Hi guys
Just done some research on octane numbers to see what I need to use for the
AUHC (Australia US Healey Challenge) in 2005.
Australian Shell Optimax or BP Ultimate fuel is 98 RON and 86 MON and is
therefore equivalent to US 92 octane. Will run a compression ratio of about
10:1 in a cast iron head or a litle more with an ali head without pinging.
Cheers from West OZ
John Rowe
----- Original Message -----
From: "Larry Varley" <varley@cosmos.net.au>
To: "davidwjones" <davidwjones@cox.net>; "Bob Spidell"
<bspidell@pacbell.net>
Cc: <healeys@autox.team.net>
Sent: Saturday, July 17, 2004 10:12 AM
Subject: Re: High Octane
> Guys
> Yes Bob I'm quoting research octane numbers where you guys use the
> average of the research and motor octane number, so our 98 octane is
> roughly your 93 to 94 octane. Our 98 octane is basically our premium
> unleaded fuel.
>
> davidwjones wrote:
>
> >How would one go about getting the 98 octane (Shell Optimax Unleaded)
> >mentioned in Larry's e-mail.?
> >Years ago, I backed my '62 tricarb out onto a rickety old boat dock on
Lake
> >George and filled up with 98 octane that was intended for racing
> >ats... -After adjusting the timing on the spot to take advantage, the
> >drive home was an absolute BLAST. The car ran better, had substantially
more
> >power, and even sounded different... I'd been thinking about that ever
> >since, wishing that they still made the higher octane these cars were
> >designed for...
> >I don't want to start a thread about bogus and messy "octane boosters" I
> >think the list has probably been through all that before.. But hints on
> >where to get this 98 octane gas would be appreciated, even if I only got
> >some once in a while for an octane "fix".
> >
> >
> >----- Original Message -----
> >From: "Larry Varley" <varley@cosmos.net.au>
> >To: <healeys@autox.team.net>; <bspidell@pacbell.net>
> >Sent: Friday, July 16, 2004 5:50 AM
> >Subject: Re: Update to Healey 100 Restoration Site - DMD engine
> >
> >
> >
> >
> >>Bob (and interested parties)
> >>
> >>The initial test run of the DMD engine produced the following -
> >>Horsepower 295 at 6000 RPM
> >>Torque 300 ft/lbs at 3500 RPM
> >>Test conditions-
> >>98 octane fuel ( Shell Optimax unleaded)
> >>10.5 to 1 compression ratio
> >>33 degrees total advance
> >>fitted with triple 48mm Webers
> >>Camshaft 300 degrees duration
> >>Not a bad start I would think.
> >>Cheers
> >>Larry Varley
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