What Dump Valve to Fit? Recirculating or Twin Piston?

bar72 · Dec 19th, 2011, 21:51

hi all, new to the forum, just scored a 1998 S40 T4, was looking at R-Spec dump valves but unsure what the difference is between the R-Spec Recirculating Dump Valve or the R-Spec Twin Piston Dump Valve, the recirculating is more expensive but can someone help me with pro's 'n' con's of each, comes with the blanking plate from rspec.co.uk,

Code:

http://rspec.co.uk/dump-valves/r-spec-re-circulating-dump-valve-25mm-25mm

or

Code:

http://rspec.co.uk/dump-valves/r-spec-twin-piston-dump-valve-25mm

tnx in advance ;o)

strbryan · Dec 19th, 2011, 22:59

Your car has a recirculating dump valve fitted already..

pinhead · Dec 20th, 2011, 02:28

as said the t4 has a re-circ valve fitted as standard, this is what you blank off when fitting the dumpvalve

on mine i fitted the forge motorsport item, very good quality and not ridiculously loud

having just looked at the r spec item on their website, doesnt look like it comes with a blanking plate for the volvo re-circ valve, just a pipe block for other vehicles, also you'll require a pipe to t piece it into the intercooler pipework

the forge item comes with blanking plate, t piece, vac tubing and even cable ties for plug and play operation, took me about half hour to fit

bar72 · Dec 20th, 2011, 07:58

thanks for the info guys, i know absolutely nothing about turbo'd cars, what's the difference between single and twin pistoned valves, i believe that volvo's need a twin piston type? thanks

Dec 19th, 2011, 21:51	#1
bar72 Member Last Online: Jul 27th, 2014 17:59 Join Date: Dec 2011 Location: Cupar View Photos By: bar72	What Dump Valve to Fit? Recirculating or Twin Piston? hi all, new to the forum, just scored a 1998 S40 T4, was looking at R-Spec dump valves but unsure what the difference is between the R-Spec Recirculating Dump Valve or the R-Spec Twin Piston Dump Valve, the recirculating is more expensive but can someone help me with pro's 'n' con's of each, comes with the blanking plate from rspec.co.uk, Code: http://rspec.co.uk/dump-valves/r-spec-re-circulating-dump-valve-25mm-25mm or Code: http://rspec.co.uk/dump-valves/r-spec-twin-piston-dump-valve-25mm tnx in advance ;o) Last edited by bar72; Dec 19th, 2011 at 21:53.

Dec 19th, 2011, 22:59	#2
strbryan I've Been Banned Last Online: Nov 2nd, 2016 18:20 Join Date: Nov 2006 Location: Coppull View Photos By: strbryan	Your car has a recirculating dump valve fitted already..

Dec 20th, 2011, 02:28	#3
pinhead Master Member Last Online: Apr 18th, 2017 22:38 Join Date: Aug 2011 Location: na	as said the t4 has a re-circ valve fitted as standard, this is what you blank off when fitting the dumpvalve on mine i fitted the forge motorsport item, very good quality and not ridiculously loud having just looked at the r spec item on their website, doesnt look like it comes with a blanking plate for the volvo re-circ valve, just a pipe block for other vehicles, also you'll require a pipe to t piece it into the intercooler pipework the forge item comes with blanking plate, t piece, vac tubing and even cable ties for plug and play operation, took me about half hour to fit

Dec 20th, 2011, 07:58	#4
bar72 Member Last Online: Jul 27th, 2014 17:59 Join Date: Dec 2011 Location: Cupar View Photos By: bar72	thanks for the info guys, i know absolutely nothing about turbo'd cars, what's the difference between single and twin pistoned valves, i believe that volvo's need a twin piston type? thanks

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