high octane booster

[neon98style]

does 104+ octane booster really work? I have been mixing 113 racing fuel and 94 premium for many years but am tired of $3.59 per gallon and the 12 mile drive to get the 113.

thanks
Jeff

73 cuda

[Hittman55]

No the octane boost will not work as it supose too! If your lucky it might raise it a point or two. This is coverd in Mopar engine books! Stick with your race fuel. Or think about backing your compression or timing back some!

[Doug Wilson]

It really works. What engine, compression ratio and spark lead are you running? Also, are you using aluminum or iron heads?

[neon98style]

340 .030
11.5 to 1
292-.508 purple shaft
muscle motors ported heads(iron)
air gap intake

[mr_340]

I was told by the local VP Race Fuel rep that mixing the race fuel with super unleaded was more effective than their octane booster. There is some type of limit in transporting TEL in concentrations of more than 4.23ml/gallon. This is the amount of lead (TEL) in most race gasoline. He recommended a mix of 7 parts unleaded to one part race gas for older cars like my '69 340-S. For your compression, you might want to use more race gas than the 7:1 he recommended for me (9:1 CR). I only use it for the lead content, so I usually mix it at 10:1 or more.

[Hittman55]

Some technical info for you guys!
I have tested many grades of gasoline and octane ratings during the coarse of my previous job working for Formally Ashland Oil, now Marothon. Using Reed Vapore Pressure, Testing the ability of a liquid wanting to become a vapor. or evaoperation rate.
Octane being a hydro carbon is just a way of testing the rate of how fast gas will burn. Most people think that the higher the octane level the faster the gas will burn. How ever this is totally oppisite. The slower the gas burns the higher the octane will be. Think about it, the slower burn means the better the flame travel. Detination occurs in high compression engines with low octane, when the gas burns so fast that the piston does not get to the top of the clynder. It acctually rattles because of the piston does not reach top dead center before the gas burns. A longer slower flame will result in a better push and more timing one can run also. I would not matter if you fill your tank with 5 gallons of octane boost it will not perform as the race fuels. Think about it you think by adding a 12 oz bottle of stuff to a full tank of gas will actually change the grade of fuel. Not possiable Octane boost only put a mixture of other things in your fuel to raise octane levels which will only result in a few points. This is only a band aid to a real problem. If this really worked why even bother buying high grade race fuel? Just get the boost. This is even covered in all MOPAR PERFORMANCE ENGINE BOOKS.

[Mr.Mopar]

I just talked to a fuel supplier today about that and he said it is not cost effective to use the octane booster. If you mix premium fuel about 50/50 with 110 octane race fuel you should end up with about 100 octane fuel. It may be a little off either way depending how accurate your measurements are, but not that much. This is what I will run on my 10.2:1 340. Mix and test with a specific gravity tester. 110 octane is .720 SG and 100 octane is .765 SG. The lower the octane the higher the SG.

[Hittman55]

Knowing the specific gravity of octane is cool but would not help the average guy. How would you check this? And to check this would require distillation of pure octane from your fuel. How could this be done. Of coarse the manufactor will tell you this is good stuff. He only knows what hes is told. I am not trying to be a know it all. Just layng out the facts. It will help some. But you could never run more than 10.5:1 cmp with any octane boost with total timing. Runnning 10:1 cmp with octane boost and full timing would result in better perfomance, becuase of timing retard. Also there is a big diff in static compression and dynamic comp. Here is a formula for converting clyinder pressuer from PSI TO KILOPASCALS:::

PSI X 101.3
=========
14.7

[Doug Wilson]

I don't think killing the Pascals will help. All conspiracies are eventually uncovered by a few dedicated and persevering individuals. Yiu can't hide the truth with smokescreens like this!!

[WFO]

yeah,leave the damn pascals alone,haven't they suffered enough?

you can also mix toluene or xylene(3 gallons 92 oct/1 gallon xylene)and it comes out to ~100 octane.common turbo buick trick.


later,sean

[neon98style]

Thanks everyone. I guess I will keep mixing the race gas 50/50.I have never used octane booster and wasn't sure I believed it to be what they say it is.

[hemi-belv]

Any airports close? Try some AV gas.