Raptor Will Not Blow Off....

Z-tarded · Tweet this Post! #1 (**permalink**) 04-20-2011, 01:09 PM

I recently purchased a 2004 350Z with a Turbonetics ST system running a Raptor BOV. The kit was bought from TreadstonePerformance.com (so you know the exact system). The turbo runs great and generates tons of power but the BOV will not blow off. Long story short, I've adjusted the spring tension screw, I've cleaned it up, I've tried everything I know to do (witch ain't much!) The thing sounds like a turkey call no matter what I do to it! I SUSPECT that the Raptor shipped with a spring that is just too damn stiff for the 8psi setup. I'm almost certain this is the case. I've contacted Treadstone and Turbonetics and they both pretty much told me to get a new BOV. Can I just get a new spring from somewhere? Where? Any help is much appreciated. I know very little about turbo systems. Let me know what advice you turbo guru's have to offer........

Robert · Tweet this Post! #2 (**permalink**) 04-20-2011, 07:00 PM

Quote:

Originally Posted by Z-tarded

I recently purchased a 2004 350Z with a Turbonetics ST system running a Raptor BOV. The kit was bought from TreadstonePerformance.com (so you know the exact system). The turbo runs great and generates tons of power but the BOV will not blow off. Long story short, I've adjusted the spring tension screw, I've cleaned it up, I've tried everything I know to do (witch ain't much!) The thing sounds like a turkey call no matter what I do to it! I SUSPECT that the Raptor shipped with a spring that is just too damn stiff for the 8psi setup. I'm almost certain this is the case. I've contacted Treadstone and Turbonetics and they both pretty much told me to get a new BOV. Can I just get a new spring from somewhere? Where? Any help is much appreciated. I know very little about turbo systems. Let me know what advice you turbo guru's have to offer........

You could also have the line in the wrong spot. Do you have the line running from the intake manifold to the upper port?

Z-tarded · Tweet this Post! #3 (**permalink**) 04-20-2011, 08:44 PM

I'm almost certain that I do but, I will check tomorrow and post back to you. Thanks for the idea that the line may be switched. I will definitely double check it. Thanks....

Z-tarded · Tweet this Post! #4 (**permalink**) 04-22-2011, 01:42 PM

Yep. Everything is hooked up correctly.

Robert · Tweet this Post! #5 (**permalink**) 04-22-2011, 02:13 PM

Quote:

Originally Posted by Z-tarded

Yep. Everything is hooked up correctly.

If that's the case you can try to run another line to the BOV to see if that helps. The idea is you run a line from BEFORE the BOV to the bottom port of the BOV. What that does is help force the valve open when it sees vacuum at the top and pressure at the bottom. If that doesnt work then the BOV is bad.

Z-tarded · Tweet this Post! #6 (**permalink**) 04-22-2011, 04:27 PM

Sounds like a good weekend project. I guess that will be my next move. Thanks again for the help!

Z-tarded · Tweet this Post! #7 (**permalink**) 04-23-2011, 10:18 AM

Quote:

Originally Posted by Robert

If that's the case you can try to run another line to the BOV to see if that helps. The idea is you run a line from BEFORE the BOV to the bottom port of the BOV. What that does is help force the valve open when it sees vacuum at the top and pressure at the bottom. If that doesnt work then the BOV is bad.

So I need to connect the bottom port of the BOV to anywhere in the boost tube? All I am looking for is positive pressure right? This would involve drilling and tapping the boost tube somewhere correct? This may be a stupid question.....could I drill and tap a fitting into the plastic air sensor part instead of the boost tube? Would that be just as good or would it not be advisable? I'm gonna try and do this today. I'm going to get some fittings and hose now. I apologize if these are "noob" questions. I'm NOT all that good with engines/turbos. I just love to drive them!

Robert · Tweet this Post! #8 (**permalink**) 04-23-2011, 09:18 PM

Quote:

Originally Posted by Z-tarded

So I need to connect the bottom port of the BOV to anywhere in the boost tube? All I am looking for is positive pressure right? This would involve drilling and tapping the boost tube somewhere correct? This may be a stupid question.....could I drill and tap a fitting into the plastic air sensor part instead of the boost tube? Would that be just as good or would it not be advisable? I'm gonna try and do this today. I'm going to get some fittings and hose now. I apologize if these are "noob" questions. I'm NOT all that good with engines/turbos. I just love to drive them!

You should be able to tee into the compressor port

Z-tarded · Tweet this Post! #9 (**permalink**) 04-23-2011, 09:43 PM

Quote:

Originally Posted by Robert

You should be able to tee into the compressor port

I'll be honest, I looked that turbo all over today and I don't even know where the compressor port is. I've also been looking at the installation manual .pdf for the turbo system and it has no clear pictures of this port. Do you know where exactly it would be located on the 350z kit? I saw a port on top between the compressor and the turbine but, I think it's an oil fitting and not a vacuum fitting. I just get more confused by the minute.

Robert · Tweet this Post! #10 (**permalink**) 04-25-2011, 09:18 AM

Quote:

Originally Posted by Z-tarded

I'll be honest, I looked that turbo all over today and I don't even know where the compressor port is. I've also been looking at the installation manual .pdf for the turbo system and it has no clear pictures of this port. Do you know where exactly it would be located on the 350z kit? I saw a port on top between the compressor and the turbine but, I think it's an oil fitting and not a vacuum fitting. I just get more confused by the minute.

The compressor port should be next to the compressor outlet where the silicone hose connects to the pipe leading to the intercooler. See below