Turbos

[Jonathan R. Lusky]

robert dingli writes:
> 
> Giles,
> 
> I second Peter's comments.  10.5:1 is way to high to do anything with a turbo
> on such an ancient head design (unless you wanted to run on methane :-)

Actually, even methane (or good CNG) isn't a good option...  once you
get over about 10.5:1 effective compression, methane burns hotter than
gasoline...  and it already burns significantly slower than gasoline.
The result is ridiculous EGT's.  I've heard that 14:1-14.4:1 is the
limit for a naturally aspirated methane fueled engine because you start
melting the plasma off the top compression ring... not sure how that
would translate for a boosted engine.  You can make more power with 114
octane high-lead race gas, anyway.

-- 
Jonathan R. Lusky                        lusky at knuth.mtsu.edu
http://www.edge.net/~lusky/                 (615) 726-8700
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68 Camaro Convertible - 350 / TH350  \_/ 80 Toyota Celica - 20R / 5spd