C-16 fuel in a stocker

[Glenn Briglio]

I would check if c11 has enough octane for 13.5 to 1 compression before using it.

[chris ok]

I use C-12 13.8 to 1. Big Block Chevrolet.

[Brett C]

We use C16 in our supercharged Cobra Jets. We used C12 in N/A combos. C25 used in the high end N/A combos.

[Adger Smith]

Try it..
Give the engine combination what it likes.
Once I lost a bet on C-16 during a dyno test.
It made 8 more HP with just a jet change over C-12.
A little more with timing.
Taught me a lesson.
Try it.

[KRatcliff]

Originally Posted by Adger Smith

Try it..
Give the engine combination what it likes.
Once I lost a bet on C-16 during a dyno test.
It made 8 more HP with just a jet change over C-12.
A little more with timing.
Taught me a lesson.
Try it.

An interesting poor boy dyno test for C11. I had put C11 in my 50 cc Zuma since I didn't have anything else at the time. I rode it from the track to the Kroger at Indy one year. The top speed on the scooter was just under 40 mph which almost wasn't enough on that road.

I stopped a convenience store and filled up with regular unleaded. It was worth over 5 mph. That gave me a better idea how much a quicker burning fuel can effect a lower compression engine.

That extra speed gave me comfort as I zipped past the women's prison.

[Adger Smith]

Kyle,
My 1961 172 Cessna with the 0-300 Continental engine was designed for 85 octane fuel. The only aircraft fuel now available is 100LL,
A 100 Octane low lead. It burns so slow and cool that it makes these engines varnish up & stick exhaust valves.
I got an FAA STC to use automotive fuel.
I have found that a 50/50 mix of non Ethanol 87 octane pump gas and 100 LL works best. Climb out power is better & cruse is more economical.
Just like you gave your scooter what it wanted/was happy with, I gave my 0-300 air plane engine what made it happy.
It had too much " Octane" with 100LL.
A few years ago when we were VP dealers they had 54 different fuel blends available. That should really confuse things..lol
Way to many variables and combinations to just guess what works best.

[RPM5595]

I agree with Adger, you really need to experiment with a few different blends and see what works. VP makes good fuel but I am a Renegade dealer and I have been very impressed with the dyno results I have been getting with Renegade. In my opinion you want to use the lightest, fastest burning fuel you can get and jet accordingly. C16 just seems like overkill for your combination to me but as has been stated you just need to try different fuels and see what it likes. If you want to try something different give Renegade a call. Ron Finney has a background in S/SS racing and is a sharp guy.