Combustion - was Re: Propane EFI

[Padgett 0sirius]

Never have run into anyone else with the same given name - did write quite
a bit in the eighties before disappearing into a black hole. 


At 05:40 PM 2/27/99 -0600, you wrote:
>Are you the same Padgett that had articles in several Pontiac magazines ?
>
>> -----Original Message-----
>> From:	Padgett 0sirius [SMTP:padgett at gdi.net]
>> Sent:	Saturday, February 27, 1999 5:15 PM
>> To:	diy_efi at efi332.eng.ohio-state.edu
>> Subject:	Combustion - was Re: Propane EFI
>> 
>> Uh folks, as far as energy per gallon is concerned, gas is gas, it is
>> all the same. What octane measures is how fast it burns and to a lesser
>> extent ignition pressure. Higher octane gives slower burning & more
>> resistance to "spontaneous combustion". The secret to a SI engine is
>> controlled combustion. Since the pressure rise is not instantaneous
>> mechanical spark advance is needed. Since the burn rate varies with 
>> chamber pressure, you also need vaccuum advance. The goal is for peak
>> cylinder pressure by about 10 degrees ATDC (varies a bit with engine
>> geometry). This will vary for any fuel used.
>> 
>> Might I suggest review of chapter 1 "Combustion" in Ricardo's "The High
>> Speed Internal Combustion Engine" ? Is better than Obert.
>>       	A. Padgett Peterson, P.E. Cybernetic Psychophysicist
>>  Anti-Virus, Cryptographics, & Antique Radio Researcher
>> http://www.freivald.org/~padgett/index.html
>>  mailto:padgett at gdi.net     PGP 5.5 Key on request
>
>
      	A. Padgett Peterson, P.E. Cybernetic Psychophysicist
 Anti-Virus, Cryptographics, & Antique Radio Researcher
http://www.freivald.org/~padgett/index.html
 mailto:padgett at gdi.net     PGP 5.5 Key on request