William Robison
Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline
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JHillyer:
[QUOTE]Originally posted by jhillyer
So, octane.
I buy and use locally California's crap vaporware 91 octane petrol. I also mix additives for noticeable performance if not overdone. [/QUOTE]
The CARB is yet another reason for living somewhere else.
[QUOTE]I remain varying amounts, but a recent blend has helped: base 91 octane, acetone (and perhaps blend of toluene, methanol, etc.), small amount of high-temp cleaning lubricant (sometimes Mystery Oil), and a soft metal suspension such as a lead replacement with lithium (no lead). I though I felt more low torque with mineral like it actually burns off, and late. For some reason I worry about trying castor oil. [/QUOTE]
I prefer the toluene to the acetone, they have similar properties but the acetone tends to evaporate from the fuel more rapidly. In other words a toluene mix stays fresh longer. To get any real effect from methanol (or ethanol) the percentage has to be so high that the carb has to be re-jetted, or the injection re-calibrated. This is why "Gasohol" is farcical, at best.
[QUOTE]For the record, toluene and toluol are marketed as distinct chemicals. They are distinct in >99.99% pure form too, by odor, as I've used both from a biological supply company where labelling mistakes are rare (and I'm not going to perform chemical tests to verify the compound). To me, the toluene odor is much more tolerable. The 'ol form give one the bitter-beer face.[/QUOTE]
I always thought the "'ol" was a technical grade of "'ene," but I've always used the "'ene."
[QUOTE]The valves make a nice wet pop sound at low rpm with lubed heat-hungry fuel. Next, would I be insane to try a miniscule of lube-solid suspension oil like Redline's heavy crank/trans/diff synthetic? Disregard the peripheral annoyances of emissions and catalyzed exhaust. [/QUOTE]
To hear the valves "Pop" at low rpm you must be running an open exhaust. Running an open exhaust you must be off-road. If you're off-road and don't want to spend the bucks forthe fancy injection, use carbs. That will take some bucks, but they're easier to set up. Considering an oil mix - I used to use a polyoxide based top oil, from Wakeflied, branded "Castrollo." The "Castrol" brand is now being packaged and sold by a USA company, and I've not seen "Castrollo" since the change. I think "Steen's C" is similar. Use it if you wish, but it will not add any power. The polyoxide oils burn cleanly, leaving no residue.
[QUOTE]I've noticed ambient air temperature greatly affecting burn of my fuel mixes. I don't have the budget to have an ECU manage the just-in-time mix of these materials automatically. I just premix and dump into the tank. One mix has a cold engine into a torque monster, another mix has it choking with an accelerator punch but a power monster above 3500 rpm, but change the outdoor temperature over 35 degrees (yeah, daily desert flux of CA USA weather) and the behavior may totally confuse. This indicates ignorance within the stock ECU firmware and sensory, and my own. [/QUOTE]
Your Audi should have the Bosch Ku Jetronic injection, if it is operating properly there should be no discernable difference in engine run between cold and hot ambient temperatures, using the same fuel. So it's not a matter of ECU "Ignorance," but probably a failed sensor. Have it checked, if you don't have the tools required to do your own.
Hope this helps, at least a bit.
Fly twin engined planes,
. Lot of fun, but still some pains.
Bill.
_____________________________
Real Airplanes have Two Engines
AMA 25139 - More than 40 years.
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> Toluol in Fuel = Octane Boost ??!! 
Toluol in Fuel = Octane Boost ??!! - 
Toluol in Fuel = Octane Boost ??!! - 
Toluol in Fuel = Octane Boost ??!! - 
