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- Path: sparky!uunet!decwrl!infopiz!lupine!motcsd!udc!mcdphx!ennews!gtephx!rakoczynskij
- Newsgroups: rec.autos.tech
- Subject: Re: octane boosters (was Re: Broquet: Fuel Catalyst)
- Message-ID: <1992Sep4.172606.14013@gtephx.UUCP>
- From: rakoczynskij@gtephx.UUCP (Jurek Rakoczynski)
- Date: 4 Sep 92 17:26:06 GMT
- References: <3970062@hpsad.sad.hp.com> <03jn7va@dixie.com> <24526@oasys.dt.navy.mil>
- Organization: AG Communication Systems, Phoenix, Arizona
- Lines: 60
-
- In article <24526@oasys.dt.navy.mil>, samblane@oasys.dt.navy.mil (Sean Samblanet) writes:
- > In rec.autos.tech, jgd@dixie.com (John De Armond) writes:
- > :ggg@hpsad.sad.hp.com (Gary Goodlund) writes:
- > :(stuff deleted)
- > :>I'd like to find another product that reduced detonation effectively
- > :>but didn't cause these problems. So far, I haven't seen anything on
- > :>the market in Northern California.
- > :
- > :Easy. Good old fashioned toluene. At about $1.60 a gallon in 50 gallon
- > :lots (recent quotes) and at a rate of about a quart per tank for about
- > :3 or 4 points octane boost, it's about a cheap as you can get and no
- > :fouling.
- > :
- > :John
- > A question along these lines. Does toluene or 104 octane boost or any
- > octane booster raise the octane rating the same amount for 87 octane
- > as 93 or 94 premium fuel? 100 octane fuel is much more expensive($3.50/gal)
- > and hard to find. Can any additive boost 94 octane to about 100 octane?
- >
- > Sean
-
- It's a function of percentage octane boost to a certain octane
- gasoline, but no one is going to get that complicated on a can:
- "If your gasoline is x octane and n gallons then 1 can miracle
- additive = x1 new octane rating!". But it really doesn't make that
- much differance to worry about. Gasoline blends probably vary too
- much from month to month, batch to batch to say it is exactly 87
- octane, or 92 octane. I'll leave the math to you as an excercise, but
- here are some numbers you can run through your calulator (in the US,
- we use the (R+M)/2 column):
-
- Compound Research Octane Motor Octane R+M/2
-
- Isooctane 100 100 100
- Xylene 118 115 116.5
- Toluene 120 109 114.5
- Benzene 120+(exceed capability of octane rating machine)
-
- Source: Circle Track & Racing Technology, Jan 1992
- Which quoted the source:
- Automotive_Fuels_Handbook by Keith Owen & Trevor Coley
- Published by Society_of_Automotive_Engineers
-
- The SAE book list price is US $125.00.
-
- Just follow John's guidelines. But if you think more is better, keep
- this in mind (this is only partial info I have ...I'm still collecting
- info): Toluene has a higher boiling point and is why it does a good
- job in cleaning valve stems and engine deposits. But it does not burn
- completely in stociometric(sp?) ratios, forming instead a soot (this
- is in one of the chem books at home), just sending your unburnt HC
- levels up... unless you have an excess of oxygen, like most cars do at
- cruise/idle. This has to do with the way the benzene ring reacts. So
- don't get carried away with additives, as miracle cures.
-
- --
- Jurek Rakoczynski, AG Communication Systems, POB 52179, Phoenix, AZ. 85072
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