[Land-speed] alcohol

[Dave Dahlgren]

Some myths busted, First remember alky is lower in octane than a good racing 
gasoline well actually performance number as there is no octane over 100. 
Alky is around 102 and racing gasoline starts at around 108 and goes up from 
there, So less timing is the smart move. Second you can not add fuel in 
place of coolant for anything that is the minutes range. Next anything over 
approximately 15 to 1 CR results in more pumping losses than HP gains. For a 
non inter cooled supercharged engine alky is your best friend the latent 
heat of vaporization fixes a lot of problems. Hope this helps..
Dave
----- Original Message ----- 
From: "Tom Bryant" <saltracer at awwwsome.com>
To: <land-speed at autox.team.net>; "tom sarda" <sardatech at yahoo.com>
Sent: Sunday, March 02, 2008 7:28 PM
Subject: Re: [Land-speed] alcohol


> Tom,
>
> Because of the distance that we run, I would not think that eliminating 
> the
> cooling system is an option, but you can somewhat control the engine temp 
> by
> jetting. You can run a lot more compression than I can get in a 300 inch
> Chevy, at least 16:1, maybe more. The best I have been able to get in my
> motors is a bit over 13:1. I wish I could get more!
>
> I run a mechanical injection so I am not conversant on running alcohol in
> carburetors, but I suspect you have the same issues. Alcohol must be 
> flushed
> out of the between events or problems arise. I have had to disassemble the
> fuel pump and clean out the residue because of negligence in this area . 
> The
> rubber hoses will harden over time and have to be replaced, also.
>
> I like alcohol because it runs cooler (we have always had high temps with
> gasoline), cleaner and is supposed to give more HP, but so far I have not
> been able to exceed our gasoline speeds by that much. Also, as I 
> understand
> from what I have read, you should use more ignition timing, but it seems
> that doesn't work for us either. Maybe someone can tell me what I am doing
> wrong.
>
>
> Tom, Redding CA - #216 D/FCC
>
> -------Original Message-------
>
> From: tom sarda
> Date: 3/2/2008 6:53:54 AM
> To: land-speed at autox.team.net
> Subject: [Land-speed] alcohol
>
> What considerations do you have to make when using
> alcohol fuel? Is cooling the engine an issue? what
> about compression ratio, parts compatability, etc)fuel
> pump, carburetor, fuel lines and such) Could I
> eliminate a cooling tank/ radiator?
> Thank. Tom
>
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