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Alan L Alan L is offline
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Join Date: Apr 2006
Location: New Zealand
Posts: 3,261
Originally Posted by jwmarc View Post
...but what I found was that boost pressure bled off faster.. I went back and fourth a number of times between the two pipes... the car held .8 with the muffler... the internal baffles held the pressure better while with the straight pipe I would hit .8 and then watch the pressure gauge back off a bit to .6 while still heavy on the throttle... I am not sure if this would be the case with a different WG such as a Tial.

my 2 cents.
I'm a newbie to Turbo - so can't offer any useful opinion - but would the muffler affect the boost pressure bleed. I have a simialr issue with mine - slight drop in boost with increased revs. At the moment, among a hundred other issues, I'm chasing leaks. Mine has a straight pipe too. Given the dump from the wastegate is controlled by the spring, is it logical that the bleed could be affected by the muffler - downstream of the spring/waste valve?
Old 01-31-2008, 02:52 PM
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