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Recirculation valve/ BOV which way ?

 
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Dutch924-racer  



Joined: 23 Jul 2007
Posts: 993
Location: The Netherlands

PostPosted: Fri May 12, 2017 6:06 am    Post subject: Recirculation valve/ BOV which way ? Reply with quote

As I am running a 944 turbo I use an axternal recirculation valve/ BOV (from Forge).

On the internet I see two differant way's to mount it (boost in/out), is this the correct way or doesn't it matter ?


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937 trackday car
Series 2 engine
951S turbo and intercooler
937 DITC
Fast road camshaft
Forge recirculation valve + boost controller
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1522
Location: Somerset, UK

PostPosted: Sat May 13, 2017 2:34 am    Post subject: Reply with quote

Don't need a dump valve. Run a closed system
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1980 931 - forged pistons, Piper cam, CGT turbo, 951 ducted FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife LSD
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Dutch924-racer  



Joined: 23 Jul 2007
Posts: 993
Location: The Netherlands

PostPosted: Sat May 13, 2017 4:46 pm    Post subject: Reply with quote

The original turbo also has a built in recirculation valve/ BOV. Because the 944 turbo doesn't I use the Forge external one.
_________________
937 trackday car
Series 2 engine
951S turbo and intercooler
937 DITC
Fast road camshaft
Forge recirculation valve + boost controller
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Carrera RSR  



Joined: 08 Jan 2010
Posts: 1522
Location: Somerset, UK

PostPosted: Sat May 13, 2017 7:51 pm    Post subject: Reply with quote

Pressure in from below. Pressure out at the side. Vacuum/boost signal above. Forge say do not reverse the flow. Is that a pic of your forge BOV ?

Try it with and without BOV. They aren't always needed.
_________________
1980 931 - forged pistons, Piper cam, CGT turbo, 951 ducted FMIC, custom intake, Mittelmotor dizzy & cam pulley, H&S exhaust, GAZ Gold, Fuch'ed, Quaife LSD
Now www.924board.org/viewtopic.php?t=34690
Then www.924board.org/viewtopic.php?t=31252
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Dutch924-racer  



Joined: 23 Jul 2007
Posts: 993
Location: The Netherlands

PostPosted: Sat May 13, 2017 8:12 pm    Post subject: Reply with quote

ok, thanks so the pictue is telling it wrong

The picture above is not my recirculation valve but it looks simular, this is the Forge I use:


_________________
937 trackday car
Series 2 engine
951S turbo and intercooler
937 DITC
Fast road camshaft
Forge recirculation valve + boost controller
Back to top
View user's profile Send private message
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