I've suggested this before, and taken some heat for it, but try going to your
local tiny airport with a couple of gas cans. Fill up on 100LL. It's 100
octaine, and LOADED with lead, contrary to it's nomer as LL (low lead). Lead
was used in car fuel, and is still used in AVGAS not only to lubricate the top
end but to decrease detonation.
I have not done this as I don't have a blower, but it should work wonderfully.
Of course it's not very legal, but anything in the interest of boomin' and
zoomin'.
Geoff Branch
'74 Meejit "Yellow Peril"
'72 Innocenti 1300 Mini
----- Original Message -----
From "Glen Byrns" <grbyrns at ucdavis.edu>
To: <BANJOJOHN@aol.com>
Cc: <spridgets@autox.team.net>
Sent: Tuesday, March 18, 2003 6:15 PM
Subject: supercharging and octane
> John,
>
> Though I'm running a turbocharger on my 1275 and not a supercharger, they
> both will provide about a 6lb charge to the cylinders. I went through two
> sets of pistons thanks to detonation during the learning phase of getting
> the car set up.
>
> I burn 93 octane 'Premium" without any octane boosters. I used a small
> piece of tubing slipped over the post in the dizzy to limit the total
> advance(as I recall I lopped off 2deg of dizzy timing equalling 4 degrees
> crank timing). I also set the timing to 5deg. at idle. On top of that, I
> never run a lean setting and use an oxy sensor to guarantee that.
>
> Since those changes I've not blown any pistons, I don't overheat, and I
> boost often to 5 lbs and once in awhile I boost as high as 10lbs.(briefly).
> I'm running the low compression pistons with a ported head and an old Isky
> MM55 cam. I'm sure the mileage suffers due to sub-optimal timing and rich
> setting, but a turbocharged Sprite is not about mileage. (21mpg when
> 'boosting' like a looney on the weekends, 28 mpg cruising in 5th on the
> freeway.)
>
> Presented for what its worth, good luck with your supercharger. By the way,
> weren't those designed for the volumes of a 948cc motor? Do you anticipate
> any problems due to this?
>
> Glen Byrns
>
>
> > Thanks for the info Tim. I got the fax. I am thinking that the oiler for
> > the Supercharger is going to supply plenty of lubrication for the valves
> and
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