Volvo Owners Club Forum - View Single Post - Engine: 70 T5:

dooby · Jun 16th, 2009, 00:21

Hi,

your car has a re-circulation valve fitted as standard. Fitting a dump valve or blow-off valve (same thing, I think?) will have no positive effect but if you like the noise it can be done. You need to remove the factory-fit re-circ valve if you do this, which can be fiddly :-)

HTH, Pete

PS If you want to hear more noise, you could try a freer flowing air filter in the stock air box, or go for a different intake system such as open cone or enclosed cone. This will allow more of the re-circ noise to come back up the inlet tract.

Jun 16th, 2009, 00:21	#2
dooby Forum Support Team Last Online: Jul 5th, 2019 16:11 Join Date: Mar 2006 Location: Cambridge	Hi, your car has a re-circulation valve fitted as standard. Fitting a dump valve or blow-off valve (same thing, I think?) will have no positive effect but if you like the noise it can be done. You need to remove the factory-fit re-circ valve if you do this, which can be fiddly :-) HTH, Pete PS If you want to hear more noise, you could try a freer flowing air filter in the stock air box, or go for a different intake system such as open cone or enclosed cone. This will allow more of the re-circ noise to come back up the inlet tract. __________________ '97MY black 855R M56H + Quaife Porsche/S60R BBK + XP8s, TD04HL-19T, 17"x8J Pegasus, THS intercooler, custom intake & RIP, Samco coolant, Koni/Nivo H&R, S60R manifold, TT-USB, Simota, IPD turbo back, IPD anti-roll bars & droplinks, IPD HT, MSD coil, Innovate LC-1, dimming mirror, Goodridge hoses, DOT5.1, V70 rear lights & handles, poly top bush & A arms & tie bar, strut brace, clear repeaters, 6k HID, catch tank, 2x rear brace