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- From: jgd@dixie.com (John De Armond)
- Subject: Re: Oxygenated Gasoline and Low MPG (super unleaded?)
- Message-ID: <j34rxp-@dixie.com>
- Date: Tue, 12 Jan 93 05:57:48 GMT
- Organization: Dixie Communications Public Access. The Mouth of the South.
- References: <4278.88.uupcb@chaos.lrk.ar.us> <841r97b@dixie.com> <29522@oasys.dt.navy.mil>
- Lines: 96
-
- bense@oasys.dt.navy.mil (Ron Bense) writes:
-
- >If you want to call a guy that has attained the rank of captain a day
- >laborer, be my guest.
-
- >>Not suprising. Hourly workers have all kinds of superstitions that
- >>can't be changed by any amount of fact. When I used to work in a
-
- >See above.
-
- Rank means he can salute when required and a few other things unrelated
- to knowing about the constituents of motor fuel. Believe what you'd
- like. No concern to me.
-
- >>ethers fit the category. If you think that ANY of these fuels can
- >>burn without oxygen and thus are hard to extinguish OR you believe
-
- >Obviously I don't, would you care to check your reading comprehension
- >by going over this thread again?
-
- If you want to bring potassium permanganate into a discussion about
- motor fuels, expect to be treated like either a very uneducated
- person or an idiot or both.
-
- >b) My car compensates for "leanness" by reading the O2 value in the
- > exhaust and regulating fuel input to the engine. This does not
- > apply.
-
- It does not compensate at wide open throttle which is where power is
- made. Yes it will compensate and even learn the new fuel but it will
- NOT compensate for the loss of power associated with WOT leanness.
-
- >>Specific energy is almost the same for alcohol and gasoline:
-
- >>Gasoline 2.92
- >>methanol 3.08
- >>Ethanol 3.00
-
- >very good, now let's look at:
-
- >>Heating value
-
- >>Gasoline 42.7 MJ/kg
- >>Methanol 19.9
- >>Ethanol 26.8
-
- >Heat and gas expansion are where the energy comes from. Which would
- >you rather be running your car on?
-
- I'd personally be running Methanol, assuming I could get it at a
- specific energy equivalent price. Specific energy is the prime
- indicator of a fuel's power potential.
-
- >>oxygen content:
-
- >Ah, but the add-on conversions (which, from what I remember about them,
- >don't cost an excessive amount) would significantly reduce pollution
- >in older cars, would they not? More so than this meager reduction offered
- >by the "new" gas, after you factor in how much more of it is burned.
-
- Since I used to own a company that did propane conversions, perhaps
- I can comment with a bit of specificity. A duel fuel conversion, ie,
- an IMPCO propane carburator added on top of the gasoline carb cost about
- $1000 in materials and about $300-500 in installation in 1985.
- A single fuel conversion optimized to use the higher octane available
- would run $700-1000 more because the heads have to be pulled and milled
- and/or higher compression pistons fitted. I
- assume the price has done nothing but go up. Propane WAS cheaper than
- gas to run because it used to be cheaper than gasoline. I used to
- pay 60-65 cents a gallon and retailed it at 75-85 cents a gallon plus
- tax which was 20 cents back then. That compared favorably to the
- $1.20 a gallon for gas back then. Last bulk load of propane I bought
- for my cabin was 1.20 a gallon. No bargain. As far as emissions,
- the only thing propane brings to the table is a reduction in HC
- emissions and to a less extent, CO emissions due to there being no
- liquid fuel involved.
-
- As to the economics of conversion for emission purposes, for the
- $1500-2000 involved, I can install a port fuel injection system and
- cat converter, meet modern emission standards for everything except
- evaporative emissions and still be able to fill up at the corner
- station. For about $600 I can install an aftermarket cat converter
- and closed loop air bleed system that makes even an carburated
- engine meet emission standards. No bargains for propane there.
- The only real bargains for propane involve situations where one
- can buy propane in bulk and it will be used off-road so road tax
- can be avoided. That's why you find it in fork lifts and yard
- trucks and not much on the road.
-
- John
- --
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