This is a follow up on my earlier post. Here's the engine of my new 951(affectionately named Storm due to recent events). The intake is routed funky with the filter popping out the drivers fender well...which is why i sucked up some water and blew the head gasket.

Anyways, what is the little valve that i'm holding in the second pic? should the bottom of it be open?

<img src="http://boards.rennlist.com/upload/stormmotor.jpg" alt=" - " />

<img src="http://boards.rennlist.com/upload/stormmysterypart.jpg" alt=" - " />

<img src="http://boards.rennlist.com/upload/stormfilter.jpg" alt=" - " />

 

It's the compressor bypass valve. As you are still using an air metering device the outlet to the valve should be plumbed into that shiny intake pipe of yours.

 

I don't know where your $ pain threshold is, but you could get Guru's MAP kit (sans their intake pipe and use the one you've got with a cone filter on the end in place of the airflow meter thats currently plugged onto it) and then have no "surfing" problems and more power to boot.

 

It is the stock blow off valve which is there to release pressure from the turbo when you left off the throttle. Some people disconnect this to make a whooshing sound. Unless you have a MAP sensor setup like GURU racing sells, you are actually losing some valuable air that is part of the air/fuel calculation in the DME. That looks like a homemade J-pipe attached to the turbo that has the stock air meter attached to a cone filter protruding from the stock air inlet hole. I presume this was done in order to continue to get cold air from the tire well. I hope this helps get you started. There are many others on here that can tell you much much more.

Good luck. Welcome to the addiction known as 951.

 

Great minds think alike. <img border="0" title="" alt="[Wink]" src="wink.gif" />

 

Please let the next poster have a red 951 as an avatar.

 

I don't think water coming in your filter there caused your head gasket problem. It would be hard to in jest enough water for a significant amount to make it into the intake manifold. If you are replacing your head gasket the first thing I would do is put the car on a dyno I would bet that your A/F ratio is off and that caused your head gasket to blow.

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Russ Murphy:
<strong>Please let the next poster have a red 951 as an avatar.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">OOPS sorry!

 

Who did that boch up job on the j pipe. At least you live in cali. Not that much rain out there. I suppose if you get water in the intake it wouldn't help the situation. I noticed the silicone blue hose off of the banjo bolt. How much boost were you running when she blew?

 

I don't think water coming in your filter there caused your head gasket problem. It would be hard to in jest enough water for a significant amount to make it into the intake manifold.

Did you see all of the dirt on that filter. there is definately a problem with that setup.

 

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by jimbo1111:
<strong>Did you see all of the dirt on that filter. there is definately a problem with that setup.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">I didn't even comment on his setup. I just don't think his head gasket problem has anything to do with sucking water in the filter.

 

Oh wow! What an amazing night. For three days i was in pure bliss with this car. Then after a drive on wet roads she was billowing white smoke everywhere. So tonight I started to take her apart and begin the head rebuild process. I disconnected the intake tube and found that the stock AFM box was filled with water. After removing the intercooler pipes i noticed that the intercooler was full of water too. I sucked/dried both out and thought....well, gee what if the head gasket isn't blow. I start her up and what do ya know...she doesn't smoke. Hmmm....so I let her warm up put everything back on and take her for a spin. I have full boost(i'm assuming with the stock gauge pinned at 2 bar) and she accelerates as nice as ever. No white smoke is to be found. I ran a quick compression test and I'm still at 130 on each cyclinder(low, but squirting some oil in there didn't help).

In the last few days I've gone from being the happiest guy on earth, to the saddest, to somewhere in the concerned middle.

I would love feedback/suggestions on my current setup. My knowledge of turbos is increasing, but I'm not sure what the right setup should be. Obviously that air filter setup isn't it. Yes I did notice the air filter was trashed...so I will have to do something there....really debating the guru kit now that I don't need a head rebuild.

 

You are lucky you didn't have hydro lock, this would mean major engine damage. Disconnect the air duct from the fender, a big pothole or puddle can force water into the engine with the original setup.

 

Hmmm, interesting... I want to take a close look at this car when I'm up there on Sunday. Yeah, I recommend moving the filter away from the puddles. It's a mistaken assumption that hot air in the engine-bay causes you problems. Above 15mph, there's enough turbulence and flow that it's the same temperature as outside ambient air. However, the 'fixes' with trying to avoid that hot-air assumption can lead to some serious problems.

MikeS. actually averted a disaster so he's lucky. You don't ingest water all at once and blow up the engine like in hitting a puddle. Gravity tries to drain the water out, while the incoming air tries to pull it up; it's a tug of war battle. So the water makes its way upward slowly by filling every crevice and pocket that will hold it. Then with each full-throttle run that creates enough flow, the water will creep up to the next crevice that can hold it. In a way, your intake plumbing fills up from the bottom up like a bottle. Eventually enough air makes its way up to the engine and creates the smoking that MikeS. saw. If you're unfortunate to have all the factors converge on the bad side simultaneously, perhaps such as hitting that final-straw of a big puddle, cornering just right to dump out the pockets of water, and have sufficient flow to suck it all in, then you will indeed hydrolock your engine and throw a rod through your engine.

It has happened before, but the numbers are very rare, but the stories have become an urban legend of sorts in the 944 community.

 

I looked at a 944 a several years ago that had a brand new engine because of this. He had the stock airbox. He hit some standing water and because it draws air from a fairly low point and right in the front it sucked the water in. Wah-la blown engine Run from whoever stuck that air filter through the fender. <img border="0" alt="[ouch]" title="" src="graemlins/c.gif" /> He must have never ever driven that thing in the rain. I would get that thing re-routed quick. And yes that thing you are pointing to is the stock blow off valve.