<VV> More BMEP Safely

[FrankCB at aol.com]

Padgett,
       If you read about Sir Harry's experiments with water injection in the 
same book, you'll see he has a very informative graph that clearly 
demonstrates how using water injection can allow you to significantly increase BMEP 
(AVERAGE cylinder pressure that makes torque) WITHOUT increasing PEAK cylinder 
pressure that breaks things.  If you don't want to spring for the big $$ for the 
newly available reprint of Sir Harry's book, you can find the same graph in 
Hugh MacInnes' much cheaper book "Turbochargers" in his chapter on Water 
Injection.
       Correctly applied water injection can also enable you to run your 
Corvair on regular gas without pinging/knocking since it reduces that PEAK 
cylinder pressure without decreasing average pressure (BMEP).
       Frank Burkhard       

In a message dated 6/21/05 9:11:49 PM Eastern Daylight Time, pp2 at 6007.us 
writes:

> Shortening things by a couple of hundred pages (see "The High Speed 
> Internal Combustion Engine" by Sir H. R. Ricardo), this is basically why if 
> you can control manifold vacuum so that it never drops to zero, you can run 
> a lower octane fuel. Is a much better control than just retarding the spark.
> 
> Padgett
>