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Boost pressure plumbing

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stuartevans:
this may sound like a stupid question but im all new to this what does doing this achieve?

Les Henson:
Depending on the type of guage you fit - it shows when the turbo is on boost/what the boost pressure is. Just a means on keeping an eye on what the engine is doing, much the same as fitting a volt meter, amp guage, oil pressure guage, etc.


Les.

stageonesimmo:

--- Quote from: stuartevans on June 19, 2008, 22:16:52 ---this may sound like a stupid question but im all new to this what does doing this achieve?

--- End quote ---

In standard form the waste-gate actuator opens the waste-gate when it senses the correct boost pressure at its standard location - at the turbo outlet.  However, due to friction, bends the intercooler etc etc, some of that pressure is lost between the turbo outlet and the valves.  Moving the position that the waste-gate senses its pressure closer to the valves means that you over come these losses and have more chance of having full boost at the valves where you need it.  It may not seem like much but it made a hell of a difference to mine!  I was losing nigh on 0.25 bar through the pipes and cooler meaning that I could only ever expect to get 0.75 bar at the valves - now that the waste-gate opens when the correct pressure is reached at the valves I'm getting the full works all the time.

chris.hunt22:
I have plumbed my gauge into a tapped fitting in the plenum chamber, my gauge at full toot is reading about 0.6 - 0.7 bar, I have read in my Haynes manual that 300 tdi will boost from 0.7 - 1.0 bar but where is this reading taken from, I don't want to crack the actuator up to 1 bar and get a loud bang one day!!!!

Snake110:

--- Quote from: chris.hunt22 on June 29, 2008, 10:03:29 ---I have plumbed my gauge into a tapped fitting in the plenum chamber, my gauge at full toot is reading about 0.6 - 0.7 bar, I have read in my Haynes manual that 300 tdi will boost from 0.7 - 1.0 bar but where is this reading taken from, I don't want to crack the actuator up to 1 bar and get a loud bang one day!!!!

--- End quote ---

Further to this would someone kindly confirm what peak boost should be for a 200Tdi on the standard intercooler so i can set mine for optimum without
melting pistons or blowing gaskets? i have been told 13psi but this seems like an odd figure to me..

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