dump vales ect?????????

shauny · Nov 27th, 2007, 21:45

I have just got a 98 S40 T4 and i was thinking of fitting a dump valve or some sort of blow valve.. Any recomendations?? Or should i just leave it all alone ??

loopy · Nov 27th, 2007, 22:56

hi mate iv got a bailyes twin piston on mine and its loud u need to buy a blanking plate from forge motor sports and a universal t peace i got all the stuff for £120 and fitted it my self take a look it well worth it

Dandle · Nov 27th, 2007, 22:57

I wouldnt bother the way the ECU is mapped the car will run rich each time the dump valve operates and that isnt ideal for the engine. Fit a cone filter and you can here the standard recirc valve anyway apparently.

loopy · Nov 28th, 2007, 19:54

iv had mine on a year no problems and just with a k/n induction kit and s/s cat back exhaust and a mbc set at 14 psi she runs 245.5 bhp and 252 lbft torqu with the dump valve. it done to personal chose i love it so if u want the noise go for it as far as the ecu not running proply mmmmmmmmmm mine runs fine thow

Dandle · Nov 28th, 2007, 21:32

It will still run fine but evertime air is dumped the car will run rich for a moment. Its not the best thing for it and not mapped for the loss of air.

smartbomb · Nov 28th, 2007, 22:15

I have a Blitz atmospheric dump valve on my T4 and it runs fine.

Paul

Rooster · Nov 29th, 2007, 00:13

I've had a dump valve on mine since i got it and its never hurt it, altho am running recirulation valve on turbo and a dump valve cos been a phase 2 it wouldn't idle right,

Does it matter if it runs rich, it will help cool combustion chambers and if its decatted might even pop flames on gear changes altho mine never has

pyaap · Nov 29th, 2007, 00:20

I think as long as its a twin-piston dump valve, you should be just fine. As already mentioned, the occassional "rich running" period when upshifting does not really do the engine any harm; the worst that will happen is it will throw the engine management light with a DTC (bank X running rich etc.) which may need to be reset.

shauny · Nov 29th, 2007, 21:49

Thanks all for your help. Were is the best place to get a twin piston dump vave??

loopy · Nov 29th, 2007, 22:11

ebay for £130 all the kit go to styling and performance s40 volvo it on there the blanke plate and t peace and twin piston dump value forge

Nov 27th, 2007, 21:45	#1
shauny New Member Last Online: Apr 14th, 2008 20:34 Join Date: Nov 2007 Location: swindon View Photos By: shauny	dump vales ect????????? I have just got a 98 S40 T4 and i was thinking of fitting a dump valve or some sort of blow valve.. Any recomendations?? Or should i just leave it all alone ??

Nov 28th, 2007, 19:54	#4
loopy Senior Member Last Online: Apr 21st, 2012 19:45 Join Date: Sep 2006 Location: newport View Photos By: loopy	iv had mine on a year no problems and just with a k/n induction kit and s/s cat back exhaust and a mbc set at 14 psi she runs 245.5 bhp and 252 lbft torqu with the dump valve. it done to personal chose i love it so if u want the noise go for it as far as the ecu not running proply mmmmmmmmmm mine runs fine thow __________________ www.southwalesvolvos.com

Nov 29th, 2007, 00:13	#7
Rooster Speed freak Last Online: Apr 3rd, 2020 22:04 Join Date: Nov 2003 Location: Yorkshire	I've had a dump valve on mine since i got it and its never hurt it, altho am running recirulation valve on turbo and a dump valve cos been a phase 2 it wouldn't idle right, Does it matter if it runs rich, it will help cool combustion chambers and if its decatted might even pop flames on gear changes altho mine never has __________________ 04 XC90 D5 --- Big bus 00 pug 306HDi --- Run about 88 pug 309GTi --- Project track car 07 CB600 Hornet --- 2 wheel fun

Nov 29th, 2007, 00:20	#8
pyaap Non-T4 T4s RULE!!!! Last Online: Mar 29th, 2017 11:24 Join Date: Nov 2002 Location: Bristol / Bath	I think as long as its a twin-piston dump valve, you should be just fine. As already mentioned, the occassional "rich running" period when upshifting does not really do the engine any harm; the worst that will happen is it will throw the engine management light with a DTC (bank X running rich etc.) which may need to be reset. __________________ "An Engine Which Runs Lean Lives on Borrowed Time" http://www.volvoforums.org.uk/showthread.php?t=13998

Nov 29th, 2007, 22:11	#10
loopy Senior Member Last Online: Apr 21st, 2012 19:45 Join Date: Sep 2006 Location: newport View Photos By: loopy	ebay for £130 all the kit go to styling and performance s40 volvo it on there the blanke plate and t peace and twin piston dump value forge __________________ www.southwalesvolvos.com

Nov 27th, 2007, 22:57	#3
Dandle Master Member Last Online: Dec 29th, 2013 22:39 Join Date: Dec 2003 Location: Ashford	I wouldnt bother the way the ECU is mapped the car will run rich each time the dump valve operates and that isnt ideal for the engine. Fit a cone filter and you can here the standard recirc valve anyway apparently.

Nov 28th, 2007, 21:32	#5
Dandle Master Member Last Online: Dec 29th, 2013 22:39 Join Date: Dec 2003 Location: Ashford	It will still run fine but evertime air is dumped the car will run rich for a moment. Its not the best thing for it and not mapped for the loss of air.

Nov 28th, 2007, 22:15	#6
smartbomb VOC Member Last Online: May 4th, 2011 11:56 Join Date: Dec 2004 Location: Mansfield	I have a Blitz atmospheric dump valve on my T4 and it runs fine. Paul

Nov 29th, 2007, 21:49	#9
shauny New Member Last Online: Apr 14th, 2008 20:34 Join Date: Nov 2007 Location: swindon View Photos By: shauny	Thanks all for your help. Were is the best place to get a twin piston dump vave??

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