Re: octane?

[Kevin <aventari@cts.com>]

Well, if you have a < 9.3:1 compression such as my 8.6:1 you CAN benefit
from 92 octane IF you advance the timing to take advantage of the higher
octane. It will also use the higher octane if you have an ignition system
that will advance all it can almost until detonation, a la 16v CIS-E. these
both will give ya more power (oh oh oh!) and better gas mileage.

At 08:36 PM 12/6/98 +0000, you wrote:
>just went though a very heated debate on this on the Passat list.
>
>normal engines less than 9.3:1 compression will not benefit from 
>octane ratings higher than 87.  they will benefit from the cleaners
>but you're better off economically dumping in a bottle of techron in 
>every 25k miles. If you run a high compression engine you will 
>benefit from running higher octane gasoline, however 87 will be just 
>fine, you'll just have to live with low performance and the 
>occasional ping, which isnt harmful unless its pinging a LOT.
>
>Ryan
>these are general remarks, to get into detail about how and when and 
>why would take too damn long, so if you have a specific question 
>concering a statement i made please ask, DONT post crap like "That's 
>not ALWAYS true, and i'm calling bullshit" ..because there is 
>probably an exception to every rule, right now i just thought of one, 
>a supercharged or turbod engine may have less than 9.3 compression 
>yet you need to run higher octane because of relative explosion and 
>burn factors are hot enough to release the potential energy in the 
>higher octane gas. I took these remarks direct from Government and 
>University of Louisiana test data and resulting comments from 
>gasoline chemists.
>
>Mannix disclaimer off.

--
Kevin Fry .:. 81 Scirocco S JH -- turbo soon to come!
      San Diego, CA
"If God had meant for us to use the metric system, we would've been born
with ten fingers and ten toes."

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