made my day.

[hardsteppa]

glad I could brighten your day . It's not a new one though, been around a long time.

[R33 Eddy]

WMI operates at 150+psi and injects in the order of ML per minute a garden hose into a vacuum line does not operate the same way.

who said garden hose..... i use a fire hose

[gotRICE?]

Mix in a little sand for a free port polish too

[pipster11]

i think its mainly popular in the usa

i was a member of a usa subaru forum when i had my outback and a few ppl on there used to do it

ur supposed to use a thin clean line, warm the car up, raise the revs a little and dip the end of the clear line into some water and suck a little up, maybe 1-2cm's length on a 2-3mm hose

supposedly it'll vaporise a little on the way though the manifold and then turn to steam in the motor and clean the carbon out (subaru's apparently get a lot of shit in the heads/valves)

don't think i ever did it but yeah, just a little info for you guys

maybe i'll try it on my puss-bucket corolla

[BMYHOE]

surely water on it own can not clean like you guys are descibing unless it has 100BAR of pressure like my gurni.

[TiTAN]

engines that run WMI (my own included) actually are pretty clean inside when pulled down or inspected.