can you get dumpvalves for superchargers? i'd love one for my mini but struggling to find any info on them really..

two mins on google and just come across this only had quick read
[URL="http://www.mini2.com/forum/engine-drivetrain-tuning/8050-supercharger-blow-off-valve.html"]http://www.mini2.com/forum/engine-drivetrain-tuning/8050-supercharger-blow-off-valve.html[/URL]

ahh cheers, looks like i cant get one anyway
guess ill have to stick to making the noise myself

duno if its the same as the G60 but u can blank the boost return off, and this will give you the chavvy ttssshhhhh but its not healthy for the charger and every 100miles u gotta squirt lube in to the charger.

I think you can get a different belt+pully which gives a slight performance boost also you'll hear the whine abit more

Also supercharger whine is much much cooler than any dumpvalve

http://www.minimania.com/ArticleV.cfm?Di...ory=ENGINE

Roots style superchargers like what is fitted to the Mini don't need blow-off valves like a turbo car because of the difference in where the throttle body is.

On a turbocharged car, the throttle butterfly is downstream of the turbo, so when you lift off the throttle, the pressurised charge is effectively sandwiched between the closed throttle and the turbo. The blow-off releases this pressure to atmosphere.

On a roots-style supercharged car the throttle body is upstream of the supercharger. This means that when you lift off the throttle and blower slows down with the engine, whatever pressurised charge is left over simply enters the engine as normal. This is why supercharged cars are so much more responsive than turbos, because every ounce of compressed air is used instead of being dumped to atmosphere whenever the throttle is reduced.

The only exception to this is when a centrifugal supercharger is used. This is effectively a belt driven turbo, like a Paxton or Procharger that are popular with Mustang owners. These work in the same way as a turbo and dump to atmosphere.

Your only option is as mentioned earlier. There will be a boost return somewhere attached to a bleed valve that stops the supercharger from over boosting, and relieves any excess pressure in situations where the supercharger clutch is disengaged such as rapid decelaration or sitting in traffic. Blocking this off would cause a pressure build up and possibly find it's way back out through the air filter but it sounds like a very effective way to fook up your car to me.

you know far too much dude

we should have a QUESTIONS and ANSWERS forum and employ you to answer peoples car queries

Depends what the pay's like!

Supercharger dumpvalve, I should bitchslap you ass.

Dumpvalves are for gheylords, supercharger whine is for winners

heh, apparantly if you get a panel filter for them they whine even louder, may have to get one

a panel filter not make hardly any difference, ive got an induction kit on mine, and my m8s got the standard air box on his, and they sound the same.