[Roadsters] What is in todays fuel that makes everything gum up?

[Jim Gammon]

One thing to remember is that  lead will screw up a cat converter on a modern
car.
 
JimG
69 2K NJ

--- On Mon, 9/21/09, Scott Ulrich <scott8933 at socal.rr.com> wrote:


From: Scott Ulrich <scott8933 at socal.rr.com>
Subject: Re: [Roadsters] What is in todays fuel that makes everything gum up?
To: "datsun-roadsters: autox.team.net" <datsun-roadsters at autox.team.net>
Date: Monday, September 21, 2009, 12:53 PM


I didn't mean the *actual *use of avgas was all talk - I meant that I just
didn't believe the guy in the jacked-up Camaro with a racing cam and 3"
exhaust (and no other mods) who claimed to be filling up at the airport.
There was a guy in the SFValley who was kind of famous for building sleepers
- he'd stuff a big block into a Gremlin, then put "6-cylinder" stickers back
on the air cleaner. Big mufflers, barely made a peep, stock steel wheels -
but cut and widened a few inches. No big cam, just lots of cubic inches.

That was the guy, if any, who may have been filling up at the airport. But
generally the noisier the car, the bigger the mouth, and the less they knew
how to build a car for street racing. And they were always surprised to get
spanked by a Datsun.

"What good's that hood scoop going to do you at 8000rpm doing 35 in 1st
gear? Gonna get all that power down with your open 3:27? Do you even *know
*how
your rear-end is geared? Okay then, want to race that foreign car sitting
over there?"

Of course my own hubris got me beat plenty of times by sleeper Z-cars
running a hidden tank of nitrous somewhere, who'd back-pedal me for the
first run. Ah...fine memories.

My hair went away with the cars...




On Mon, Sep 21, 2009 at 9:25 AM, RWM <RWM at rwmann.com> wrote:

>  Well, not entirely talk...
>
> In the "bad old days", avgas was heavily leaded and available in green
> 100/130 octane and (less available) purple 115/145 octane.
>
> The green and purple avgas blends were highly sought after for racing use.
>
> Now, as Jim says, the lead is long gone and blue 100LL prevails, though for
> a while in the 1990s, red 80/87 motor gasoline was in use.
>
> I use Stabil over the winter in yard machinery and the 2000 and it works
> fine.   Stabil itself seems to have a very long shelf-life (un-mixed).
>
>  - Bob
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