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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Octane Booster????
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Wed, 31 July 2002 10:19
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I know this might sound like a stupid idea and i have no idea weather it would work at all but its just one of those stupid inventions that popped into my head.
ok now say you got a bottle, filled it up with Octane Booster and connected it between the carb and fuel pump. and had a electronic valve attached so at a press of a button you got a burst of almost pure octane booster (would be slightly diluted with fuel) pumped into the engine, would this give you a sudden increase in engine power? or will an engine only run on octane booster if its mixed within fuel?
anyway just an idea, 
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Re: Octane Booster????
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Wed, 31 July 2002 11:04
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NO
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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Re: Octane Booster????
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Wed, 31 July 2002 11:09
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What's no ment to mean? are you going to at least explain why? as i don't know the chemistry of Octane Booster so would someone be able to explain to me with confidense why this wouldn't work.
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I supported Toymods
Location:
Perth
Registered:
May 2002
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Re: Octane Booster????
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Wed, 31 July 2002 11:12
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The only advantage you are going to get with higher octane is if it is tuned for it.
If you gave it a sudden hit and were able to give it a big dose of ignition timing or something simultaneously, you might achieve something...hardly worth the effort though.
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Re: Octane Booster????
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Wed, 31 July 2002 11:22
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If a dilute mixture of comercial octane booster will clog and trash a set of plugs after only a couple of tanks, imagine what a concentrated dose would do.
COntrary to popular belief , octane booster does not actually make the fuel more explosive or volatile in fact it does the opposite.
Shit fuel goes bang too easy !!
the correct dose of octane booster will lower volatility enough to reduce/ control detonation by promoting even controlled burn at the correct time in the combustion cycle.
any more will lower power. and stuff plugs
Matt
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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Re: Octane Booster????
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Wed, 31 July 2002 11:32
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ok that all makes sense, so whats the deal with NOS is that just simply a highly explosive material?
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Re: Octane Booster????
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Wed, 31 July 2002 11:36
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No NOS introduces additional oxygen into your intake air which allows more fuel to be burnt at the correct a/f ratio allowing more power to be made.
a side benefit is the intercooling effect of the high pressure gas entering the inlet.
Matt
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Location:
Brisbane, QLD, Australia
Registered:
May 2002
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Re: Octane Booster????
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Wed, 31 July 2002 11:37
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All NOS does is give it a shot of nitrous oxide which is just a shot of pure oxygen.
More oxygen, more fuel burnt, less fuel/air ratio, leaner mixture = stuffed engine.
Basically turbo without larger injectors in a can.
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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Re: Octane Booster????
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Wed, 31 July 2002 11:40
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alrighty then, so say avgas isn't more explosive but just more stable thats why an engine runs better on it?
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Re: Octane Booster????
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Wed, 31 July 2002 11:44
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Avgas resists detonation better than standard fuel.
the power advantage would only come after appropriate tuning , unless your engine was already starting to detonate.
Matt
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I supported Toymods
Location:
Berowra-Sydney
Registered:
July 2002
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Re: Octane Booster????
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Wed, 31 July 2002 11:48
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oh ok well thanks for that i'm now a smarter man. 
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Location:
Hobart, Tas
Registered:
May 2002
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Re: Octane Booster????
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Wed, 31 July 2002 13:34
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It's worth adding here that the higher octane a fuel, the less energy (and therefore power) it actually has. Just prevents pinging.
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Re: Octane Booster????
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Wed, 31 July 2002 22:15
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True, however the power gains made by increased compression or boost as well as ign timeing advance far outstrips the loss through less "powerful" fuel.
I think if we could calculate the % of energy actually harnessed in an internal combustion engine we would all be disapointed.
I cant remember off teh top of my head, does anyone remember the efficiencies of the carnot cycle ??
Matt
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Location:
Canberra, ACT
Registered:
May 2002
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Re: Octane Booster????
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Thu, 01 August 2002 00:14
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I think I remember the thermal efficiency of engines these days is like 10-20% or something, but don't quote me on that, it may be lower, but it certainly isn't very good 
-Andrew
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Re: Octane Booster????
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Thu, 01 August 2002 00:53
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I might have to revise some thermodynamics and work it out again.
matt
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Location:
Brisbane, QLD, Australia
Registered:
May 2002
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Re: Octane Booster????
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Thu, 01 August 2002 11:16
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I'm pretty sure an internal combustion engine is only 20% efficent.
I remember 20% efficency from somewhere a long time ago.
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Location:
Townsville
Registered:
July 2002
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Re: Octane Booster????
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Thu, 01 August 2002 11:24
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I havent done any thermodynamics for a couple years either now, but I'm pretty sure combustion engines anywhere between 5-25% efficient (or so)
which is pretty piss poor!
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Location:
Lost in the K hole
Registered:
May 2002
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Re: Octane Booster????
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Thu, 01 August 2002 12:05
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thermodynamics is such a long long way away in my head these days... but i do remember the carnot cycle of heat engines:
and i quote:
The Carnot cycle is a four step process involving two isothermal processes (which are said to be ideal reversible processes) at the temperatures Th and Tc and two adiabatic processes (ie, without heat transfer) which operate between those two temperatures. In the isothermal steps, there is no change in internal energy and the heat exchanged is equal to the work done. In the two adiabatic processes, there is no heat exchanged. No such system can ever be built - since it is an idealized process (the two isothermal steps being reversible and quasistatic which means, in effect, they occur infinitely slowly). The importance of the process is that it gives an upper limit to the efficiency of any cyclic process between the same two temperatures.
be damned if i can remember what that upper limit is tho wrt interal combustion engines.
also wrt the original post question, what your suggesting has basically been done with water/methanol injectors: used to prevent detonation at high boost levels, or to run higher compression in engines not otherwise designed to do so. methanol has a ron of about 112 or 115, + cools the intake charge, and the water helps lower combustion temp, also reducung detonation.
so, yes, you can use an injected octane booster (in conjunction with other strategies) to produce more power, not quite how you anticipated i suspect though 
cheers
ed
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