Okay, my missus heard her first dump valve the other day in B&Q car park, I must admit it wasn't over the top and it was a sweet Hisss of pressure release.

I felt a tw@t coz she asked what exactly does it do.

I spouted some crap about it releasing pressure from the turbo and therefore prolonging the turbos life.

Tell me, exactly what does a dump valve do?

For a nice sounding and reputable one what should i pay?

With these answers i'll look a smart **** next time she asks.

While we are on the subject, i don't know what the missus has been taking but she wants a LOUD back box and de-cat centre to get an extra 15-18 bhp and then she said we could save up for a full de-cat

Amazing! its moments like this that stop you questioning WTF you got married.

Just waiting for the BITE now could cost me a new car for her

 

LOL

Baily /forge DV - £100 or so, discrete & reliable.

HKS SSQv - £250 or so, loud as **** and great fun (well worth the money IMHO or if you can get one 2nd hand so much the better!)

Decat - I went for a TSL Group A downpipe, HKS centre section, HKS Hiper backbox. Combined with a K&N 57i induction kit, the car hissed, popped, banged and roared away and made the most amazing high pitched sqealing hissing noise on back off

God I miss it!

 

Ive got an hks dv great fun going past bus stops.....

 

Okay so Bailey DV seems a safe bet but why is HKS £150.00 more

And what exactly will either of these do to benefit my car in performance or lengthening the life of the car

 

HKS is worth every penny of the extra money, HKS only vents when it detects a change in vacum, therefore it doesn't allow vacum to pull the valve open on idle unlike cheaper valves. Also with the HKS you can get 3 different inserts and change the sound it makes, you can also get a recirculating adaptor if you are shy. I'm currently using the silver insert and not only does it make a subtle venting noise, it can also be made to chirp, sounding quite rally style

Blitz SS and DD are also good valves, they can be adjusted to close on idle to save any dodgy stalling idle probs. Just crack the 10mm lock nut and turn the hex key on top of the valve until the piston closes at idle.

Bailey makes your car sound like an RS Turbo (ttchissh), yuk

 

James

HKS does certainly sound the dogs danglers of DV's so i may well take your advice.

I would get the best deal from........................

 

Put VERY simply,

When you accelerate hard and your turbo is boosting, if is basically forcefeeding your engine with air. When you lift your foot off the throttle pedal, the butterfly in the inlet closes, therfore restricting airflow into the engine. Your turbo is now trying to shove air in against a "brick wall" that is the throttle butterfly, so because there is more resistance, pressure builds up and causes the turbo impeller to slow down. The dumpvalve diverts this "trapped" air and either dumps it back into the inlet (before the turbo)or fires it out to atmosphere (depending on type of DV fitted). Hence you get the whoosh. This stops the turbo slowing down which theoretically means that your turbo will still be spinning nice and quick when you are back on the power. It protects your turbo by not letting it have to work as hard squashing up the air behind the closed butterfly.

I've tried to make that simple enough.

P.S. if you want LOUD.. Turbosmart. HKS is a mousefart in comparison.

Cheers

Rich

 

Cheers Rich

I dont want a big mad granny killer. A sweet hisssss would suffice i think

For now anyway