Quote:
Originally Posted by freebeard
I don't deal with these things much—if the turbo muffles the exhaust, would it do it with more or less restriction than a passive muffler with equivalent effect? Could you 'tune' the turbo for maximum acoustical results?
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I run a straight pipe on my turbos.
If you use a Holset, they are very quiet. When I was only running the Holset with the straight pipe it was quieter than when the engine was N/A with factory mufflers and full exhaust.
The Garretts are a little noisy.
From back pressure tests others have done with Holset HE351VE and HX40 turbos with a straight pipe during normal driving the back pressures are about the same as the back pressure I got when I had the factory mufflers on there.
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1984 chevy suburban, custom made 6.5L diesel turbocharged with a Garrett T76 and Holset HE351VE, 22:1 compression 13psi of intercooled boost.
1989 firebird mostly stock. Aside from the 6-speed manual trans, corvette gen 5 front brakes, 1LE drive shaft, 4th Gen disc brake fbody rear end.
2011 leaf SL, white, portable 240v CHAdeMO, trailer hitch, new batt as of 2014.
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