cylinder index question

[Dan Cordon]

I had written a bunch about rotary engines and the justification for 
deciding if they count as one, two, or three cylinders per rotor. But 
since it's not audi related, I junked it :o)

I think I'm sitting okay on the index.

V8's -- 472, 5.0L, 351W, 350, 292
I6's -- Cummins 24V
I5's -- Audi 10V, Audi 20V
I4's -- Honda B16, Honda D16, Honda V45 V4
I2's -- Xenoah 2-stroke
Singles -- Saw, Mower, RC .18, RC .21, Air .45

That looks like 75/28 for ~2.6  Not breaking any records, especially in 
this company :o)  I know I should have bought that 1970 V16 Opel GT last 
year.

For those looking to catch up to the 1:1 ratio, don't forget that many 
of the rotary air conditioner compressors have several pistons a piece 
in them. As do many of the air tools we use...

I would like to make a recommendation that if your engine has a prime 
number of cylinders then you get a 100% cylinder credit. So, 3 cylinder 
engines get counted for 6, and a 5 cylinder will get counted as 10. 
Also, being turbocharged should give you a multiplier equal to your peak 
manifold pressure in *bar*. So, a 4 cylinder honda with 2.0 bar of boost 
would get a 8 cylinder claim. Or, and audi 5 cyl with 2.0 bar of boost 
would actually get to claim 20 cylinders.

It reminds me, when talking to one of the profs who just got a 
supercharged Benz....he was saying that the blower made that 4 cylinder 
feel a lot more like a V6. I told him "I understand....my turbo I5 audi 
feels a lot more like an I7." <grin>

-- 
Dan Cordon
Mechanical Engineer
University of Idaho - Engine Research Facility