A Good Octane Boost?
 

Have always used 104 octane boost. Is threre anything comparitable at a lower cost? Thanks

Stop using that now! It does virtually nothing to raise the octane raiting. Do a search, this subject has been discussed several times.

That 104 stuff is virtually worthless boosting at octane.
Use some toluene or hiigh octane race fuel. What octane do you need???

Where Do You Buy Toluene

Menards.Home Depot, Sherwin williams paintstore has 55 gallon drums :ernaehrung004:

$217 for a 55 gallon drum at my local chemical plant. Is that a good deal, $3.95 a gallon?

What is cheaper Toluene or Race gas. I am sure that someone has done the cost analysis

You will not buy race gas for 217 a drum !!!!!!!!!!!!!!!! And like what was already said you might just as well buy beer and piss in the tank as buy octane booster of any kind . :eek:

Toluene:ernaehrung004:

I would say Toluene if you buy it in 55 gallon drums. If you're buying it by the gallon, it might be toss up vs 114+ race fuel.

Toluene when mixed with pump gas works well as a knock retardant on low to moderate boost applications. It is not a substitute for race fuel or safe to run on high boost applications on pump gas only.
We run 10% toluene to our 93 octane mix up to 8 lbs of boost or so running 565ci inner cooled high helix 14-71s and then inject methanol or run straight race fuel beyond that.

:drink:

octane boost.....
 

Octane boost is almost a scam, or it should be; Example if your running 91.0 octane then add 104+ it will only change the octane rating to like 91.104. This test has been in HOT ROD, and CAR CRAFT magazine many times, the octane is added AFTER the decimal point.
( this has been explained in lamens terms so if anyone has the more tech explenation all comments welcome) So technically it does increase the rating, but you wont ever notice the difference. Ill Say it again " all you cowboys spend tons of cash on bling, then cheap out and skimp on oil, filters and more important- fuel !!

Anyway thats the basics, if I offended anybody well sorry. But it's the truth.

Last year I melted a piston, motor builder thought it was fuel. Rebuilt motor to 760 hp, he said 93 may not be quite enough. I have questioned whether I'm always getting 93, so I just want to be sure I stay around 93. What would the maximim octane I could be at and be safe? Thought about adding enough to allow if the fuel would happen to be 89?

We bump the 93 up to 100 and still start spraying Methanol at 6lbs of boost ... good luck :ernaehrung004:

So their is no detrimental effect running toluene up to 30%?

TETRAETHYL LEAD

http://www.batterystuff.com/fuel-treatments/OS6q.html

know guys running it for years with no problems,and even spraying it at 9lbs boost plus :ernaehrung004:

Found this...
Toluene can be used as an octane booster in gasoline fuels used in internal combustion engines. Toluene at 86% by volume fueled all the turbo Formula 1 teams in the 1980s, first pioneered by the Honda team. The remaining 14% was a "filler" of n-heptane, to reduce the octane to meet Formula 1 fuel restrictions. Toluene at 100% can be used as a fuel for both two-stroke and four-stroke engines; however, due to the density of the fuel and other factors, the fuel does not vaporize easily unless preheated to 70 degrees Celsius (Honda accomplished this in their Formula 1 cars by routing the fuel lines through the muffler system to heat the fuel). Toluene also poses similar problems as alcohol fuels, as it eats through standard rubber fuel lines and has no lubricating properties as standard gasoline does, which can break down fuel pumps and cause upper cylinder bore wear.

I just priced a drum from my local Sherwin Williams. $7.25 a gallon in 55 gallon drum. Has anyone else priced it lately? I can by racing fuel for that kind of money.

So what % Toluene would raise 89 octane fuel to 93 octane?

Robert,

5:1 (20%) Toluene will elevate 89 (R+M)/2, to 93.166 (R+M)/2 octane. The math on determining the ratio is fairly simple. Rather than attach a spreadsheet, I have a conversion sheet that was sent to me for original octane vs. blended octane w/ toluene below. It can be printed and used in the field.
Credit unknown.

Bob

Bob,

Thanks! I guess another question would be what is the minimum octane I would need with 8.75:1 CR, iron heads and 5 lbs of boost? I know it runs fine on 93 octane on the dyno. Don't mean to hijack the thread here :rolleyes:.

Cool! Thanks. Answer = stick with 93 octane. 11.725:1 @ 5 psi.

Your eyes must be better than mine!

I priced mine at a local chem supply house. $217 for 55gal = $3.95 a gallon.

$7.25 a gallon is Insane BIG Daddy , we pay $200.00 a drum and pick up 10 to 12 barrels at a time . Buy a 10.00 box of business cards and open a commercial account at Sherwin Williams under Daytona Painting Co ... they may be qouting you off the street prices.. good luck:ernaehrung004:

I have had good luck with this stuff in motorcycles, both HD and turbocharged sport bikes (5 psi with stock pistons).

Good stuff, can get a good price from Kemco oil.