SwedeSpeed - Volvo Performance Forum banner

1 - 10 of 10 Posts

·
Registered
Joined
·
96 Posts
Discussion Starter · #1 ·
When I hit about 5000 to 5500 rpm's I hear a whistling noise that subsides as rpm's get higher. I am pretty sure that the whistling noise wasn't there before the mods, which were done all at the same time (BSR PPC, BSR exhaust and BMC air filter).<p>I was at the dealer's today to get something and told them about it. They checked the car, said I need not worry about it but pointed to either the BMC air filter or the ppc as the culprit (which was to be expected of course).<p>I exchanged the air filter with the stock and it still whistles. I didn't have time to uninstall the ppc and check if the whistling is still there (I will do that on Friday hopefully) but I was wondering if any of you with BSR's ppc have noticed this whistling noise as well. Maybe it has to do with the turbo pressure?
 

·
Registered
Joined
·
96 Posts
Discussion Starter · #3 ·
I came home from work about 10 pm for the 3rd day in a row, having had food poisoning over the weekend... Let's just say that I am very close to dead at this point:)
 

·
Registered
Joined
·
1,844 Posts
Re: Whistling noise @ 5000 - 5500 rpm (acg69)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>acg69</b> »</i></TD></TR><TR><TD CLASS="quote">When I hit about 5000 to 5500 rpm's I hear a whistling noise that subsides as rpm's get higher. I am pretty sure that the whistling noise wasn't there before the mods, which were done all at the same time (BSR PPC, BSR exhaust and BMC air filter).<p>I was at the dealer's today to get something and told them about it. They checked the car, said I need not worry about it but pointed to either the BMC air filter or the ppc as the culprit (which was to be expected of course).<p>I exchanged the air filter with the stock and it still whistles. I didn't have time to uninstall the ppc and check if the whistling is still there (I will do that on Friday hopefully) but I was wondering if any of you with BSR's ppc have noticed this whistling noise as well. Maybe it has to do with the turbo pressure?</TD></TR></TABLE><p>It's not the PPC. I had the same thing happen after I changed my catback to the Jetex (BSR catback=Jetex catback). I initially thought there was something wrong (leak, exhaust touching the drive shaft, etc.) but after checking, everything was fine (no leaks, etc.). I then chalked it up to a change in harmonics caused by the new catback. It actually sounded cool to me <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/tongue.gif" BORDER="0"> so I left it alone. I believe I've seen someone who added the EST catback (EST catback = BSR catback = Jetex catback) post about this exact thing on SS recently.<p>I want to add though, that the whistle completely went away after I installed the Ferrita DP (3" piping all the way).<p>
 

·
Registered
Joined
·
63,543 Posts
Re: Whistling noise @ 5000 - 5500 rpm (acg69)

acg69 said:
When I hit about 5000 to 5500 rpm's I hear a whistling noise that . <B>Maybe it has to do with the turbo pressure?[/</B>QUOTE]<p><br>Gee, ya think... <IMG NAME="icon" SRC="http://www.vwvortex.com/zeroforum_graphics/screwy.gif" BORDER="0"> along with a freer flowing air filter an exhaust and whatever else you did?
 

·
Registered
Joined
·
1,052 Posts
Re: Whistling noise @ 5000 - 5500 rpm (acg69)

Do you get the whistling noise only when the car is moving or does it happen even when you just rev the engine while at a standstill?
 

·
Registered
Joined
·
97 Posts
Re: Whistling noise @ 5000 - 5500 rpm (acg69)

I have the same thing. Sure got my attention the first time I heard it! I had the BSR PPC loaded for about a week before I mounted the exhaust - no noise at all. But when I installed the exhaust, I would get the whistle/screech sound up around 6K - only under heavy load/hard accel. Checked exhaust and down pipe for signs of leak or loose fitting or cracks, but all is tight. I was hoping to have Frank give a listen at the Carlisle show, but didn't get the time to go for a ride.<p>I haven't gone through all the intake plumbing yet to see if there is a loose clamp that might be letting air out under high boost. Is there a relief valve anywhere in the intake plumbing (other than the turbo bypass valve) that will bleed off pressure under overboost to prevent damage to I/C, etc??<p>I am still running the stock filter, so it is good to hear that the filter makes no difference - I had thought maybe the stock filter wasn't giving enough air.
 

·
Registered
Joined
·
96 Posts
Discussion Starter · #9 ·
I will probably replace the exhaust with the stock one and see if this is the culprit for sure.
 

·
Registered
Joined
·
96 Posts
Discussion Starter · #10 ·
It is the exhaust for sure. I just replaced the stock and the whistling is gone. Oh well... There goes the nice, bassy sound I got used to the last couple of weeks...
 
1 - 10 of 10 Posts
Top