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CC Advertisers
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09-11-2011, 10:36 PM
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CC Member
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Join Date: Jun 2006
Cobra Make, Engine:
Posts: 58
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Not Ranked
octane b00st
what is the best octane boost that we can still get now that the EPA has taken all of the good stuff off the shelves?
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09-11-2011, 11:26 PM
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CC Member
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Join Date: Sep 2009
Location: Camarillo,
CA
Cobra Make, Engine: SPF #2608, Roush 427SR T-W
Posts: 911
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Not Ranked
You won't like it.... Ethanol. E85 is over 100 octane. You have to make sure your fuel system can take the high ethanol (no rubber, all steel). You may also be surprised to hear E85 may only have 70% ethanol. Pretty funny.
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09-12-2011, 04:34 AM
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Senior Club Cobra Member
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Join Date: Dec 2001
Location: Shasta Lake,
CA
Cobra Make, Engine:
Posts: 26,597
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Not Ranked
I quit using that stuff years ago and just add a little of my racing gas to the tank. It seems to add a lot of power and I get better gas mileage. None of the additives we get up here are worth the price of the bottle they are in.
Ron  |
09-12-2011, 06:00 AM
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CC Member
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Join Date: Jul 2011
Location: Peoria Illinois,
il
Cobra Make, Engine: Superformance #678
Posts: 264
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Not Ranked
I have 10.5/1 compression in my 302 and run a 50/50 mix of turbo blue and premium fuel........ she likes it.
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09-12-2011, 02:30 PM
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CC Member
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Join Date: Oct 2008
Location: Lions Bay,
BC
Cobra Make, Engine: CAN-AM cobra, 460 SVO
Posts: 326
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Not Ranked
__________________
Mark
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09-12-2011, 06:39 PM
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CC Member
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Join Date: Oct 2003
Location: Queen Creek,
AZ
Cobra Make, Engine: Midstates, Vette suspension, Baer 6P brakes, 540 cid Chevy, Haltech Fuel Injection
Posts: 906
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Not Ranked
You can add toluene. Thats what most of the octane boost products were anyway...
__________________
E. Wood
ItBites
10.69 @ 129.83mph - on pump gas and street tires
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09-12-2011, 07:00 PM
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CC Member
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Join Date: Jun 2001
Location: Mesa,
AZ
Cobra Make, Engine: ERA #2119 289FIA
Posts: 5,380
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Not Ranked
I came up with these formulas from a Turbo Buick Web Site. They did stress the need for a good respirator and caution since the fumes are carcenigens (sp)
Toulene with 92 octane gasoline
10%....94.2 octane
20%....96.4 octane
30%....98.6 octane
Xylene with 92 octane gasoline
10%,,,,,94.5 octane
20%.....97.0 octane
30%.....99.5 octane
Methyl-tertiary-butyl-ether (MTBE) with 92 octane gasoline
10%.....94.6 octane
20%.....97.2 octane
30%.....99.8 octane
The site also stresses that higher concentrates do not improve the ratings and may be hazardous to vehicle and/or operator.
I understand that these chemicals may be available at chemical suppliers or some paint supply stores. Sure beats paying $5-$10 for a can of booster that will only raise your octane rating 2/10ths or 3/10ths of one octane.
__________________
Karlos
"In the Land of the Pigs, The Butcher is King"
Last edited by Karl Bebout; 09-12-2011 at 07:03 PM..
Reason: Spelling
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09-14-2011, 08:16 PM
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CC Member
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Join Date: Apr 2009
Location: Little Rock area,
AR
Cobra Make, Engine: ERA Street Roadster #782 with 459 cu in FE KC engine, toploader, 3.31
Posts: 4,527
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Not Ranked
If you really believe you need an Octane Booster - this is the stuff to get - Kemco. Not cheap and won't win you any points with the environmentalists. Has to be mail ordered. Real lead for off-road use.
Octane Supreme 130, 12-32oz. |
09-15-2011, 02:52 AM
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CC Member
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Join Date: May 2008
Location: Brisbane,
QLD
Cobra Make, Engine:
Posts: 2,797
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Not Ranked
Quote:
Originally Posted by WardL
You won't like it.... Ethanol. E85 is over 100 octane. You have to make sure your fuel system can take the high ethanol (no rubber, all steel). You may also be surprised to hear E85 may only have 70% ethanol. Pretty funny.
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All very true, but the engine needs to be tuned for E85.
Ethanol runs a richer stoichiometric ratio than petrol, about 9.6 vs 14.7.
__________________
Gary
Gold Certified Holden Technician
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09-15-2011, 04:28 AM
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CC Member
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Join Date: Aug 2000
Location: Chicago,
IL
Cobra Make, Engine: ERA 454 S.O.
Posts: 1,684
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Not Ranked
Can I ask what you need it for?
__________________
Jeff
“If you can make black marks on a straight from the time you turn out of a corner until the braking point of the next turn, then you have enough horsepower.”
Mark Donahue
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