Subject: Re: high octane gas
Author: Robert Hawkes
Date: Jul 15, 2001, 6:19 AM
Post ID: 1707499066
John,
Nice explanation, thanks. I am trying 94 octane now. Bob Hawkes
----- Original Message -----
From: John Prusnek <spaj-@raex.com>
To: <Loopfram-@topica.com>
Sent: Friday, July 13, 2001 10:47 AM
Subject: high octane gas
| ============================================================ Developing software is a grueling workout. Outfit yourself with gear made for the long haul. Get tutorials, skills, and code for open standards-based software at developerWorks. http://click.topica.com/caaacwKb1dfltb1FlG8a/developerWorks ============================================================ Bob Wrote:
|
|
|
I typically use 100 LL (low lead) octane avgas in my Laverda SF1. It's a higher compression engine than the Guzzi, and likes the high octane although it will run ok on the highest octane pump gas that I can find when on long trips. I've also used it in my '68 Harley when I suspected a batch of bad gas and the engine was detonating (pinging) and overheating. Cleared it right up, and eliminated any other (more expensive) problems that I suspected. For once a cheap fix! Sorry, Chris I've used avgas for years with no detrimental effect. Burns nice and clean. I'm fortunate to live near a small regional airport that has a credit card operated pump. Don't even have to talk to a human, although I fill a bunch of 5- gal. cans, as they frown on filling vehicles from the pump. If anyone asks, I'm going racing for the weekend so they don't get their panties in a knot over road taxes, etc. I do get a kick out of it when the pump asks for a tail number. I've never had to retard the ignition when using 100LL, can't understand why. I did have to set the idle up on the Harley slightly. The higher the octane, the slower it burns, which causes it to 'push' the piston through more of its stroke rather than slap it with a quick explosion. That's why you get pinging on low octane gas. Hope this helps. John Prusnek |