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Re: supercharging (options)

To: tr6taylor@webtv.net (Sally or Dick Taylor)
Subject: Re: supercharging (options)
From: Erik Quackenbush <erik@midwestfilter.com>
Date: Wed, 27 Nov 2002 10:04:00 -0600
At 02:46 PM 11/26/2002 -0800, Sally or Dick Taylor wrote:
>Erik---You are right, of course, when stating that higher octane "fuel"
>will postpone detonation, as will intercooling.  I do see a plumbing
>nightmare in using an intercooler with a carbureted TR engine, given
>their usual mounting points. I guess it could be done tho, if the SC
>were mounted where the alternater is, and go from there.

An air to air intercooler would be hard. An air to water unit would be a 
lot easier. You put a heat exchanger in the intake manifold and pump 
coolant to and from a radiator at the front of the car. This is how Jaguar 
fit an intercooler into the XJR. We're doing something similar for the 
$2003 Challenge.

>Propane is cooler by nature, right?

Propane is liquid in the fuel tank. At atmospheric pressure propane boils 
at something like -44 degrees F. Frostbite happens.

>What would your recommendation be for the % of tolulene to gasoline?
>What effect would it have on the spark plug tips? Would such an engine
>"start" when cold?

Good questions. You'd have to decide what octane rating you want and mix 
the percentages. I would guess you could get away with hotter plugs. 
Toluene doesn't like to ignite when it's cold but I think that's only a 
problem when it's not diluted with gasoline.

>TRICK racing gas in the L.A. area goes for $4.75/gal for 112 unleaded,
>and $5.00 for 117 leaded. Union 100 octane was $3.50 last time I
>checked.

If you don't need 117 octane you'll save money if you buy toluene in 5 
gallon containers (or 55 gallon drums) and mix your own. I'm not sure what 
the tax/legal issues are for a street vehicle. I wouldn't put a sign on my 
daily driver that says "Save tax: mix your own fuel".

>With your combo of propane, intercooling and very low CR, I would be
>surprised if you couldn't up the ante on boost pressure to more than 10
>lb, w/o dtonation.

I said more than 10. I didn't say how much more... ;{)


--
Erik Quackenbush, Midwest Filter Corporation 
1-847-680-0566  http://www.midwestfilter.com

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