what are the pro`s and con`s of a dump valve please

[willie25]

i recently bought a forge dumpl valve atmospheric type since fitting it ive tried changing springs spacer etc,my car has been running like a bag of mince jerkey unresponsive etc,ive put the standard recirculating back in and its smooth again,is there any gains to a bov or im i just better sticking to the standard one,cheers.

 

willie.

[david_taylor]

I had a dump valve on my old RS Turbo, and to be honest I felt no difference.  I think you have to be running a really high boost for it to work properly.  Well you did on the Escort.

After a while the noise done my nut in and I took the valve off the car.

Never been tempted to put one on my Scooby after that.

Dave

[willie25]

I had a dump valve on my old RS Turbo, and to be honest I felt no difference.  I think you have to be running a really high boost for it to work properly.  Well you did on the Escort.

After a while the noise done my nut in and I took the valve off the car.

Never been tempted to put one on my Scooby after that.

Dave

 

cheers i think im going to keep it off now.its running much better now with it off i found myself reving the car to about 3.5k revs to blow it off.cheers[]

[stevie 4]

i had one on my old gt4 and when i took it off the car ran so much better i never put it back on my scoob has one fitted and seems to run good with it on so im going to leave it on.dump valve's are funny things some cars like them some don't. 

[willie25]

cheers, i keep chopping and changing my mind ive put a spring the equivalent tension as the standard one in the dump valve and going to try it again tommorow its pouring down now rubbish weather again[]