Hi Folks, while at Maxton last weekend I had a chat with the VP folks
and picked up one of their brochures describing their fuels, since VP
will be the event spec gas at ECTA for this racing season.
I asked a few of our racers which VP racegas blends they selected from
the many on hand and here's what they said:
Scott Guthrie chose C14 for unblown and C16 for his turbo bike engines.
Larry Forstall chose C16 for the turbo Suzuki Hayabusa ridden by Steve
Knecum that set a new all-time ECTA record for bikes or cars at 234 mph.
Bob Gribble chose C14 for his Muscle Motorsports T-Bird that did 205 mph
driven by Bridget Krompass on Saturday. Bridget told me the car handled
so well and felt so safe, "it was easy".
Here are the specs for C14 and C16 from the VP brochure:
"C14 Recommended for normally aspirated high compression, high rpm drag
race applications, high compression PWC (230psi or higher), 4 stroke
motorcycle racing and other normally aspirated engines operating 8500
rpms or with compression ratios of 14:1 and over. NHRA Comp Eliminator
Spec Fuel.
Color: Yellow
Lead: 4.23 Grams per gallon
Motor Octane: 114
Specific Gravity: .690 at 60 degrees F."
"C16 Used in: Turbocharged engines, blown engines and nitrous
applications. NHRA Comp Eliminator spec fuel. Recommended by the top
nitrous oxide companies.
Color: Blue
Lead: 6 Grams per gallon
Motor Octane: 117
Specific Gravity: .730 at 60 degrees F."
In looking over the rest of the VP brochure, the following item caught
my eye in light of our discussion on this List a week or so ago about
the burning forces pushing down on the piston during the power stroke:
"2. Burning Speed: The speed at which fuel releases its energy. In a
high-speed internal combustion engine, there is very little time(real
time - not crank rotation) for the fuel to release its energy. Peak
cylinder pressure should occur around 20 degrees ATDC. If the fuel is
still burning after this, it is not contributing to peak cylinder
pressure, which is what the rear wheels see."
VP Racing Fuels, Inc. has a website at www.vpracingfuels.com.
The three racers cited are all I had a chance to ask about their fuel
choices, but input from any others who ran at Maxton last weekend would
be welcome.
Cheers Ardun Bill
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