Re: Octane Boosters - Advise needed

["Ron Buchalski" <rbuchals@xxxxxxxxxxx>]

BMW didn't de-tune the engines so they'd pass US emissions.  The chip is 
programmed with fuel and ignition maps that limit the maximum amount of 
spark advance, to prevent damage when using lower octane fuels.

The JimC chip provides more possible spark advance (among other things), so 
they require you to use 92 or higher octane.

Regarding octane boosters, the simple answer is that they don't really boost 
octane much, so they aren't worth the cost.  Besides, the performance gain 
from octane boosting beyond what the engine really needs (which is 92-93 
octane), won't really provide much benefit.

I have a '95 M3 with JimC software/intake/Euro HFM, and normally run 93 
octane.  As a test, I filled the tank with 100 octane fuel (Sunoco unleaded 
race fuel), and found the street performance to improve.  But, at nearly $60 
for a full tank, it's not something I can afford to do.

Octane additives only boost the octane ratings by a small amount.  The 104+ 
brand of octane booster doesn't boost your octane rating to 104.  You'd be 
lucky to get a gain of 1 point.  Not enough to notice, and certainly not 
worth the cost.

If you want to read some info on octane boosting, check this out:

http://www.elektro.com/~audi/audi/toluene.html

- -rb

>
>Date: Wed, 25 Sep 2002 20:36:01 EDT
>From: DJLogan33@domain.elided
>Subject: Octane Boosters - Advise needed
>
>I own a 1999 M Coupe.
>I have installed the Jim Conforti "Shark Injector" performance software.
>The car feels like it runs better and acceleration times prove that it is
>stronger.
>
>Apparently the engine had to be de-tuned to run on Regular gas to meet the
>USA DOT laws, because
>the instructions with the software states to use only "Premium" gas only.
>
>I recently tried an "Octane Booster" and it felt like it ran better.
>
>I am attending a Drivers School this weekend and I would like the car to 
>run
>as good as possible.
>
>Has anyone used Octane Boosters?
>Are there differences between the different brands?
>If so, what is the best on the market?
>
>Pleas email me with advise.
>
>Dennis



_________________________________________________________________
Chat with friends online, try MSN Messenger: http://messenger.msn.com

------------------------------