backwards dv

[dawson86]

been reading around, what differnce does it make if u reverse the dump valve? surely it cant be good for it?

 

[Steely]

ive ran a DV reversed for near 3 years, personally on a piston type its the more logical way to run it, where as with a diaphragm valve i would only run the oem way ,

Its only a tap, works either way

 

[dawson86]

so what is the standard bsche one? piston or diaghram?

 

[Steely]

so what is the standard bsche one? piston or diaghram?

diaphragm, piston types are best suited to reverse,

that shows how a piston reversed works

 

[Dan1720v]

I found mine would leak on spool up if reversed. And it affected dyno readings by nearly 20lb/ft

 

[dawson86]

which one can i get thats a piston then?

 

[Steely]

Forge 007p , forge 008, diaphragm valves do respond quicker though ,

 

[dawson86]

so in personal opinions which one is best? performance or sound wise? my oem bosche one sounds wicked and i guess does the job??

 

[traumapat]

Yep, does the job fine and needs no maintinance, unlike pistons which require yearly servicing although its not hard or expensive to do. Your choice

 

[Steely]

They're all good for the job. The stock bosch one is fine even at 300bhp plus, there's a few 400+ cars running stock valves. The forge ones are customisable with spring rates etc, I run a 007p in reverse so I can hear it dump slightly, ive never had an issue running it in reverse, it just seems more logical having the boost act on the piston end. And not on the side of the piston and 0-rings ,

Personal preference . They all do the job without issues !

Edit, beaten to it !

 

[dawson86]

i'll stick with the bosche one then, i done the n249 bypass and it dumps alot louder now, cheers for input guys, anyone else with any opionions on their DV setup

 

[traumapat]

Have you removed the felt bonnet liner ? Its mainly there for sound proofing and the car doesnt seem to suffer without it. That should increase the noise of everything under the bonnet.

 

[dawson86]

bit off topic lol, but nah i like the sounds as is, not too loud but still there i'll leave it alone for now

 

[Allan_84]

changed from piston 007p type dv to an APR R1 diaphragm dv.
respond quick.
nice sound, fitted in OEM way, and i have removed the plastic pipe from the airfilter to the front lights, and done the N249 delete.
dont have to maintain it like other piston types dv.

would recommend the APR R1 to any one.

 

[Russ 1.8t]

please excuse my ignorance, but what is an N249 bypass

 

[draky_uk]

and how do u do the N249 bypass

plus is it to reverse ur dv is it a case of turn it round and connect the pipes the other way

 

[traumapat]

please excuse my ignorance, but what is an N249 bypass

Theres a black container full of air which the ecu can use to activate the dv... removing it stops the ecu interferring. Ive never found it a problem. do a search on here for a guide.

 

[dawson86]

ave a look ere http://www.seatcupra.net/forums/show...t=n249&page=16

 

[nd-photo.nl]

Link is dead, error 404

 

[jase750]

They're all good for the job. The stock bosch one is fine even at 300bhp plus, there's a few 400+ cars running stock valves. The forge ones are customisable with spring rates etc, I run a 007p in reverse so I can hear it dump slightly, ive never had an issue running it in reverse, it just seems more logical having the boost act on the piston end. And not on the side of the piston and 0-rings ,

Personal preference . They all do the job without issues !

Edit, beaten to it !

having the boost pushing against the spring ??? So on full boost there's a chance of boost leaking past ?? They shouldn't be run in reverse .