I think I know how they work, but it confuses me a little

Below the standard big piston is a smaller spring and a smaller piston.

I take it that the vacumn that sucks the big piston open at idle cant suck the smaller one open too, hence why it dont stall.

But why cant it? Secondary piston and spring are both far weaker than the main one.

Me mildly confused

 

Is this like aftermarket cossie cam lift and duration, nobody actually knows

 

Its a mainly cossie forum, we all HATE dump valves, try asking on a scooby forum its probably the one thing they actually understand technically

 

i doubt that TBH mate

 

well, relatively

 

Vacumn on both sides.

Stong on TB side - Opens main piston.

Weak on IC side - small piston closes under weak spring pressure - blocks hole that would normally vent air.

WD

 

why do all cossie owners hate dump valves i remember back in the day it was all the rage no self respecting turbo owner be seen dead without one

 

Anondiesed forge ones from the demon tweeks catalogue or Revs magazine circa 1999

 

only cause they didnt know what would make the car chatter

 

My wastegate sounds well phat man init, WIKID

 

whats a wastegate?


i thought were on about dump valves

 

whats a wastegate?


i thought were on about dump valves

 

he was taking the piss.

as people call chatter "wastegate chatter" even tho its owt to do with wastegates

 

this is a wastegate

 

whats that just looks like one dirty hole, bit like the big bird flashing her growler on sat night