C 12 side note

Shawn S.Kvaas · 06-17-2013, 07:31 PM

The c12 fuel I ran in my car this weekend at mission was from last July when I bought it for Woodburn. I had half a tank sitting in the car since then, and 3 plastic 5 gallon jugs sitting under a tree in my back yard out in the elements. all this fuel tested perfectly every time.

Ed Wright · 06-17-2013, 08:42 PM

Quote:

Originally Posted by Shawn S.Kvaas

The c12 fuel I ran in my car this weekend at mission was from last July when I bought it for Woodburn. I had half a tank sitting in the car since then, and 3 plastic 5 gallon jugs sitting under a tree in my back yard out in the elements. all this fuel tested perfectly every time.

I ran the first race this year on left-from-last-year C11. It had been in the plastic jugs in my trailer over the winter. Checked perfectly, "right in the middle" they told me. Never a problem with C11.

Darrin Christen · 06-17-2013, 10:03 PM

Quote:

Originally Posted by Ed Wright

I ran the first race this year on left-from-last-year C11. It had been in the plastic jugs in my trailer over the winter. Checked perfectly, "right in the middle" they told me. Never a problem with C11.

Only problem with C-11 is the price! Lower octane, yet cost more than some of the higher octane fuels.

Ed Wright · 06-18-2013, 08:57 AM

Quote:

Originally Posted by Darrin Christen

Only problem with C-11 is the price! Lower octane, yet cost more than some of the higher octane fuels.

Darren, in my car it's a tad faster on C11 after adding about 5% WOT air/fuel. More octane than you need costs a little power. Of course, in slow down mode that doesn't matter. :-)

KRatcliff · 06-18-2013, 09:49 AM

Isn't C-11 a little quicker burn rate than C-12? No?

Lower octane doesn't hurt as long as you are not detonating. A quicker burn rate is....well....quicker.

I can see how C12 would check ok in Mission. I think it has a harder time in the heat of our area if not properly stored. And sometimes it will be marginal right out of the drum.

This also may be due to their testing equipment at the tracks.

Dave Ley · 06-18-2013, 10:05 AM

C11 has a much lower specific gravity than C12. The lower the specific gravity the faster it burns. Faster burning means more power. You aren't paying for octane you are paying for the properties that make it have a lower specific gravity.

Crew Chief · 06-18-2013, 10:52 AM

Quote:

Originally Posted by KRatcliff

This also may be due to their testing equipment at the tracks.

How is it that most everyone passes and only a few fail? If the testing equipment was bad wouldn't everyone fail?

06-17-2013, 07:31 PM	#1
Shawn S.Kvaas Junior Member Join Date: Mar 2008 Location: Pitt Meadows, B.C. Posts: 47 Likes: 0 Liked 1 Time in 1 Post	C 12 side note The c12 fuel I ran in my car this weekend at mission was from last July when I bought it for Woodburn. I had half a tank sitting in the car since then, and 3 plastic 5 gallon jugs sitting under a tree in my back yard out in the elements. all this fuel tested perfectly every time.

06-18-2013, 09:49 AM	#5
KRatcliff Senior Member Join Date: Sep 2011 Posts: 763 Likes: 75 Liked 524 Times in 141 Posts	Re: C 12 side note Isn't C-11 a little quicker burn rate than C-12? No? Lower octane doesn't hurt as long as you are not detonating. A quicker burn rate is....well....quicker. I can see how C12 would check ok in Mission. I think it has a harder time in the heat of our area if not properly stored. And sometimes it will be marginal right out of the drum. This also may be due to their testing equipment at the tracks.

06-18-2013, 10:05 AM	#6
Dave Ley Member Join Date: May 2008 Location: South Jersey , The 51st. State Posts: 424 Likes: 1,794 Liked 241 Times in 44 Posts	Re: C 12 side note C11 has a much lower specific gravity than C12. The lower the specific gravity the faster it burns. Faster burning means more power. You aren't paying for octane you are paying for the properties that make it have a lower specific gravity. __________________ Dave Ley