Engine: 70 T5: - Should i fit a dump valve or a bov?

T5 GAV · Jun 15th, 2009, 21:46

Hi all,
I'm recently bought a 1997 S70 T5 having never had a volvo or a turbo engine before so i'm sorry if i'm asking stupid questions here, but here goes.
Will a dump valve or blow off valve help the efficiency and/or reduce wear to my turbo or engine and if so, which should i fit?

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.

smartbomb · Jun 17th, 2009, 00:38

Hi Gav. If your car is an auto then it's totally pointless fitting an atmospheric BOV. If you're just after the noise, then fit an open cone filter in place of the standard airbox.

Cheers
Paul

MANSFIELD FTW!!!

T5 GAV · Jun 17th, 2009, 19:59

i really don't want the noise, it sounds crap imo, i just wanted to preveny any unnecisary wear to my turbo. i spoke to a friend at work today who knows about turbos ( cos i know nowt about em) and he said the only way to kill a turbo is through dirty oil or by oil starvation from not leting it idle for a bit before i turn it off. I decided to leave it as it is as a result, but thanks for your replies.

Silverbrick · Jun 18th, 2009, 20:31

Quote:

Originally Posted by T5 GAV

i really don't want the noise, it sounds crap imo, i just wanted to preveny any unnecisary wear to my turbo. i spoke to a friend at work today who knows about turbos ( cos i know nowt about em) and he said the only way to kill a turbo is through dirty oil or by oil starvation from not leting it idle for a bit before i turn it off. I decided to leave it as it is as a result, but thanks for your replies.

The best idea

I did a bit of fiddling with an Impreza Turbo I had, before they became chavvy

, and the "chissing" of even the standard DV was bloody irritating after a very short while

Don`t put any Slick 50 in either, I`m convinced that killed a Turbo on my RS Turbo by blocking the oilway

Jun 15th, 2009, 21:46	#1
T5 GAV Is the bestest. Last Online: Apr 25th, 2014 13:54 Join Date: Jun 2009 Location: Clydebank	Should i fit a dump valve or a bov? Hi all, I'm recently bought a 1997 S70 T5 having never had a volvo or a turbo engine before so i'm sorry if i'm asking stupid questions here, but here goes. Will a dump valve or blow off valve help the efficiency and/or reduce wear to my turbo or engine and if so, which should i fit?

Jun 16th, 2009, 00:21	#2
dooby Forum Support Team Last Online: Jul 5th, 2019 16:11 Join Date: Mar 2006 Location: Cambridge View Photos By: dooby	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

Jun 17th, 2009, 00:38	#3
smartbomb VOC Member Last Online: May 4th, 2011 11:56 Join Date: Dec 2004 Location: Mansfield	Hi Gav. If your car is an auto then it's totally pointless fitting an atmospheric BOV. If you're just after the noise, then fit an open cone filter in place of the standard airbox. Cheers Paul MANSFIELD FTW!!!

Jun 17th, 2009, 19:59	#4
T5 GAV Is the bestest. Last Online: Apr 25th, 2014 13:54 Join Date: Jun 2009 Location: Clydebank	i really don't want the noise, it sounds crap imo, i just wanted to preveny any unnecisary wear to my turbo. i spoke to a friend at work today who knows about turbos ( cos i know nowt about em) and he said the only way to kill a turbo is through dirty oil or by oil starvation from not leting it idle for a bit before i turn it off. I decided to leave it as it is as a result, but thanks for your replies.

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