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Thread: Toulene/Xylene based Race Fuel

  1. #1
    One Liter Duc Eater RoughNTough's Avatar
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    Toulene/Xylene based Race Fuel

    Make your very own racin' gas at home(Cut and Paste from another site) FYI, I've used this method for making high octane fuel and it works great! and it's o2 sensor and catalytic convertor friendly.

    ROCKET FUEL?


    Toulene
    R+M/2...114
    Cost...$2.50/gal
    Mixtures with 92 Octane Premium
    10%...94.2 Octane
    20%...96.4 Octane
    30%...98.6 Octane
    Notes: Common ingredient in Octane Boosters in a can. 12-16 ounces will only raise octane 2-3
    *points*, I.e. from 92 to 92.3. Often costs $3-5 for 12-16 ounces, when it can be purchased for
    less than $3/gal at chemical supply houses or paint stores.


    Rocket fuel FAQ
    Copyright 1999,2000 by Eliot Lim This paper may be freely distributed, provided it is
    distributed in its entirety
    Last revised by Eliot Lim: February 8, 2000
    Last augmented by Charles Smith: January 6, 2003


    Background

    In late 1997 I became the lucky owner of 1 out of 150 1998 Porsche 993 Targas, the very last of
    the air cooled classics. As I drove it through the winter of 1997 and into the spring of 1998 I
    noticed that the engine lost some of its sweetness. Since this behavior was strongly related to
    ambient and engine temperature I suspected that the engine electronics were retarding its
    ignition timing due to insufficient fuel octane.

    I started experimenting with octane boosting by first adding small doses of over the counter
    octane boosters and noticed immediate improvement. The engine ran smoother and quieter, was
    more willing to rev and had noticeably sharper throttle response. The octane shortage was
    confirmed by the sticker on the filler cap that stated that 93 octane fuel was needed. Since
    the highest octane rated fuel that was commonly available in Washington state is 92, I decided
    to investigate long term cost effective octane boosting so that I could fully enjoy the
    performance that this car offered.

    My other car at the time, a 1990 Audi V8 quattro had an even more dramatic response to octane
    boosting. I managed to convince a few good friends to try it and the reaction was
    overwhelmingly positive. When I attempted a broader based dissemination of this exciting find,
    I was greeted largely by broad unyielding skepticism and plenty of FUD (fear, uncertainty,
    doubt) regarding toxicity, safety and engine damage. There arose a need to more clearly explain
    the details of octane boosting, hence giving rise to this article.


    Q: Will my car benefit from octane boosting?

    A: Consumer organizations have effectively emphasized the larger markups that oil companies
    charge for high octane gasoline, implying that for most vehicles higher octane fuel is a
    complete waste of money. It has been quite a long time since the consumer alert was issued.
    Since then engine technology has evolved greatly, while people's perceptions generally have
    not.

    Modern vehicles now use computerized engine management systems that can react to engine knock
    and retard ignition timing if low octane fuel is being used. Consequently cars are now being
    manufactured with very high compression ratios that appear to give good fuel economy and at the
    same time good performance. This combination does assume that fuel of adequate octane is being
    used.


    Q: Why bother to boost octane at all since my engine can run just fine on lower octane fuel?

    A: For a high compression engine to run on low octane fuel, the engine management system will
    need to retard the ignition timing to prevent preignition or pinging. Retarding the ignition
    timing means that the firing of the spark plug is delayed until a later moment in the
    compression stroke. It does not take much to see that a later onset of combustion means that
    the combustion is less complete, which in turn mean less power and poorer fuel economy. It is
    possible that the casual driver will still come out ahead in terms of saving money by using low
    octane fuel, but the ******** ignition advance also means a rougher running engine and a much
    duller throttle response. Thus octane boosting is not necessarily of interest to all motorists
    but rather the enthusiasts.

    For turbocharged or supercharged engines, insufficient octane will also lead the engine
    management system to curtail the amount of boost which in turn defeats the purpose of these
    engines.


    Q: How did you discover using toluene?

    A: Someone came across a web page that described various DIY home brew octane booster formulas.
    One of which used toluene as its main ingredient. As a Formula 1 racing fan of many years, I
    recalled that toluene was used extensively in the turbo era in the 1980s by all the Formula 1
    teams. The 1.5 liter turbocharged engines ran as much as 5 bars of boost (73 psi) in qualifying
    and 4 bars (59 psi) in the actual race. Power output exceeded 1500bhp, which translates into
    1000bhp/liter, an astronomical figure.

    A motorsports journalist, Ian Bamsey, was able to obtain Honda's cooperation for his book
    "McLaren Honda Turbo, a Technical Appraisal". The book documents the key role that the toluene
    fuel played in allowing these tiny engines to run so much turbo boost without detonation. The
    term "rocket fuel" originated from the Formula 1 fraternity as an affectionate nickname to
    describe its devastating potency. Thus I concluded that I should focus my research on using
    toluene for my octane boosting project.

    Individuals with good long term memory will recall that when unleaded gasoline was first
    introduced, only low octane grades were available. While it is not entirely clear that high
    octane super unleaded gas came about as a result of the advances in fuel technology in Formula
    1, there is every reason to suspect that this is indeed the case, since many of the major oil
    companies were involved in the escalating race to develop increasingly potent racing fuel
    during this era.


    Q: Why do you think toluene is better than other types of octane boosters?

    A: Several reasons:

    Mindful of the evil reputation of octane boosters in general, toluene is a very safe choice
    because it is one of the main octane boosters used by oil companies in producing ordinary
    gasoline of all grades. Thus if toluene is indeed harmful to your engine as feared, your engine
    would have disintegrated long, long ago since ordinary pump gasoline can contain as much as 50%
    aromatic hydrocarbons.

    Toluene is a pure hydrocarbon (C7H8). i.e. it contains only hydrogen and carbon atoms. It
    belongs to a particular category of hydrocarbons called aromatic hydrocarbons. Complete
    combustion of toluene yields CO2 and H2O. This fact ensures that the entire emission control
    system such as the catalyst and oxygen sensor of your car is unaffected. There are no metallic
    compounds (lead, magnesium etc), no nitro compounds and no oxygen atoms in toluene. It is made
    up of exactly the same ingredients as ordinary gasoline. In fact it is one of the main
    ingredients of gasoline.

    Toluene has a RON octane rating of 121 and a MON rating of 107, leading to a (R+M)/2 rating of
    114. (R+M)/2 is how ordinary fuels are rated in the US. Note that toluene has a sensitivity
    rating of 121-107=14. This compares favorably with alcohols which have sensitivities in the
    20-30 range. The more sensitive a fuel is the more its performance degrades under load.
    Toluene's low sensitivity means that it is an excellent fuel for a heavily loaded engine.

    Toluene is denser than ordinary gasoline (0.87 g/mL vs. 0.72-0.74) and contains more energy per
    unit volume. Thus combustion of toluene leads to more energy being liberated and thus more
    power generated. This is in contrast to oxygenated octane boosters like ethanol or MTBE which
    contain less energy per unit volume compared to gasoline. The higher heating value of toluene
    also means that the exhaust gases contain more kinetic energy, which in turn means that there
    is more energy to drive turbocharger vanes. In practical terms this is experienced as a faster
    onset of turbo boost.

    Chevron's published composition of 100 octane aviation fuel shows that toluene comprises up to
    14% alone and is the predominant aromatic hydrocarbon. Unfortunately composition specifications
    for automotive gasoline is harder to pin down due to constantly changing requirements.

    Chevron's web site also describes the problems of ethanol being used in gasoline.

    MTBE was heavily touted as a clean additive several years ago, and became a key ingredient in
    reformulated gasoline that is sold in California. But recently new studies arose that showed
    that MTBE was far more toxic than previously imagined. Organizations such as oxybusters have
    formed around the country to eliminate the use of MTBE in gasoline and several states,
    including California have passed new laws to eventually outlaw MTBE.
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  2. #2
    One Liter Duc Eater RoughNTough's Avatar
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    continued


    Q: How much toluene should I use per tank of gas?

    A: Octane ratings can be very easily calculated by simple averaging. For example, the tank of
    an Audi A4 1.8TQ is 15.6 gallons. Filling it with 14.6 gallons of 92 octane and 1 gallon of
    toluene (114 octane) will yield a fuel mix of:

    (14.6 * 92) + (1 * 114) / 15.6 = 93.4

    The Audi A4 1.8T is a good example of a car that has very high octane needs if it has been
    modified to produce more turbo boost. The base compression ratio of this car is a very high
    9.5:1 and when an additional 1 bar (14.7 psi) of turbo boost is applied on top of it, the
    resulting effective compression ratio is way beyond what 92 or 93 octane fuel can ever hope to
    cope with. Most modified 1.8Ts running without octane enhancement are running with severely
    ******** ignition timing and boost.


    Q: Will toluene damage my engine or other parts of my car?

    A: A 5 or 10% increase in the aromatic content of gas will most likely be well within the
    refining specifications of gasoline defined by ASTM D4814, which specify an aromatic content of
    between 20% and 45%. What this means is that if the 92 octane gas that you started off with had
    an aromatic content of say 30% and you increased it by 10% to 40% you would still be left with
    a mix that meets the industry definition of gasoline. So the above question would amount to:
    "Will gasoline damage my engine or other parts of my car?"

    Even in the unlikely event that the 92 octane gas has a aromatic content of 45% the resulting
    mix would still be within the bounds of gasoline sold in other countries.


    Q: Isn't toluene an extremely toxic substance?

    A: The common perception of toluene's toxicity far exceeds reality. Fortunately there is an
    ample body of information available that specifically addresses this question. Toluene is more
    toxic than gasoline but it is certainly not agent orange or cyanide. See the Agency for Toxic
    Substances link below in the reference section.

    US Environmental Protection Agency Chemical Summary

    US Agency for Toxic Substances and Disease Registry (ATSDR)

    National priority list of toxic substances
    Note that the ATSDR also rates gasoline as a hazardous substance.

    Mobil's spec sheet for toluene even goes as far as saying that "Based on available
    toxicological information, it has been determined that this product poses no significant health
    risk when used and handled properly."


    Q: Isn't toluene an active ingredient of TNT (trinitrotoluene) and is thus deadly?

    A: In the same way that cotton wool is the base ingredient of nitrocellulose (guncotton) which
    in turn is the main ingredient in modern smokeless gunpowder. Using this reasoning one could
    conclude that cotton wool is a deadly substance. This question reflects a poor understanding of
    basic chemistry but unfortunately it has been asked often enough.


    Q: How much does toluene cost, and where can I buy some?

    A: $10/gallon in a one gallon can at a hardware store, about $6/gallon in a 5 gallon can from a
    chemical supply or paint store, or $3/gallon in a 55 gallon drum from a chemical supply
    warehouse.

    A2: Experience of Charlie Smith in 2002. Sherwin Williams paint stores have it for $5.00 in a
    gallon can. They can order it in a 5 gallon can at $4.00 / gallon. They can order 55 gallon
    drums for about the same cost per gallon, but you have to have a dock unloading facility to get
    the drum(s) off of the delivery truck.


    Q: Can I just dump in 100% toluene into the tank like the F1 racers? vroom vroom vroom

    A: First of all, the F1 racers did not use 100% toluene, but 84%. The other 16% in their brew
    is n-heptane, which has an octane rating of zero. The reason for this strange combination is
    because the F1 rocket fuel was limited to the rules to being of 102 RON octane. The n-heptane
    is "filler" to make the fuel comply with the rules.

    Because toluene is such an effective anti knock fuel it also means that it is more difficult to
    ignite at low temperatures. The Formula 1 cars that ran on 84% toluene needed to have hot
    radiator air diverted to heat its fuel tank to 70C to assist its vaporization. Thus too strong
    a concentration of toluene will lead to poor cold start and running characteristics. I
    recommend that the concentration of toluene used to not exceed what the engine is capable of
    utilizing. i.e. Experiment with small increases in concentration until you can no longer detect
    an improvement.


    Q: Why not simply use racing gasoline or aviation fuel?

    A1: Most types of aviation fuel have very high lead content, which would rule out cars equipped
    with catalytic converters. Most piston engined aircraft burn leaded fuel. Also aviation fuel
    has a very different hydrocarbon mix to optimize volatility properties at high altitude.

    A2: Racing gasoline could be a much more convenient way to run high octane fuel compared to
    having to constantly mix in toluene with each fill up. There are, however a few caveats:


    You don't know for sure if you are really getting what is being advertised. You should find out
    if the fuel inspectors verify the actual octane of the racing gasoline in addition to ordinary
    gasoline. If you paid $3/gallon and only got 94 or 95 octane instead of 100 octane you may
    conclude erroneously that your car does not benefit from octane boosting.

    You don't know what octane boosters are used in the racing gasoline. The worst case scenario is
    buying leaded racing gasoline without knowing it. Unleaded racing gasoline may still contain
    damaging octane boosters like MMT or methanol. A very high alcohol content will lead to fuel
    line erosion, accelerated fuel pump wear, very poor fuel economy and possibly lower
    performance, as alcohols have a less impressive MON rating than aromatics.

    It takes smaller quantities of toluene to achieve the same octane boost compared to 100 octane
    racing gas. I have not seen unleaded racing gas for sale that exceeds the octane rating of
    toluene.

    Since toluene is not officially sold as a fuel, gas taxes do not apply. Also racing gasoline
    tend to have higher markups being of interest to the performance minded enthusiast and thus is
    very likely to be more expensive to buy and use long term than toluene, which is typically used
    in more mundane applications like paint thinner.

    Q: Ok, what is the catch?

    A: It should be mentioned that in the US, efforts are underway to reduce the aromatic content
    of gasolines in general as a higher aromatic content leads to higher benzene emissions. Benzene
    is an extremely toxic substance. However it should also be noted that the proportions that is
    being discussed in this FAQ is relatively small and in the grand scheme of things is probably
    insignificant. Moreover, the industrial standard for defining gasoline composition allows
    plenty of leeway in aromatic content and the proportions present in US gas is already lower
    than most other countries. I therefore feel that the information provided here is useful to a
    performance minded car enthusiast while not being significantly detrimental to the environment.
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  3. #3
    One Liter Duc Eater RoughNTough's Avatar
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    one more....

    Q: What safety measures can you recommend in handling toluene?

    A: The following is a good reference guide:


    Q: Do you have testimonies of others who have tried this?

    A: Some samples of feedback is reprinted with the names removed below. You may contact me if
    you wish to contact the respondents directly.



    --------------------------------------------------------------------------------

    Since I didn't have any reference point for how much to use, I dumped about a half gallon of
    this mix into a mostly empty tank (the GT has a 16 gallon tank) and then filled up with Chevron
    92 octane.
    I didn't get to drive the car until PIR the next morning, (my GF doesn't like the 200; it's too
    big) but the report was that there was no change for a mile or so, and then all of a sudden,
    the engine seemed to smooth out and became quite eager to rev and run.
    Well, by that calculation, I only managed to bump the octane to just shy of 93, but it seemed
    to make a big difference. I ran the car hard all day, (for reference, it's got an '87 MC turbo
    motor, K26, 12psi boost, and currently no intercooler) and even at 12 pounds of boost, I never
    once felt the ECU backing the timing off. Granted, the ambient temps never got above 50, and my
    water and oil temps were rock solid. (Oil just pushing above 100C)

    The only cars that I had to get out of the way for was an Integra Type R and a couple of
    race-prepped P-cars. I even managed to lap the NSX once! It was a really good day!


    --------------------------------------------------------------------------------

    Okay, kids, gather round. This is important: we spend lots of money for our car, lot of money
    modifying and taking care of it, lots of effort and pride in owning it. So if someone comes
    along and proposes to give you something that would increase your enjoyment in driving by
    exponential measures and it would only cost you two or three bucks per tank of gas, would you
    be suspicious like the 100MPG carburetors? Would you listen long enough to real-life
    testimonies to consider this improvement for yourself?
    Well, this is the case for Toluene and what it can do for your V8Q if you been using anything
    less than 92+ octane. Get some.Try it. No harm, no risk. Use about 24-32 ounces per 1/2 to full
    tank. You will not look debonair. You will have to suspend your "cool" look. You may want to
    try this alone. YOU WILL HAVE THE ****TEST, MOST PLASTER, GRIN ON YOUR FACE YOU HAVE EVER HAD!
    It won't come off. You'll tell the kids, daddy has his own "transformer". It will be like a new
    car...no, better than new!
    I took my family out to dinner tonight and could hardly keep from dropping it into manual and
    showing off like some teenager (I don't think my 17 year old daughter was inpressed). I wanna
    see some posts here with personal experiences by you guys using this stuff - I wanna know that
    my car is normal and hasn't been deprived ever since I've owned it.


    --------------------------------------------------------------------------------

    I did the Rocket Fuel thing tonight on my Extremely Modified 5KCSTQ that runs 24 PSI of
    boost... And I can tell you not only does my ears and my butt say that the Rocket fuel is doing
    it's job but My ECU Data logger that gives me the timing value for all 5 cyls says it's working
    too.
    Before Rocket Fuel I was running full retard (14 Deg of timing) on boost and would still on
    occasion get some knock, now I'm getting timing numbers around 22 Deg's with ZERO knock ever.
    I'm running 2 Gallons of Toluene 7oz of ATF and 17.5 gals of 93 oct gas for a net octane of
    95.15. I'm next going to try 3 Gallons of Toluene (96.23 Octane) to see what timing numbers I
    get.


    --------------------------------------------------------------------------------

    After being convinced that my car was running below it potential - Owners manual recommends
    octane rating between 95 and 99, although it_will_run on octane as low as 91 - I stopped by
    Sherwin Williams and picked up a gallon. It was on sale for $5.85! Anyway, head to the chevron
    and pour a half gallon into the tank before pumping in the premium. The car took 16 gallons so
    there was still 4 gallons in the tank. I take off....nothing (obviously burning the fuel still
    in the lines). About 10 miles later, HOLY SH*****T!!!!!!!!!! It really does everything
    advertised by the list. It is so much more responsive from a stop and low speed, it really is
    impressive. I would agree with the sentiment that it feels like a totally different car.
    For the non believers, you really should try to get some higher octane fuel in your tank,
    whether through the use of Toluene or not. The owners manual recommends 95 to 99 octane** for
    optimal performance. With the half gallon of Toluene I added to the 92 octane, I was only
    running at approximately 92.6 octane and the difference was simply amazing!

    If you haven't tried it, do yourself a favor and give it a whirl - I swear you'll be impressed.

    (**note: this person confused RON octane mentioned in the owners manual with R+M/2 octane that
    is sold in the pump. 95-99 RON is roughly equivalent to 91-94 R+M/2)


    --------------------------------------------------------------------------------

    After trying rocket fuel for two weeks, I can only say I love it.
    The first tank, however, was a disappointment. I think I did not add enough of rocket fuel for
    the first tank. So I added a little more for my second tank, it ran better but not too much
    improvement. Then on my 3rd tank, what a difference, the car feels like a "Rocket" now, even
    though it is an "Auto". I always feel there is more power available for me.

    I think for my 1st and 2nd tank, I did not have enough rocket fuel in it, even though I added
    one gallon per tank. Then, on my 3rd tank, I had enough because of the left overs from my 1st
    and 2nd tank. (I fill up my tank at about the 1/4 mark). Now I only have about 2 gallons of
    rocket fuel left, I better get more now!!! :-)


    --------------------------------------------------------------------------------

    Reference materials:


    1. Gasoline FAQ

    2. McLaren Honda Turbo - a technical appraisal
    Ian Bamsey
    ISBN 0-85429-840-1, published 1990

    3. Chevron's excellent Motor Gasolines Technical Review

    4. Agency for Toxic Substances FAQ on Toluene
    In summary:
    Use in a well ventilated area, don't drink even a little of it, and
    report spills of more than 1000 pounds to the National Response Center

    5. Toxic Chemicals in your Environment (Australia) FAQ on Toluene
    In summary:
    this "Total Environment Center" likes a totally chemical free environment,
    and even at that they can't find fault about much more than acute exposure
    cases, and they also say not to drink any of it.
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  4. #4
    AMA Pit Boss yeller_twin's Avatar
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    I gave up, but from what I did read, this sounds like they are on to something.

    I hear a science project brewing......

  5. #5
    One Liter Duc Eater RoughNTough's Avatar
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    It's purdy simply. Mix X parts toulene to X parts gasoline= X r+m/2


    The equation for determining octane level is
    (total amount of gas * octane rating of gas) + (total amount of toulene * 114)/ total amount of fluid in gas tank= actual r+m/2

    So if you've got 3 gallons of 93 octane in your tiller and add 1/2 gallon to top it off you'd have
    (3*93)+(.5*114)/3.5= 112.428571 octane fuel
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  6. #6
    GP Champ TL4LIFE's Avatar
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    Uhhh, you do it first in your TLS and we'll see how she runs

    I'm guessing that the peeps with reduced squish and high compression setup's would benefit from this way more than the stock engine right

  7. #7
    TLRChad
    Guest
    I was adding just toluene to my fuel last year to boost up the octane. Works fine, no probs. Really though, if your not running higher than stock compression your just wasting your money, IMHO. I could tell a difference when running 92 octane pump gas and the 96 octane I was mixing. The 92 pump gas works better. The higher the octane, the slower the burn. Unless you've got that compression up there around 13:1 you really don't need it. Hell, even some of the guys here are still running straight pump gas after boosting up the compression with no probs.

    Great info though Rough Certainly a heck of a lot cheaper than buying octane booster or race fuel.
    Last edited by TLRChad; 04-06-2004 at 08:12 PM.

  8. #8
    AMA Pit Boss yeller_twin's Avatar
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    I run straight pump gas with higher compression.

    Another advantage of higher octane fuel is the slow burn. This means you can advance your ignition without detonation. This will build higher cylinder pressure. More cyinder pressure means more power. More power through out the entire rev range. I get chills just thinking about it.

    I almost spent $3 a gallon to get turbo blue fuel today. It has 102 octane rating. Plus it smells super great when it's burnt. Almost as good as race fuel. How does this toulene/gas mix smell? Like regular gas or does it have that sweet smell of race fuel?

  9. #9
    tiller1000
    Guest
    Ahhh the sweet smell of race fuel.

  10. #10
    One Liter Duc Eater RoughNTough's Avatar
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    It doesn't smell like race fuel, that's for sure. It smells like fuel and chemical...surprisingly enough.

    To see if it truely did help with knock, I bumped my timing to 22* without a hint of ping in 90* weather. After that I was sold, except for the fact that local police officers do check in with paint suppliers, agricultural suppliers, and pharmacies. Toulene is a big ingredient in meyth.
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