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new whistling sc
Posted: Thu Sep 27, 2012 11:39 pm
by Speedin Demon77
Just did lim and ported sc. Some tune and general maintanance. Anyways runs great but there's an obnoxiously loud whistling. Going to change pcv tomorrow. Any ideas what would cause this? Its really effing loud. ;(
Re: new whistling sc
Posted: Thu Sep 27, 2012 11:44 pm
by 01bonneSC
Who ported the SC? THeres something with the silencer ports IIRC....
EDIT: I guess its if you block them off it gets loud. But yes the PCV is a good place to start.
Re: new whistling sc
Posted: Thu Sep 27, 2012 11:45 pm
by 00Beast
If you fill the silencer ports it SCREAMS when you get on it. Sounds like a boost leak somewhere...
Re: new whistling sc
Posted: Thu Sep 27, 2012 11:48 pm
by 01bonneSC
Ford DOHC V6s had a big whistling problem and it was the PCV system.
Re: new whistling sc
Posted: Fri Sep 28, 2012 12:07 am
by Speedin Demon77
Under 2k its a loud whistle. Not supercharger scream or anything like that. Above 2k its gone then u just hear the school
loving that btw. Did an Intense intake too. Sounds like a shop vac now lol.
Re: new whistling sc
Posted: Fri Sep 28, 2012 12:27 am
by 00Beast
Who ported your housing?
Sounds like a vac leak, which could also be PCV. Check all your lines and the PCV for the o-rings, and that the valve rattles.
Re: new whistling sc
Posted: Fri Sep 28, 2012 3:34 am
by Speedin Demon77
Valve rattles but seemed to be able to blow through both ways? Should be a one way valve right? The sc porting was intense. Very nice work. I've never heard a car with such a loud whistle before tho.
Re: new whistling sc
Posted: Fri Sep 28, 2012 12:22 pm
by 00Beast
I'm not sure to be honest. They're like $2 at any auto parts store, just get a new one. You have the o-ring on there properly, along with the gasket for the cover, correct?
Re: new whistling sc
Posted: Sat Sep 29, 2012 12:41 pm
by Speedin Demon77
Ok. Its not the Pcv. Noticed the boost gauge pegs all the way negative during the whistle and it does.fluctuate during the whistling. Any ideas?
Re: new whistling sc
Posted: Sat Sep 29, 2012 1:14 pm
by 01bonneSC
Spray some carb clean around too see if there's a vacuum leak.
Re: new whistling sc
Posted: Sat Sep 29, 2012 1:36 pm
by Speedin Demon77
Acted a Lil funny behind the wastegate control.
Re: new whistling sc
Posted: Sat Sep 29, 2012 1:37 pm
by Speedin Demon77
Maybe the gasket between the upper plenum and the lim?
Re: new whistling sc
Posted: Sat Sep 29, 2012 1:44 pm
by 01bonneSC
Did you check the supercharger and LIM for flatness with a straight edge before you put them together?
Re: new whistling sc
Posted: Sat Sep 29, 2012 2:13 pm
by Speedin Demon77
Both flat. Small leak behind the bca between the upper plenum and the lim.
Re: new whistling sc
Posted: Sat Sep 29, 2012 5:10 pm
by 01bonneSC
All your vacuum tubes uncracked around there?
Re: new whistling sc
Posted: Sat Sep 29, 2012 7:26 pm
by Speedin Demon77
Lines are good. Seems to new hairline leak on the upper, lim gasket. Trying high torque gasket sealant. If it cures and works by tomorrow were good. Otherwise I'm decking the school plenum. And if I do that I'm porting the lim
Re: new whistling sc
Posted: Sat Sep 29, 2012 7:46 pm
by 01bonneSC
I would have tried a new sc gasket. Did you follow the torquing sequence for the charger properly?
Re: new whistling sc
Posted: Sun Sep 30, 2012 10:26 pm
by Speedin Demon77
Everything is good. Sealant worked. Going to machine it down next chance I get. Love the vacuum sound at idle and really love the way it screams now when you really get on it
replacing the radiator Monday then GXP sways. New rear shocks. Modded puck mount. Then I should be good. Big thanks to John at Intense. Great customer service.