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Jon Smith
Joined: 08 Feb 2006
Posts: 67
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 Posted: Mon Oct 05, 2009 12:39 pm Post subject: Mixing race 98 with pump 92 |
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Greetings.
We've got a race Wednesday night and I've been out of town and unable to get to Kartorama for 98 octane fuel. I've got 1 gallon of 98 octane left in my container (not the kart tank). The Briggs manual says run 98 or 93.
Can I mix 1 gallon of pump 92 in with one gallon of race 98 and call it good for the evening? It's a club race so I'm not as concerned about tech as I am effecting the motor.
Thanks. |
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John Matthews
Joined: 04 Dec 2004
Posts: 1993
Location: United States, Michigan, Williamsburg
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| Posted: Mon Oct 05, 2009 2:35 pm Post subject: |
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As long as you're not worried about tech you should be fine. I've run Formulas and Animals on pump gas and never had a problem. Some pump fuels have funny additives that will change the plug color but if it's just for an evening and you go back to VP or whatever I can't see it being any issue. Back in the old days we just ran pump gas and never had a problem, IMHO the spec fuel thing is just to make things easy on tech....
If you are worried then pick up a carb rebuild kit when you get the new fuel. It's probably time anyway 
Cheers,
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John Matthews
Heartbeat Power, LLC. |
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Paul Hutt
Joined: 26 Sep 2009
Posts: 388
Location: United States, Washington, Olympia
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| Posted: Wed Oct 07, 2009 6:06 pm Post subject: Confused |
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I just bought a kart with Briggs & Stration racing enging. I was told that I must use 110 octand.
?????  |
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Bernie Lacotta
Joined: 21 Mar 2006
Posts: 168
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| Posted: Wed Oct 07, 2009 8:37 pm Post subject: Re: Confused |
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| Paul Hutt wrote: | I just bought a kart with Briggs & Stration racing enging. I was told that I must use 110 octand.
????? |
Don't know what kind of Briggs engine you have but no stock Briggs engine requires 110 octane. WF has around a 9.5 comp. ratio and that is easily covered 91 oct. If the engine has been modified you may need higher octane but not for a stock class Briggs engine.
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I breathe ,therefore,I race |
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Craig Drabik
Joined: 09 Jun 2009
Posts: 73
Location: United States, New York, Buffalo
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| Posted: Thu Oct 08, 2009 5:41 am Post subject: |
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| Batavia runs world formulas on pump gas (93 octane from a specific Sunoco station according to the rulebook). No fuel related problems. |
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Paul Hutt
Joined: 26 Sep 2009
Posts: 388
Location: United States, Washington, Olympia
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| Posted: Fri Oct 09, 2009 7:24 am Post subject: Your Correct |
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I talked to the shop, which is going out of business, and they said 92 octane is just find.
They also said it runs better with 95 to 96 octane and 110 is over the top.
Finding race gas is such a pain in the ass that I can not understand why he said this.
What improvement do you get using 95 octane? |
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Paul Hutt
Joined: 26 Sep 2009
Posts: 388
Location: United States, Washington, Olympia
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| Posted: Fri Oct 09, 2009 7:25 am Post subject: Your Correct |
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I talked to the shop, which is going out of business, and they said 92 octane is just find.
They also said it runs better with 95 to 96 octane and 110 is over the top.
Finding race gas is such a pain in the ass that I can not understand why he said this.
What improvement do you get using 95 octane? |
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Bernie Lacotta
Joined: 21 Mar 2006
Posts: 168
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| Posted: Fri Oct 09, 2009 12:21 pm Post subject: Re: Your Correct |
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| Paul Hutt wrote: | I talked to the shop, which is going out of business, and they said 92 octane is just find.
They also said it runs better with 95 to 96 octane and 110 is over the top.
Finding race gas is such a pain in the ass that I can not understand why he said this.
What improvement do you get using 95 octane? |
There is no advantage with the higher octane in a stock Briggs engine. Higher octane may actually hinder max performance. Tracks may require a spec racing fuel but that is only for consistency in fuel checks. Pump gas varies seasonally and regionally in it's formula, basically making fuel check impossible. I'd use pump premium for non competitive outings , race gas if required for racing. Don't mix them if you want to pass fuel check.
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I breathe ,therefore,I race |
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charles hunter
Joined: 28 Apr 2007
Posts: 732
Location: United States, California, anaheim
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| Posted: Fri Oct 09, 2009 4:52 pm Post subject: |
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How's it Bernie??? Swampwater Smyth here. I was usin Arco 87 octane for the race at Adams that day and check my lap times on Mylaps for the first practice session. Then I got pooped out!! Me, Ted, Mike and the So-cal Sprinters thank you for making the journey to Riverside and really look forward to seeing you again 
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swampwater smyth concurs "If you aint first, yer last."
------------------>DRSWAMP RACING INC<----------------- |
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Bernie Lacotta
Joined: 21 Mar 2006
Posts: 168
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| Posted: Fri Oct 09, 2009 5:35 pm Post subject: |
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| charles hunter wrote: | | How's it Bernie??? Swampwater Smyth here. I was usin Arco 87 octane for the race at Adams that day and check my lap times on Mylaps for the first practice session. Then I got pooped out!! Me, Ted, Mike and the So-cal Sprinters thank you for making the journey to Riverside and really look forward to seeing you again |
Dr. Swamp ! I had a great time , definitely coming back. Seriously considering running your entire schedule. All depends on the racing here but I must admit , despite the hotter than Phoenix temps , it was one of the most enjoyable race days I ever had. I can't thank you , Ted , Mike , and the entire club enough for the fantastic hospitality. Bernie
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I breathe ,therefore,I race |
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