atmospheric or recirculating?

[Dave cook]

i'm not sure what sort of dump valve to go for
atmospheric or recirculating.
any ideas

[kwlw]

i'm not sure what sort of dump valve to go for
atmospheric or recirculating.
any ideas

If you are using stock engine ECU, then better is to use recirculating.

Sau

[Bibby]

Aye, if the valve and MAF are in the usual places you will need a recirculating valve. Otherwise there will be a difference between metered and actual air intake.

[rotoryboy]

and do you really want the chav pfsst pfsst pfsst pfsst pfsst pfsst pfsst

[S2central.net]

Modified or not I would take a recirculating valve (sometimes two are needed on big breathing engines). I don't see any advantage in an atmospheric dump valve... In fact there are performance advantages with the recirc one.


Paul

[Dave cook]

a recirc it is!
cheers for the advice

[kwlw]

and do you really want the chav pfsst pfsst pfsst pfsst pfsst pfsst pfsst

For sure . I have an atmospheric pop off valve even with the whistle - just to make it louder .

Riceboy Sau
P.S. However forge DV is installed in the turbo car

[rotoryboy]

I have an atmospheric pop off valve even with the whistle - just to make it louder .

[kwlw]

You can laugh, but I really have one. Bought for 20 euros in Germany . Have no idea why . Maybe because I like supra sound on the gear shift .

Sau

[Ski]

"I don't see any advantage in an atmospheric dump valve" dosnt it let pressure out of ur turbo or something stoping it overloading/blowing?

[Billman]

I have put a cone filter on my car and the sound is amazing! Is like those Sport Quattro sounds that you heard on throttle off! The noise was also with the original filter there but now it is much much louder!

Greetings

[S2central.net]

"I don't see any advantage in an atmospheric dump valve" dosnt it let pressure out of ur turbo or something stoping it overloading/blowing?

Don't misquote me - it was in comparison to a recirculating dump valve.

Turbo engines need a dump valve to prevent turbo stall and possible damage between high boost gear changes.

I just think atmospheric DVs are flawed because the undo the work that the engine has done sucking air into the engine - the recirculating TBV is much more elegant in that it flows any remaining boosted air towards the compressor wheel between gear changes - reducing spool time for the next gear change.

[WabTheKing]

You can laugh, but I really have one. Bought for 20 euros in Germany . Have no idea why . Maybe because I like supra sound on the gear shift .

Sau

same as mine only mine has a blue top

regards
will

[Ski]

So whats the standard s2 wastegate, is that a posh name for atmospheric dv ?

[Dave cook]

standard S2 has a recirc fitted benind the left headlight