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Old 06-10-2021, 06:38 PM   #1
hotrods1795
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Default C-16 fuel in a stocker

Do I have to change the timing, is there any advantage in et.

Any information if appreciated.
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Old 06-10-2021, 07:02 PM   #2
GTX JOHN
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Default Re: C-16 fuel in a stocker

Our Demons figure @ 11.8 to 1 and run the best on C11 even
with timing on the edge of Detonation last couple hundred feet.

What combo are you racing and how much compression?
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Old 06-10-2021, 07:18 PM   #3
hotrods1795
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Default Re: C-16 fuel in a stocker

63 Dodge Polara - Max Wedge 13.5-1

Do I need to re-jet carbs or anything with timing?
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Old 06-10-2021, 07:23 PM   #4
mschafer
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Smile Re: C-16 fuel in a stocker

I am not a fuel chemist, but to my knowledge octane reduces detonation in higher compression engines due to slower burn time, in a stocker with lower compression C16 it would only slow it down,as it burns slower, I agree with GTX John on C11.
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Old 06-11-2021, 11:06 AM   #5
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Default Re: C-16 fuel in a stocker

It works good in supercharged engines
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Old 06-11-2021, 08:11 PM   #6
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Default Re: C-16 fuel in a stocker

I would check if c11 has enough octane for 13.5 to 1 compression before using it.
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Old 06-11-2021, 08:22 PM   #7
chris ok
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Default Re: C-16 fuel in a stocker

I use C-12 13.8 to 1. Big Block Chevrolet.
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Old 06-12-2021, 08:43 PM   #8
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Default Re: C-16 fuel in a stocker

We use C16 in our supercharged Cobra Jets. We used C12 in N/A combos. C25 used in the high end N/A combos.
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Old 06-13-2021, 02:26 AM   #9
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Default Re: C-16 fuel in a stocker

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.
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Old 06-13-2021, 06:50 AM   #10
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Default Re: C-16 fuel in a stocker

Quote:
Originally Posted by Adger Smith View Post
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.

Last edited by KRatcliff; 06-13-2021 at 07:01 AM.
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