[Diy_efi] Timing Advance Curve?

[Mike]

yeah no worries,

Brian quoted an interesting reference just recently, more up
to date then on my old lab or workshop PC

http://www.faqs.org/faqs/autos/gasoline-faq/part1/

>From what I recall methanol is almost likely the ideal
fuel, highest octane by far and (in theory) cheapest
to make (if people dont profiteer from supply chain),
only couple of probs are weight for energy is half that
of petrol and the invisible flame on pure methanol, so
use an additive to make it visible - like potassium
carbonate or some chromium or copper compounds as methanol
behaves like water in terms of being able to dissolve
ionic salts of copper etc - Who knows, adding a particular
copper compound to methanol may well do something of
interest to further increase octane (and alter burn rate ;)
but there are several thousand to choose from <sigh>,
but it would give a nice green flame :o)


rgds

mike


At 05:27 PM 20/12/2002 +1300, you wrote:
>Without coming across the wrong way Mike, why not put some truth to the
>'rumours' on burn rate and octane rating etc?? I'm sure that a few people
>would learn something.
>
>I'm particularly interested in methanol's properties and rates etc.
>-- 
>Matt Porritt
>RC Race Cars and Supplies
>ICQ #22776813
>
>
>On 20/12/02 12:27 PM Mike wrote
>
>> At 12:03 PM 19/12/2002 -0800, you wrote:
>>> --- Hugh Keir <hugh at sol.co.uk> wrote:
>>> 
>>>> In short octane has everything to do with the speed
>>>> of the burn.
>>> 
>>> I'd add that this is only completely true in pump gas.
>> 
>> In Australia we call this a 'load of bull', it is *not*
>> completely true under any circumstances Adam.
>> 
>> Your opinion is "broken and needs fixing" cause it perpetuates
>> an invalid unsophisticated myth stemming from a misunderstanding
>> of petrochemicals and what fuel companies do...
>> 
>> There 'might' be a minor correlation between higher octane
>> and speed of burn it aint a causual relationship and in fact
>> the opposite tends to be true to a much larger degree,
>> 
>>> Racing fuels often will burn more rapidly than pump
>>> gas without pinging.
>> 
>> yes, and the component petrochemicals are not woefully
>> dissimilar to that in pump gas, go talk to the fuel
>> companies - and not some apprentice at the first
>> level of contact...
>> 
>> You're way off the mark Adam, please dont put your
>> opinion re octane/burn rate in your book - you might
>> get sued...
>> 
>> Please check your references before putting anything
>> like that down on paper or in emails for that matter
>> 
>> <sigh>
>> 
>> rgds
>> 
>> mike
>> 
>> 
>> 
>>>> High octane fuels do not necessarily give the most
>>>> power.
>>> 
>>> In fact, unless your timing is optimized for them, you
>>> can LOSE power with them.
>>> 
>>> =====
>>> | Adam Wade                       1990 Kwak Zephyr 550 (Daphne) |
>>> |   http://y42.photos.yahoo.com/bc/espresso_doppio/lst?.dir=/   |
>>> | "It was like an emergency ward after a great catastrophe; it  |
>>> |   didn't matter what race or class the victims belonged to.   |
>>> |  They were all given the same miracle drug, which was coffee. |
>>> |   The catastrophe in this case, of course, was that the sun   |
>>> |     had come up again."                    -Kurt Vonnegut     |
>>> 
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