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Old 02-27-2012, 11:42 PM   #24 (permalink)
oil pan 4
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Boosting compression inside the engine is more efficient.
The diesel alone is around 30% efficient, the turbocharger is less than 10% efficient.
I have selected the most efficient turbo I can find (also cost efficient, $180).
Increasing compression is proven to increase efficiency in piston engines. The only reason you lower compression in a diesel is to reduce NOx, allow for more boost to be ran to boost power and reduce fuel economy.

Why do all these people want to reduce compression in hopes of increaseing fuel economy?
You think it would take less force to get the piston to TDC on the compression stroke and I can see that but that doesn't mean it will make the engine more efficient.
Notice all the OEMs have gone up in compression since the 1980s not down (except diesels, they all went down for emmissions reasons).

11 inches of water, no more. - Diesel Place : Chevrolet and GMC Diesel Truck Forums
Here is my old intake setup.
A ram air intake, with 14''x6'' of air filter on a ported J-code intake manifold.
NO EGR.
I sold it on diesel place.

I am going to do a ram air turbo set up but I don't know how it will look, all I know so far is i am going to use a big off the shelf paper air filter and relocate the batteries to make room for it.
Just going to build upon what I already know, diesels love compression and having their cylinders stuffed with air.
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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.

Last edited by oil pan 4; 02-27-2012 at 11:47 PM..
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