dumping with no valve ?
Turbo Mini Forums

when my turbo kicks in and then change gear i get a real loud dump valve noise, funny thing is i dont have a dump valve
whats causing this?

is it the pop off valve in the plenum??

Everyone knows that instructions only have to be read if the thing doesn't work....

i really havent got a clue? the car gos ok

no , there is a pop valve in the plenum, if you have not done anything too it , it`ll be that ,

Everyone knows that instructions only have to be read if the thing doesn't work....

its all pretty standard so it must be that cheers

i thought that thing didnt kick in untill about 10psi or something though? mine did the same before i had a boost gauge or dump valve, turned out the pipe to the actuator was split and it was overboosting.....not good :(

by the feel of things i think its over boosting, will get it sorted

steve
there is a popet valve, small dump valve in the plenum budddy
layland, rover, fitted this as an added saftey device for over boost as well as serving for the above it cracks off at around 10psi
i blanked mine off, tapping this to
38"BSP (BRITISH STANDARD PIPE),
the hole left after removing the spring and the guts, happens to be the right dia for the tap to sail straight in
i fitted a hex taperd plug with some PTFE tape on to the seal it .
if you want a plug let me know but i cant send you the tap so you will have to cadge one, 2nd tap is sufficient
but some of the guys have diffrent ways of blanking it off
ie a lot stronger spring or haraldite, Ally weld it or what ever
do away with it or you will never be able to boost over 10psi ISH
search the threads on this site for "actuators" & "plenums"
BENROSS:

Edited by BENROSS on 22nd Jan, 2005.

cheers mate, i plugged the ecu pipe to stop/limit the boost, there must be a split some where, will get a boost gauge to sort it, im gonna leave that popet valve there until i got the readys to get a dump valve.

yup, ive got my dump valve on my plenum, blocked the standard thing off with a load of 5p's

i learnt it all the hard way
BOOST GAUGE ON A TURBO MOTOR IS EVERTHING

tried that bud666 but blew them out!

yup i also learnt that you need a boost gauge and a rolling road setup the hard way.

i'm only running 10psi max on this engine so the 5p's havent gone anywhere yet thankfully

I have had 5p's blocking my poped valve for the last 2 and a half years!!! no probs rerported from me!

that poppet valve sounds a good safety feature, im gonna leave it there, i dont plan to run higher than 10psi.

i used to get that noise on my 5 turbo and that had no dump valve at all, I was told it was the air travelling back through the turbo (stalling the rotor etc) and out through the air filter......