Boost gauge & Dump Valve

jase750 · Jan 1, 2014

easye1 said:
was it not lancia stratos that first used extra injection/firing just after the exit on turbo as a means for keeping the turbine blades spinning between gear changes resulting in flames out the exhaust ?
now most snarling and growling rally cars use the idea.

No cause the stratos wasn't turbo charged it had a Ferrari derived V6 in the back

phill900r · Jan 1, 2014

it's not to get more power, it's to get what little power the hunk of junk had back. read my other post "UNDER POWERED"
it has been serviced.
I also use Shell fuel not cheap ****e.

phill900r · Jan 1, 2014

I am trying to figure out what my problem is. I can't feel when the boost comes in/on
I am not sure if the turbo is at fault or not.
I have just had a new fuel pump, new fuel filter, new water sensor, new air filter, the only thing I haven't changed yet is the glow plugs.
the disco has lost power, since I've owned it. it went into limp mode but read no faults on ECU.
then it started coughing & spluttering, still no ECU Faults.
we are planning a trip to Devon in July so need to figure out what's going on.
I don't mean to bitch about people posting stuff. I have been on the internet for weeks looking up about turbos & stuff & even with diesals a lot of people say a dump valve helps prolong the life of the turbo by dumping excess pressure inside.

jamesmartin · Jan 1, 2014

phill900r said:
I am trying to figure out what my problem is. I can't feel when the boost comes in/on
I am not sure if the turbo is at fault or not.
I have just had a new fuel pump, new fuel filter, new water sensor, new air filter, the only thing I haven't changed yet is the glow plugs.
the disco has lost power, since I've owned it. it went into limp mode but read no faults on ECU.
then it started coughing & spluttering, still no ECU Faults.
we are planning a trip to Devon in July so need to figure out what's going on.
I don't mean to bitch about people posting stuff. I have been on the internet for weeks looking up about turbos & stuff & even with diesals a lot of people say a dump valve helps prolong the life of the turbo by dumping excess pressure inside.

under power is one thing, dump valves on a diesel (there is no build up of back pressure like you get with petrol, and ecu measures boost in td5 system you just cause another fault )an other, turbo boost is less noticeble on a td5 than tdi ,there are many reasons for power loss ,from low coolant level to seized waste gate ,electrical issues ,fuel issues ,injector seals ,injector loom ,get codes read and work your way through it methodically ,theres tons of info on power loss for td5s and what and how to check ,dooes it run different with maf disconnected etc etc

DIFFLOCK66 · Jan 1, 2014

easye1 said:
resulting in flames out the exhaust ?

Most naturally aspirated, non turbo cars when tuned for more performance tend to do that.

.

Back to Phil's TD5 - James is right.

With my TD5, the car will pick up, slowly from 1500 rpm, even just above idle sometimes (we are talking unladen, just me in it), but then once past 2000 you feel it accelerate as the turbo boosts.

warrior · Jan 1, 2014

My old na track car running bike carbs banged and flamed like a fire work, and my bike engined track car now does the same and is also running carbs,

My take on dump valves, on a diesel is noise only if you want it.

On my evo 7 it had a recirculating dump valve I replaced this for a dual port so it only dumped to atmosphere at high rpm's I soon got fed up of the noise and took it off. I then ran no dump valve and found it a lot less laggy when changing gear was faster to spool te turbo up, side effect of this is compressor stall that sound like chirping,

Of your after noise put an mushroom style filter in the engine bay and you will here it flutter. I did this on my transit but agin got fed up of the noise so took it off.

Boost gauge & Dump Valve

jase750

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phill900r

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phill900r

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jamesmartin

Well-Known Member

DIFFLOCK66

Well-Known Member

warrior

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