I forgot, we used that too. We used about 85% methanol, 2 or 3% toluene, a
little acetone, and the rest premium gas. Methanol has about half the energy
content compared to gasoline so you need to nearly double the jet area for
the 85% methanol mix. We did all that. We did the dyno testing using
aviation fuel, so any HP gain from using methanol or loss from getting the
methanol jetting incorrect wasn't reflected in my earlier compression ratio
comparison.
If you do it right, you can obtain about 10% horsepower gain using methanol
compared to gasoline, due to methanol's oxygen content. However, methanol is
corrosive to aluminum and toxic to people, and one of the combustion
byproducts is formaldehyde - nasty stuff.
Theo
> -----Original Message-----
> From: Doug Mallory [SMTP:rdmallory@earthling.net]
> Sent: Friday, January 21, 2000 9:29 AM
> To: Theo Smit; tigers@autox.team.net
> Subject: RE: Performance Tuning the Tiger
>
> Try Toluene for mixing your own. Just don't get it on your hands it
> will make you sick.
>
> Methanol has less hp than gas you will have to rejet to get the gain.
>
> Doug
>
> At 08:20 AM 1/21/00 -0700, Theo Smit wrote:
> >Tim, and Listers,
> >
> >I played that game, too, when I had the green machine in its final stages
> of
> >evolution. 12.2 to 1 compression (9/16" pop-ups on the pistons), and
> running
> >a mix of premium pump gas, acetone, and methanol. What's interesting
> >(disappointing, at the time) is that with that setup, it made only a few
> >more HP on race gas than my previous engine, which had 10.5:1
> compression,
> >and the 10.5:1 motor would run on straight premium all day long.
> >
> >If I'm going to go to the effort of building a decent engine for the
> Tiger,
> >I don't want to go overboard and end up with a detonation special, but I
> do
> >want to get maximum bang for my buck.
> >I know I could just keep it stock, but that's not the point...
> >
> >
> >Theo
> >
> > > -----Original Message-----
> > > From: Ronak, TP (Timothy) [SMTP:Timothy.P.Ronak@akzo-nobel.com]
> > > Sent: Friday, January 21, 2000 6:58 AM
> > > To: 'Bob Palmer'; MWood24020@aol.com; TSMIT@isotel.com;
> > > rdmallory@earthling.net; Ronak, Timothy P; tigers@autox.team.net
> > > Subject: RE: Performance Tuning the Tiger
> > >
> > > Bob,
> > > I have to agree with you about the effect removing and sharp spots
> from
> > > the
> > > combustion area will have on detonation. The key to avoiding the
> excessive
> > > pressures is by changing where the Intake valve closes in relation to
> the
> > <snip>
> > > piston can build. I do know that back in the race car days we had an
> > > engine
> > > that was 14:1 (remember that car Theo .. it was blue and yellow) it
> made
> > > over 220 cranking cylinder pressure and we had to run C-14 and
> methanol in
> > > a
> > > 15% and 85% ratio respectively or it detonated like crazy.
> > > My 2 cents too,
> > > Tim Ronak
> > > B382000680
> > > PS: It is amazing how a well placed email gets us back on the
> performance
> > > topic....YEEHaaaww!
> > >
> > > rpalmer@cts.com
>
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