This pic shows how I have my BOV. Today I saw the guy who Dynoed my car at Speed Injection and he told me that on his EVO the BOV is installed the opposite way as mine and that I need to change the position. Mine is set up just like the stock one, with the nipple up top and the opposite end going to the J-boot/ MAF and the side port going to the throttle body/ IC pipe. Is it correct? He said the bottom of the spring part (where there is pressure to push the piston) should be attached to the throttly body and the side port where the air is dumped thru should be going to the MAF, in other words, my BOV would be sideways if this is true then the nipple would be facing the front of the car, instead of up, is he right or is it right how I have it now?

 

I've seen cars with BOVs and they are positioned differently. Since you are still using a bypass valve I don't see why you'd reposition it. You have it exactly where porsche put it, and with how it's designed, if you were to switch it then it wouldn't work correctly.

-Darwin

 

Tell your dyno guy to stick to Evos

 

But look at my blow off valve, doesn't it empty through the side port? If so, it is going to the throttle body and not the MAF as seen in the picture.

 

Here's a thread that shows the breakdown of your diverter valve and a little info.

https://rennlist.com/forums/944-turbo-and-turbo-s-forum/361247-is-my-diverter-valve-bad.html

-Darwin

 

I read that post, as you see my question was never answered...

 

Hmmm...anyone else care to chime in? I see his question, too.

-Darwin

 

My Diverter valve is in the same position as the one in that thread link you sent, and it's the same design as mine, which is the piston being pushed from the bottom (MAF pipe) and exiting through the side port (throttle body/IC pipe) and the nipple on top, is this the way it's supposed to be or it is supposed to be the only other way, sideways?

 

well sinse they look like diafram typ the correct way is with the boost pressure shown to the smaller area of the diafram wich is "probably" the under side . BUT as the accuator sees more diapram area than either port it is realy trivial .
take off the recirulating pipe so it is facing us block the afm tube hole soapy water in the hose

no leak??? schools out no problem .
if you can be bothered .
the other thing you can do is pressure test the side your using bike pump .
but realy if it seals and opens when it's told its right .

 

Luis, your evo tech sucks, your valve is in the correct position

 

Thanks Luis, that's what I thought (and hoped)

 

Why would you want to copy the design of the Japenise, Porsche invented turbocharging not the riceman. They always copy and change things around, most of the time it doesnt work well. The EVO is a pot luck dinner.

 

Ok, let's see if we can find any licensed Mitsubishi design elements in the 944 engine... Anyone?

 

Japanese crap in our pure Porsche cars, never not even the balance shaft.

 

$1 (usd) per engine to mitsubishi per engine made with that mitsubishi patent, right?