Hi, new to this. Just was wondering if the dump valve is supposed to be released by the clutch or the release of the throttle??

Mine is throttle but some people say by clutch..

Anyone tell me this??

Is mine wrong or does it not matter??

Cheers

Carl

 

it`ll do its stuff when you`ve been on boost and shut the throttle

 

thanks for the fast reply. Much appreciated.. At least i know it aint broken..

 

no problem and its got nothing to do with the clutch at all.. dunno where they got that idea from

 

The dumpvalve is released by the vacuum in the inlet when you shut the throttle. So long as you have been on boost and you then release the throttle the vacuum will then suck the diaphram off the dumpvalve and then release the excess boost pressure. Nowt to do with the clutch

 

Just a another 1.. Is the valve supposed to be open when engine is running??

Mine is open(idle) and shuts when revs are put on. And obviously open's when on boost.

 

Yep sounds normal to me

 

Just took her to a shop to see about upgrading..

And he said let me have a look what you got.. Rev'd engine did some stuff and said your dump valve is dirty and shouldnt be doing this... he said it doesn't seem to be letting out the air.

Being a little unsure of what to do. I put the question out..

Do i need a new one? or is he trying to get my custom??

 

does yours do the same as this one..

YouTube - Subaru Impreza dump valve

if so then its ok, and yes somtimes they do need cleaning

 

Take it off and put it in the bin.

 

tbh thats the best idea, i used to run a forge VTA on my old car but i`ve kept the standard one on my new ra and its smoother to drive

 

Yes but stays open when idle..

Getting a new one 2 morrow to be on the safe side

 

I would put a standard one back on made a massive difference to my car so much smoother.
I have one that would fit your car PM me if your interested.

 

Yeah it should be in the open position when at idle as there will be vacuum in the inlet manifold. As soon as the pressure in the manifold comes positive then the valve will close and therefore hold boost

 

YouTube - Bailey Dump Valve (KNACKERED)??

Knackered???

 

The car I bought had a dump valve on. Who knows if it was a contributing factor as it was sticking, but the engine was shot. Told the garage to rip if off and bin it