turbo went today, they said over the phone that i must run a dump valve,
i prefer chatter but understanderbly i would rather have dump valve then
rather go throught the rigmorole of changing a turbo every 3 months,

does any one sell dump valves that are quiet or recirculate as i prefer chatter

cheers troops

 

yep bailey do recirculating dump valves. do you run efi?

 

no standard mfi, K.E runs lot better with out a D/V

 

i want to remove my dump valve, would i get chatter on standard boost? on mfi?

 

wont a recirculating dump valve get rid of the chatter? cos chatter is back pressure on the compessor wheel? so and recirculating valve will not put it to atmosphere but put it bk into circulation rather than allowing bk pressure?

 

you require efi for chatter

 

Yo Andy, yup u defo need a dump valve as you are running very high boost.

 

Andy i hate dump valves and was gonna take mine off my s1 its a 1.9 with all the trimmings and a stage 2 hybrid but after reading this im just going to leave it on mate.

I think its worth loosing the chatter and putting a DV on if its gonna stop blowing your turbo

 

how do you get chatter?

 

i dont have EFI and i get "chatter"(compressor stall to be precise!)

 

thats wot i want lol is chatter n compressor stall different sounds then?

 

granted it's not as loud as you get with efi, but it's still loud enough to make people turn and look!!

 

I'm running 14psi on a 2.0 zvh, i've just removed the dumpvalve is this gonna cause any damage to my turbo over time? If it is then i will refit it, but would rather not.

Cheers, Mark

 

leave the bugger off if your only running 14psi dude!! in boost terms 14 is not a lot

 

will i get much noise from 11.6psi 0.8bar? without a dumpvalve?

 

doubt it very much mate

 

no lol

 

Im running 16psi, with chatter (on full load) other then that D/V or not its personal taste.

 

What?!

PMSL


What turbo do you have? Need a dump valve


None of my mates use a dump valve on their cars and they don't chew up turbo's like they are going out of fashion. Mr C runs 28psi held on a GT turbo and has no trouble.

 

yeah agree with tony, sounds like complete rubbish needing a DV unless running silly high boost. Especially on MFI....

leave the DV off IMO.

 

To be honest mate, it's not rubbish. It's all about minimising risks and mechanical sympathy.

 

Serious? I mean I thought legend had it that T4 and above needed a d/v, I know this is RST terms...but surely u don't need a d/v....tbh how many turbo's is this you have gone through now in x amount of months? Doesn't sound right....

 

But c'mon, I know cars that have done 100,000 + miles and the turbo's are still going. A couple have been running 20+ psi all their lives.

 

25psi on mine and it hasn't spat the turbo out. Sound like they are fishing for a get out

 

i was told by ahmed bayjoo that unless you are running a t4 the t series turbos dont need a dump valve because they dont produce much back pressure.. i fooking hate dump valves but i have to run a valve on my gt series tubo , because of the ball bearing core the shaft is very thin and vince @ universal turbos has seen compressor wheels break from there shaft.. i'm going to run 29psi so i use a tial blow off valve which sounds ok

 

i personally dont have a d/v but i do agree with what Rick said!

 

the turbo is a stage 2 turbo technics, still t3, now, i ran with out a d/v
for a month and preferred it, ran a lot better and seemed to pick up a lot
quicker, the car is running 21psi, now i get told different things all the time,

technics say i MUST run one but like you say, C & B run with out one,
the oil line has been tested and is pushing out 58psi, engine is 8k old and
everything new, i.e, hoses, oil feed pipe, i have bought a bailey
breather to fit once turbo back on, i dont want a dump valve.

 

this will be my 6th

but the first 4 were dodge and were not good as soon as they were fitted
to the car, they were done by a local firm, turbo force, aka turbo farce, LOL,

they alll had inbalanced shafts and could not take the high RPM

 

well i suppose it wont hurt to use one just to see if thats the reason you are going through turbos

 

I think they are talking out of their arse. I ran 21psi on a stg2 for a matter of weeks before I got bored an went to a stg3 with 24psi, then my conrod snapped

 

my daily runner runs 12psi on mfi and i get quite chatter but it is enough to make people look (standard turbo)

on my weekend escort, im running 21psi on a full worked stage 3 with out a dump valve with out any probs. tryed it with a dump valve, it made absolutly no difference.

you cant use a recirculating dump valve with mfi as it will confuse the metering head and technicaly make a massive air leak!!!!

you defo dont need a dump valve!

 

well whilst they fix it, i might get it upped to stage 3

 

you can use an old amal valve and plumb it on to the vacume for the dump valve. this allws you to turn the dump valve on and off

 

i run efi, i havent got a dump valve, ive never owned one , and ill never get one , im currently at 18 psi before map after running in and so far , no problems

 

no need for the dump valve simple as, how many people do you know that have had turbo problems due to running a dump valve?

 

Had three DV's including a twin piston Bailey job over a period of 3-4 years and the car was never right with any of them. Best thing i did was file them away in the spares drawer. My Escort doesn' have one and my Fiesta won't be getting one either

 

Does the car have an Airleak or something else maybe that is causing the Turbo to overspeed? That seems very likely IMO. It should not be spanking turbo's at that rate, in any case.

Sorry if you already said and I missed, but in what way have the last 2 or 3 failed?

As Tony said, I run close to 2-Bar on what is considered one of the most delicate type of Turbo, the GT Series, and have never run a Dump Valve.

I used to run similar boost levels on my Stage 3 T3 too.

To be honest, yes to run a Dump Valve will increase your Turbo's chances of surviving, but when you stack all the other odds up against it, there are so many other things that can kill your turbo first.

Turbo warranties aren't worth sh1t in my opinion. As soon as a Turbo fails under warranty, it will have mysteriously been subjected to either a 'Foreign body' or 'Oil contamination'. Both of which are hard for you to fight anyway.

My money is on an Airleak. Start with your Throttle-body to Inlet Manifold Gasket.

 

Christian and Beccy

thank you, that is getting changed any way as i have a new inlet manifold
to go on, the first 4 turbos where done by turbo force and they did not have a good enough
machine tyo test the turbos to 150, 000 rpm so they were never good enough

 

PLEASE don't fit another Turbo to that car until you have found the cause of the failures. I hate seeing someone have so much trouble. That car should not be destroying turbo's at that rate.

Thats my advise!!

 

As above i think the problem lies else where six turbos Surely thats telling you that there is something wrong whats the chances of cooking six units in under 8000mls without crazy boost id get the turo replaced and then get it booked in somewhere to try and identify the problem Good luck