Quote:
Originally Posted by serialk11r
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A turbo does not usually increase the efficiency of the engine, if you're lucky under certain heavy load situations it will help a tiny bit. If you reduce the engine size and then turbo it, you are reducing engine efficiency most likely but the reduced engine size allows one to run the engine at higher load and thus better overall efficiency.
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It looks like I have picked up at least 3mpg after slapping the turbo on on my 395ci engine.
Then when I hook up the rammed air intake thats another 4% to 10% increase in FE (diesel_dave is reporting just over 4%, when I installed ram air/cold air on my non-turbo diesel setup back in 2006 it netted me closer to 10%).
I'm also not running an intercooler at the moment. No one has any rock solid numbers on hot boost versus intercooled boost but it looks like intercooling is good for at least another 5%.
Quote:
Originally Posted by Firestarter
a turbo counts as a muffler in a lot of states cause the turbine does a marvelous job of breaking up sound.
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This is true. I run a 3 inch down pipe into a 4 inch straight pipe and at idle its about the same noise level as when it was N/A with duel pipes and mufflers. Now its just got more of a turbo dragster sound to it.
It only starts to get loud above 9psi of boost.
In normal driving it doens't build more than 3psi.
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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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