VP to Sunoco reference

[Mike Croley]

There haven't been very many race fuels submitted for NHRA approval by any of the manufacturers. Renegade makes several, but they aren't on the approved list as they weren't submitted..
For 8:1 you might want to stay with 93 octane street gas, Shell or Chevron.

[Mike Croley]

For crossover of race fuels, here's some numbers.

Sunoco 110 Motor Octane 106 Specific gravity .729
VP 110 Motor Octane 107 Specific gravity .720 to .730
Renegade 110 Motor Octane 108 Specific gravity .718

Sunoco 112 Motor Octane 109 Specific gravity .715
VP C-12 Motor Octane 108 Specific gravity .717
Renegade 112 Motor Octane 109 Specific gravity .718

VP C-16 Motor Octane 117 Specific gravity .735
Renegade 120 Motor Octane 120 Specific gravity .710

[njk53]

NHRA won't let you use pump 93 octane.

[Mike Croley]

To tune for a different brand of race gas here are some basic rules of thumb,
A change in Specific Gravity of 0.010 requires a change of 1 jet size. That's for leaded racing gasoline. Switching to or from an oxygenated race gas typically requires a change of 3 or 4 jet sizes.

[Mike Croley]

Originally Posted by njk53

NHRA won't let you use pump 93 octane.

No, they don't. Way too many variables among manufacturers for consistent tech. Most racers use a quality 110, but a number of championships have been won with very high octane leaded race gas. The burn rate seems to work very well in some lower CR engine combinations.

[Dave Noll]

As for NHRA approved leaded fuels, C-11 comes in @ 104, & something called "sportsman" comes in @ 107. I copied this from their website for the 11 ...... Recommended for CRs up to 12:1 with restrictor plates and standard flow heads. Anticipate significant HP and torque increases. Used in NHRA Stock and Super Stock.

[Dave Ribeiro]

Mike,

Any chance you or some other company could get a 93-95 octane approved for NHRA/IHRA ??? There 's plenty of cars that would use it, we are now wasting money on gas that doesn't work with our combo's ??? Just a thought?
We don't need all that octane & it actually hurts our combo's ? Thanks..

[Mike Croley]

Yes, there's a very good chance. But the approval process only happens once per season so we'll shoot for next year. Meanwhile, if you aren't running a national series, check the web sites for race fuel that is a better fit for your combination. Renegade lists several for low compression race engines.

[mopacltd]

Is the reference chart referring to the Evan Knoll Torco Fuel or the Arizona Torco Fuel?
I have been told that Renegade is the old Evan Knoll Torco blend and specs.

[Rat Raceway]

Has anyone here switch from VP to Renegade?

Good, bad or the same?