996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

Vendetta's 996TT Build

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  #31  
Old 08-14-2014, 12:15 PM
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FWIW i ran stock wastegates with evo's 1bar k16 tune and it ran fine (for all 200 miles before i swapped turbos to something bigger lol)
 
  #32  
Old 08-14-2014, 12:22 PM
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Originally Posted by dkfx
FWIW i ran stock wastegates with evo's 1bar k16 tune and it ran fine (for all 200 miles before i swapped turbos to something bigger lol)
that sounds right... i bar TUNE on STOCK wgs... should run fine... add 1 BAR WGS to a 1 bar TUNE and see it go thru the roof...
those are two different things... on stock wgs with a 1 bar your maxing out the n75 valve duty cycle.. add the 1 bar wgs and you will run ALOT more boost...
then you start backing off the wgs pressure( to keep the peak boost within reason) but keeping the wgs open down low and makes the car laggy.. on and on and on... thus a proper tune is is required... been there done that
 
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  #33  
Old 08-14-2014, 12:43 PM
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Originally Posted by MARKSKI@911tuning
on stock wgs with a 1 bar your maxing out the n75 valve duty cycle.. add the 1 bar wgs and you will run ALOT more boost... then you start backing off the wgs pressure( to keep the peak boost within reason) but keeping the wgs open down low and makes the car laggy.. on and on and on... thus a proper tune is is required...
that fine tuning makes a helluva lot of difference. i just went thru a few weeks of tweaking them along with new check/n75 valves etc. finally back to a solid and modest sustained 1.3


but it's amazing how much difference 1/8 turns of the wg's adjust can make both good and bad.
 
  #34  
Old 08-14-2014, 01:16 PM
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Originally Posted by '02996ttx50
that fine tuning makes a helluva lot of difference. i just went thru a few weeks of tweaking them along with new check/n75 valves etc. finally back to a solid and modest sustained 1.3


but it's amazing how much difference 1/8 turns of the wg's adjust can make both good and bad.
I'm assuming you are hooking some type of pump to the wastegate, then feeding it 14psi and making sure it opens then? is there a DIY on this? I wouldn't mind checking this everytime i changed the oil or something.
 
  #35  
Old 08-14-2014, 02:02 PM
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yes. i'm sure there's a diy on it in here with pics. my buddy has the homemade job and ( obviously ) a compressor. we found my leak within the first minute. the check valve whistled lol. that was helpful

i wouldn't bother with it as a normal maintenance kinda thing ( unless your obsessive lol ) any more than i would check my ic hoses or tugging on the y-pipe, absent any obvious leak issue. i generally only search for issues if i suspect i have one. beyond that, just a rigorous maintenance schedule i've found works best for me.

but if you want to pressure test as part of maintenance? no one could fault you for it.
 
  #36  
Old 08-14-2014, 02:47 PM
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Good info guys!! Thanks!

1 bar = Overboost?!? Pft silly Porsche engineers! Bunch of Buzz Killington's over there!
 

Last edited by 03EvoIII; 08-14-2014 at 02:50 PM.
  #37  
Old 08-14-2014, 04:11 PM
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betonred is infamous around these parts
it is raspy due to the catless system?
 
  #38  
Old 08-14-2014, 04:22 PM
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Originally Posted by dkfx
I'm assuming you are hooking some type of pump to the wastegate, then feeding it 14psi and making sure it opens then? is there a DIY on this? I wouldn't mind checking this everytime i changed the oil or something.
remove the rubber line to the w/g hook up a mityvac and pressurize to 14 psi and watch the rod start to move. simplest way
 
  #39  
Old 08-14-2014, 04:27 PM
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Originally Posted by betonred
it is raspy due to the catless system?
Believe it or not, it's actually less raspy at idle than it was with the cats. But at wide open throttle it rips like crazy. I absolutely love it!

-V
 
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