C-16 fuel in a stocker

hotrods1795 · 06-10-2021, 07:38 PM

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

Any information if appreciated.

GTX JOHN · 06-10-2021, 08:02 PM

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?

hotrods1795 · 06-10-2021, 08:18 PM

63 Dodge Polara - Max Wedge 13.5-1

Do I need to re-jet carbs or anything with timing?

mschafer · 06-10-2021, 08:23 PM

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.

Race Clean · 06-11-2021, 12:06 PM

It works good in supercharged engines

Glenn Briglio · 06-11-2021, 09:11 PM

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

chris ok · 06-11-2021, 09:22 PM

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

Brett C · 06-12-2021, 09:43 PM

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 · 06-13-2021, 03:26 AM

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 · 06-13-2021, 07:50 AM

Quote:

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.

06-10-2021, 07:38 PM	#1
hotrods1795 Junior Member Join Date: Dec 2007 Posts: 38 Likes: 0 Liked 2 Times in 2 Posts	C-16 fuel in a stocker Do I have to change the timing, is there any advantage in et. Any information if appreciated.

06-10-2021, 08:02 PM	#2
GTX JOHN VIP Member Join Date: Jun 2009 Location: Boulder City, Nevada 89005 Posts: 2,732 Likes: 2,798 Liked 2,479 Times in 697 Posts	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? __________________ John Irving 741 Stock 741 Super Stock

06-10-2021, 08:18 PM	#3
hotrods1795 Junior Member Join Date: Dec 2007 Posts: 38 Likes: 0 Liked 2 Times in 2 Posts	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?

06-10-2021, 08:23 PM	#4
mschafer Junior Member Join Date: Oct 2014 Posts: 44 Likes: 0 Liked 13 Times in 9 Posts	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.

06-11-2021, 12:06 PM	#5
Race Clean Member Join Date: Aug 2017 Posts: 159 Likes: 18 Liked 129 Times in 53 Posts	Re: C-16 fuel in a stocker It works good in supercharged engines __________________ Stop global whining

06-11-2021, 09:11 PM	#6
Glenn Briglio VIP Member Join Date: Nov 2002 Location: Massapequa Park,NY Posts: 1,281 Likes: 1,893 Liked 969 Times in 307 Posts	Re: C-16 fuel in a stocker I would check if c11 has enough octane for 13.5 to 1 compression before using it. __________________ 1989 Camaro Iroc-Z I/SA B&B Auto Machine Shop.

06-11-2021, 09:22 PM	#7
chris ok Senior Member Join Date: Jul 2002 Location: Long Island, New york Posts: 592 Likes: 131 Liked 46 Times in 29 Posts	Re: C-16 fuel in a stocker I use C-12 13.8 to 1. Big Block Chevrolet.

06-12-2021, 09:43 PM	#8
Brett C VIP Member Join Date: Oct 2011 Location: Thibodaux, LA Posts: 1,195 Likes: 327 Liked 1,018 Times in 217 Posts	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. __________________ Brett Candies 4192 Stock/SS God Bless America

06-13-2021, 03:26 AM	#9
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	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. __________________ Adger Smith (Former SS)