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2014-04-19 13:00:00 GMT+00:00
Where can I get 112 octane gas for Vintage?
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DrChip
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Joined: 08 Aug 2008
Posts: 2437
Score: 41988
Location: Atlanta, GA

PostPosted: Fri Feb 08, 2013 4:32 pm    Post subject: Reply with quote

No arguments here. Trying to keep my engines from sticking.

Running Blenzol caster and at least 8oz to gallon of gas

Remember, West Bend 820s are industrial engines used on tampers, pumps and even drones, designed to run at lower constant RPMs. The technology dates back to the 1960s. They are not the more sophisticated engines that you mentioned.

One constant is that 820s need to run very fat, to the plug fouling fat on air/fuel ratios,

Opinions, even from the Yamaha and Rotax owners, differ greatly on the oil and octane to be used..c
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DrChip
Club President


Joined: 08 Aug 2008
Posts: 2437
Score: 41988
Location: Atlanta, GA

PostPosted: Fri Feb 08, 2013 10:35 pm    Post subject: Reply with quote

JW-you did mention using higher octane gas for the Yamahas and Rotaxs. I was running 87 octane. I did over rev one of the two engines last year at Barnesville when I lost a chain on one engine. And with all 4 engines, I was running them too lean.

I blew one of two engines on the dual at little Talledega GP track, which is a larger track. I put a rod through the case on one, ran the other ran as a single many laps with no problem.

Engines may have been geared too low for duals, over reving them. Also it is hard to monitor both engines running together. I plan to monitor rpms and temps better with TWO gauges. c
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Michael Jackson



Joined: 11 Apr 2006
Posts: 516
Score: 5330
Location: Lithia Springs Ga.

PostPosted: Sat Feb 09, 2013 9:40 am    Post subject: Reply with quote

http://www.turbofast.com.au/racefuel1.html

Read this and it will explain all about fuel. Your engine fuel mixture actually says 24-1 with 87 octane. Since you are operating it on a kart 93 octane will be plenty. Acetone is used in methanol for aid in cold starting and helps keep the oil in suspension and also help with water dispersal that accumulates in methanol. AV gas is designed for higher altitudes and has a lower Reid Vapor Pressurer than regular gas. Race gas is designed for race engines and high compression engines which you do not have. If you decide that you must have race gas I would cut 110 with regular 87 50% each which would give you 98., still not needed but would go farther and is cheaper than 98 race gas. 5% toulene added to 93 would be similiar to octane booster you buy at auto parts store and you can control it better with tolulene. Hp in a can is a slippery slope. Still think 93 & 8 oz. should be the ticket for your engines. Oil usually only drops the octane at most 2 points. Higher octane when not needed will actually hurt performance.
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