Throttle Plate Control

[Jonathan R. Lusky]

Lawrence S. Harris III writes:
> 
> > jumping in a little late here, but my BMW (from all the explanations I've
> > gotten) cuts fuel supply by 50% 500rpm below rev limit, and then cuts it
> 
> Are you sure of this?  This seems like a recipie for how to blow up a 
> motor.  If the car was running at a full throttle mixture of 12:1, and 
> suddenly before reaching the rev limit it went to 24:1, this would have 
> most uncool results.

16:1 would scare the hell out of me, but I believe 24:1 should do its
intended function pretty well and do wonders for your NOx emissions :).
I don't have any reference to quote, but if I remember right 24:1 is way
past where peak (combustion? flame? whats the correct term?) temp starts
dropping, and you ought to be running significantly cooler at 24:1 than
you were at 12:1.  Thats assuming you can actually burn a 24:1 mix worth
a flip.  I've been out to 25:1 at WOT on CNG (can we say
"undercarb'd"?).

-- 
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