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I was told by Mike Danniballe at Sterling that the only way to boost octane of pump gas is to add high octane race gas. Advertised "octane boosters" absolutely do not boost octane of any levels of fuel. If you need 93 octane for your motors, but can only get 87 octane at the pumps, you will need to cut the fuel 1/3 with 110 octane race gas to end up at 93 octane. I only need 91 octane for the Merc 700s in my 36, so when I know I can only get 87 octane, I need to cut my fuel 20% with 110 race gas to end up at 91 octane. The octane level of race gas you buy depends on the percentage you need to cut the fuel by. It's simple math, and leaded race gas is always recommended over low-lead 100 octane av-gas.
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I went the 110 route a few times but that can be a real challenge if your traveling on the water. I have even stationed cans where I'm going but that is a real pain in the as .
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Originally Posted by Skater30
(Post 4810332)
I was told by Mike Danniballe at Sterling that the only way to boost octane of pump gas is to add high octane race gas. Advertised "octane boosters" absolutely do not boost octane of any levels of fuel. If you need 93 octane for your motors, but can only get 87 octane at the pumps, you will need to cut the fuel 1/3 with 110 octane race gas to end up at 93 octane. I only need 91 octane for the Merc 700s in my 36, so when I know I can only get 87 octane, I need to cut my fuel 20% with 110 race gas to end up at 91 octane. The octane level of race gas you buy depends on the percentage you need to cut the fuel by. It's simple math, and leaded race gas is always recommended over low-lead 100 octane av-gas.
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Down here that is one reason I do not want anything that needs more then 90, its what you find on the water and a lot of times we go through more then a tank in a day. At least with a boosted injected motor you could have it pull timing or try to stay out of boost but what fun is that?
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Originally Posted by F14A water jet
(Post 4809959)
I am looking for first hand experience in octane boosters. My engine builder says 91-92 octane. As the subject line says, my local marinas only seem to carry mostly 87. After some research, I have decided to keep some BOOSTane (Marine) octane booster in the boat. According to the mix charts, I should be able to use 1/3 ounce per gallon (one ounce per 3 gallons) to boost 4-5 boost numbers (from 87 to 91/92).
Has anyone successfully (or more importantly un-successfully) utilized this product as described? Thanks! |
I have tried Octane Boosters, But the Best was To buy TRICK FUEL is 110% ( 10 % ) in the tank with you 87% Octane Worked Great, In My 28' Bertram Baron Special.
350 Mag. Eng, squared out 350 hp.each. |
Octane
I run a Donzi Blackhawk with a supercharged 502 with good heads and bottom end it's carbureted and running Boostane allowed me to advance my timing when I went to more pitch. It seems to do a good job.
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Originally Posted by bertram
(Post 4811021)
I have tried Octane Boosters, But the Best was To buy TRICK FUEL is 110% ( 10 % ) in the tank with you 87% Octane Worked Great, In My 28' Bertram Baron Special.
350 Mag. Eng, squared out 350 hp.each. My basic math calculation says that I would have to carry/add ~28 gallons of 110 to 100 gallons of 87 to get 128 gallons of 92. |
Originally Posted by KarlKostman
(Post 4811030)
I run a Donzi Blackhawk with a supercharged 502 with good heads and bottom end it's carbureted and running Boostane allowed me to advance my timing when I went to more pitch. It seems to do a good job.
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I would not risk blowing an expensive engine using octane boosters. Hard to believe less than an ounce of something can raise the octane of one gal of gas. This has been debated for years on many forums and the general consensus is octane boosters are not what they claim.
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