Search found 77 matches

by JasonL
Wed Mar 27, 2024 8:35 am
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

The detail on my estimate of fuel savings by going to 87 octane. I've rounded the numbers to keep the math easier... I keep close records of our karting (and other spending). Last year, we spent $350 on kart fuel. This was between our two Rotax karts, covering 9 races and many more T&T and coach...
by JasonL
Fri Mar 22, 2024 11:32 am
Forum: Pit Talk
Topic: Alternate Race Formats, Awards and Track Records
Replies: 2
Views: 191

Re: Alternate Race Formats, Awards and Track Records

My two cents - if it's worth that much... On trophies for the podium sitter each race - They seem not to be very expensive, so I suspect that savings for eliminating them would not be significant. I suspect the younger races may appreciate them more than the older folks. There have been a few occasi...
by JasonL
Sun Mar 17, 2024 7:33 pm
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

10%
by JasonL
Sat Mar 16, 2024 8:48 pm
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

Carson and I were at the track today and I stopped at the Co-op to get some gas to test. It had ethanol in it.
by JasonL
Mon Mar 04, 2024 2:00 pm
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

I’ve found the ratio for manual jetting. Pure ethanol wants 1.6 times more air than gasoline for optimal combustion. At a 10% blend, that means we should be going with jetting 6% bigger than with pure gasoline. We’ve been focusing on the main jet - but this would also impact the needle jet - any ide...
by JasonL
Sat Mar 02, 2024 12:09 pm
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

Sites won't go back and forth - aside from some disruption that forces them away from their typical supply point. With federal and province carbon & cap and trade regs, use of non-ethanol gasoline is much more expensive for suppliers. This is why things are moving to E15. Fuel producers/importe...
by JasonL
Sat Mar 02, 2024 12:02 pm
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

Co-op was the last hold-out with non-ethanol gasoline and started converting their sites in late 2022. It's possible that where you sourced your sample from had not yet converted. Sites won't go back and forth - aside from some disruption that forces them away from their typical supply point. With f...
by JasonL
Sat Mar 02, 2024 10:01 am
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

I hadn’t factored that the club moved to ethanol gasoline in 2023 into my jet choice ‘algorithm’. I’ll be sure to adjust this season.

Not that many of us follow the Rotax app recommendations, but I wonder what type of fuel they assume in their calculations.
by JasonL
Fri Mar 01, 2024 10:44 pm
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

Alberta’s not on the horizon for E15 right now. If/when it happens in any jurisdiction, it won’t go back again.
by JasonL
Fri Mar 01, 2024 6:07 pm
Forum: Pit Talk
Topic: Fuel talk - octane, ethanol, etc.
Replies: 23
Views: 1970

Re: Fuel talk - octane, ethanol, etc.

Jack, That is my understanding. Hydrogen atoms in any fuel are what burns. A computer-controlled engine is going to adjust things to hit a certain air/fuel (hydrogen/oxygen) ratio. Ethanol and other alcohols contains oxygen atoms in their molecules, so the computer will automatically increase the am...