Re: Old time sponsors
- From: John McCoy <igopogo@xxxxxxxxxxxxx>
- Date: Sat, 05 Jan 2008 19:27:27 -0000
"annoyed@xxxxxxxxxxxx" <annoyed@xxxxxxxxxxxx> wrote in
news:6qtsn31fi83nvlamfgti00smrr9tehhf5s@xxxxxxx:
On Thu, 03 Jan 2008 17:58:04 -0500, SimRacer
<NOsimracer68@xxxxxxxxxxxxx> wrote:
What is the octane rating for modern E100 (basically pure ethanol)? I
came across some last week and tried it in my (business') E85/FlexFuel
Tahoe. Man, it pepped that puppy right up! lol Haven't seen any ill
effects as of yet, so I guess E100 is ok in it...lol I figure if
regular cars can run E5 (typical gasoline) that an E85 auto can run
E100 OK, we'll see. I've put about 80 miles on it since, and no Check
Engine Lights or funny smells have arisen...temps and pressures appear
ok too...
Anyway, a recent Hot Rod article put E85 at around 105 octane, I just
can't recall what it listed as octanes for the "purer" ethanol and
ethanol blends. It's great about the octane boost found in ethanol,
the only-40%-of-mileage compared to gasoline sucks however...I still
want a yard truck (since I don't own a farm but still need a heavier
duty truck for towing) that will run on french fry oil or soy-diesel.
Back when I lived in Phoenix and had a motorcycle, on occasion I would
add a pint of Cox model car fuel to a tank of gas as a little
pick-me-up fuel treatment. The two ingredients in it were methanol
and nitromethane so it couldn't be too bad ;)
The odd thing is I did track fuel mileage and got better performance
with it added in than on straight Arco pump gas.
Methanol (and ethanol) have considerably lower energy densities
than gasoline, which is why you have to burn more of it (by
volume) and thus get lower mileage.
Nitro also has a considerably lower energy density than gasoline.
In addition, to get any real benefit from nitro you'd have to
be running very rich (the value of nitro is that you don't need
anywhere near as much oxygen to combust it, and since airflow
into the cylinder is usually the limiting factor in power
production, anything which requires less air is a benefit).
My guess is that your bike was running rich - not uncommon for
carbureted motorcycles, especially sportbikes. Diluting down
the fuel with a little methanol probably brought it closer to
optimal, and allowed the engine to operate more efficiently.
John
.
- References:
- Old time sponsors
- From: PP
- Re: Old time sponsors
- From: John McCoy
- Re: Old time sponsors
- From: Chuck Steak
- Re: Old time sponsors
- From: ">G< ©"
- Re: Old time sponsors
- From: SimRacer
- Old time sponsors
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