Loud blowoff valve

[Rusty]

I ran a GFB adjustable valve for a bit and the car ran ok with it on minimum vent to atmosphere but it wasn't as good as a recirculating valve and was crap on full atmosphere, so I sold it and refitted my Forge 007. You can increase noise with airbox mods or a cone filter

[JP]

I use a stock 710N that dumps to atmosphere as my MAF is on the pressure side near the throttle body it doesn't effect fuelling.

Between the straight through 3" sidepipe with no mufflers the screaming whistling of the induction through the turbo and a blow of sound so loud it scares the pants of the idiot women driver in the convertible infront of you there is absolutely no subtlety at WOT.

However drive normally and the 3" bypass closes and goes through stock backbox. The turbo doesn't need to make positive pressure so all induction whistling and noisy dumps (sniggers) dissapear into a stock sounding luxury motor. So family sleeper by weekday and raging monster on trackdays. Best of both worlds but took a lot of effort to make it all work properly without effecting the running of the car.

[|CL|NIKI]

OK, that explains quite a bit. This may be a stupid question but are there any loud recirculating valves?

Verno che si nov no v Bg ima mnogo hora koito biha ti pomognali.

When/If You put Maf after turbo - You can put very loud BOV, when is it on a stock place - just forget about any changes/repairs . For stock car up to 300 engine Hp its not necessary anything stronger/harder/forged/expensive/race/tuned than what is on the car. I was with stock rods/pistons up to 500hp. They(pistons) will handle even more.
Cheers mate.

[Big Lee M]

You could use a Forge splitter valve, the are atmosheric and recirculating and you can change them 25/75 and though to 75/25 so it won't mess with the car. Nothing wrong with a valve if they sound good, each to there own I bet a lot of people who say they are chavy and ricer have had one at some point!

It won't mess with the engine management system at all. You can fluctuate it between 25% and 75% either way

[rs2coupe]

Try this..... Perfect!

http://www.ebay.co.uk/itm/SABRE-EDV-...item4ab59d634b

I shouldn't be surprised at the **** people can buy these days

[QuattroFever]

I see your quite new and not meaning to sound patronising. If you know already ignore this.

A turbocharged car forces air into the engine creating positive pressure in the whole inlet. When you lift off the vacuum the engine makes between it and the throttle body pulls the piston/diaphragm back on the dump valve/bov/tbv releasing the excess pressure that still remains in the intake.
It is this release of pressure that makes that woosh sound you're talking about. So it's not whether you can can get a valve that makes the noise as by the nature of what they do they all make that noise depending how you have your intake set up.

You can make the standard one noisy if you get creative

[driftin jo]

If you really must fit one then my advice is remove the throttle damper, this will allow the idle switch to be activated as soon as you shut the throttle, if the engine is above 2000 rpm when the switch is activated the ECU will turn off the injectors and thus will not over fuel any more.

Under 2000 rpm lift off you will still get over furling but obviously this will not be as bad as lifting off under full boost at 5000 rpm +.

With the damper fitted as standard it can take 1-2 seconds after you lift off for the switch to click.

[Deception]

Already explained above.



Any valve you use needs to recirculate the bypassed air back into the intake track. If you use an atmo BOV whenever you lift off or change gear the MAF has already "told" the ECU to fuel for that air mass, which is no longer in the intake track, hence it overfuels. HTH

OK, that explains quite a bit. This may be a stupid question but are there any loud recirculating valves?

[Error404]

Already explained above.

It's not a good idea to fit an atmospheric BOV to your car unless you are running an after market ECU, the standard motronic system is MAF based and if you dump to atmosphere the car over fuels when you change gear and you will get bore wash etc, not good.

Any valve you use needs to recirculate the bypassed air back into the intake track. If you use an atmo BOV whenever you lift off or change gear the MAF has already "told" the ECU to fuel for that air mass, which is no longer in the intake track, hence it overfuels. HTH

[Deception]

Thanks guys. I wasn't ware that a BOV would mess with the engine.
So what makes the HKS SSQV compatible with the AAN MAF and the other BOVs not?

[popdemonic]

I had HKS SSQV on my car few years ago.It's sequential with small and big valve inside.No stalled engine on MAF engine on UrS6 like you will experience

on any other BOVs.Beware of fake HKS since there will be a ton of them on ebay.Anyway,you might have fun with with them for a few months and started

to annoy you afterward.

[fish]

Why on earth would you want your quality automobile to sound like it´s got a cold? Thos ricer dumps soud rally chavtastic to me... If you want some dump nois, shove a cone filter on it. It wont be as loud, but you get some nois and if you run a bit of boost with the 26/27 it will sound pretty cool. I had a 26/27 on my inca orange S2 and ran 1,9bar of boost with a dahlbäck kit and it sounded pretty cool...

[Ruffiano]

http://www.youtube.com/watch?v=iDW71bm4C8Q

you can hear mine pretty well, i have scared quite a few people that were walking down the street, all mine is is a forge DV that isn't re-circulating since i don't have a stock inlet hose.

[Error404]

The answer is in the title - use an HKS super sequential valve. You can use a recirculating outlet on it, but it won't be as loud. The HKS are really good quality adjustable units, but expensive. As above, why would you want to though? Very chav IMHO.

[driftin jo]

Try this..... Perfect!

http://www.ebay.co.uk/itm/SABRE-EDV-...item4ab59d634b