im new to the subaru crowd with my 09 STi and have lots to learn! my first mod is going to be a CBE system and secondly i have to admit i want the pshsssss so is that a bov or wastegate? i was reading up a bit on them and it sounds if its not a 'recirculating' one they are bad for the car? i want the sound but dont want any harm done to anything... please keep the bashing to a minimum :biggrin:
You are not going to get "psssch" sound with recirculating BOV. You could make it a little louder by modifing you air box or getting an aftermarket reciculated BOV. If you want to keep your warranty i would highly recomend not to buy atmospheric BOV.
not too worried bout the warranty as its up in under a year i believe. so and aftermarket recirculationg bov does make the sound?? also is there a silencer in the airbox or something thats easily removable? thanks for the feedback!
Sounds like you're talking about the BPV in which if you really want that noise and hear it, you'll want to use an aftermarket, atmospheric BOV. Read here for more info: http://forums.nasioc.com/forums/showthread.php?t=468038 I don't think most guys here run an aftermarket BPV unless they're going for more boost than the stock can handle. Otherwise, it's a bit pointless and just messes with your fuel mixture a bit.
an external wastegate dumped to atmoshphere will make a huge sound when it opens but I'm guessing the noise you're thinking of is a vented blow-off valve. recirculated is better for the car in theory but many people have run vented without issues as well. I don't run a bpv or bov on my STI at all (blocked off)
dont mean to jack this thread but, Carl. do you get allot of noise with it blocked off? Any problems with wear and tear to your turbo so far by doing this?
very loud compressor surge - the normal rally car sound you hear in videos. took the vf39 off this weekend, pretty much zero shaft play, turbo was practically new
I don't think I'd do it on a daily driver, it would probably wear the turbo pretty quick with regular miles. I really only put like 2 or 3k on the car a year.
I would recommend a little reading on the turbocharger system in your Subaru. That way you can make a (semi)informed choice about what you are doing as you do things to your car. This makes me want to search for that best blow off thread.
No research necessary. This thread will contain all the information you need: http://mnsubaru.com/forums/showthread.php/17902-What-are-blow-off-that-can-has-best-sound-valve?highlight=what+are+best+blow+off+sound+I+can
+1 Get a K&N Panel Filter or a SPT intake first, this will exagerrate the noises you are interested in. It might even survive the forum mod-bashing gauntlet (anyone?). P.S. If you wind up with a particularly loud CBE, it's going to be much harder to hear your psssh's.
SPT == Subaru Performance Tuning, basically Subaru endorsed (I'm not confident enough to say they are all Subaru mfg'd) aftermarket parts. They are quality, tasteful (imho) parts. If you are not modding with a power goal in mind, I wouldn't recommend any intakes that require scaling your MAF sensor (read as, require a tune). MNSubaru, Nasioc and Google search are your friends here. You might start with Unabomber's FAQ's on Nasioc (though sometimes dated): http://forums.nasioc.com/forums/showthread.php?t=477393
Addendum, if you are modding with a power goal in mind, you should discuss your intake options with your tuner.
I had the SPT short ram on my WRX for awhile and it will give you the sound you are looking for with the stock bypass. Also the turbo spool is louder than with a stock air box. But after I did some reading, I found that they can create a lean/rich problem without a tune. I had nothing else on the car at the time and did not want to get a tune just for an intake, so I sold mine and went stock with a Perrin drop in and Perrin Afta MAF tube. Still working on the silencer delete, but from what I have been told it works well. Your best bet would be to get your CBE and an SPT short ram or cold air at the same time. Then talk to Bullwinkle or Nuke about a stage 1 tune. That way the intake will not create a lean/rich problem. Just a thought from another noob.
You can still get the Psshh sound with a recirculating blow off valve. There is a recirculating version of the TurboXS RFL I believe, which is still very loud. There are also a couple of options out there that will vent 50/50 air/recirc.
I have PSSHHHhhhhhh with my setup. You have to pay attention and you'll hear it. I have a 3" MAF pipe and stock inlet.
wow! a lot of great info guys! thanks a ton! i like the idea of the SPT products...clean and tasteful again thanks! beers on me if i ever make it to an event!
Stay away from a short ram intakes. They pull hot air from the engine bay and most often lose power. If you absolutely must go with an intake, find a CAI. With that said, I would strongly suggest you do additional research before purchasing anything. Subaru's are notoriously fickle when it comes to intakes.
not a huge fan of CAI. I had one and living on dirt roads i actually sucked up some water into the engine was not pretty..luckly did not hydro lock it.
So, im searching for the SPT stuff and it seems that they only place you can get them thru is Subaru's website which is fine but they have no pics of any of the items! Is this cuz they want you to go to the dealer or what?!
Subaru has not come out with an intake for the 2008-11 sti/wrx yet anyways. That is why you are unable to find one.
Do the newer ones have the same piece in the passenger wheel well? The OP could take that out and see if that is enough of a noise. Certainly is cheaper.
THIS!!!! In fact when you did my stage 2 tune Nate. My short ram was KILLING my numbers big time. Nothing like a good stock intake ive learned.
I had the SPT intake on my 04' non-STi and it had an audible psshh sound (or whatever). I actually thought it sounded cool and wasn't obnoxious. Mine was basically a drop-in to replace the existing stock with the shroud to keep the engine heat away from the filter. I didn't care for the short one. +1 on whomever said the SPT stuff is nice/tasteful. I really dig their stuff and a lot of it won't void any factory warranty. As for a modified intake, I am not sure on that one. Exhaust, does not void the warranty.
The GR's don't have any intake silencers to remove in order to increase blow off noise as far as I know...
