I would think that any toluene, that is rated at 99% should be good.So to continue on the toluene topic, I would think mixing with meth injected post blower would negate the issue with cold starts right? I would also think even in colder weather that the heat in the engine bay and blower would be an effective warming mechanism depending on where the tank is located right? It would also help that it isnt a wise idea to beat on an engine that isnt at operating temp, I monitor oil temps until they hit 150* and then switch to a different parameter when I lean on the engine a bit.
As far as tracking down a pure source for toluene, aircraft maintenance uses it as a coating stripper and requires an agency certified purity of around 99-99.9% toluene with the balance being benzene. Shipping can cost more than the product, but depending on mix ratios a 5 gallon pail might last long enough to justify it.
My primary concern would be trying to tune for it and knowing what to look for as an indicator you have the right volume of the right mixture of meth and toluene being added to the engine. Im not sure how many tuners have messed with it enough to know what to look for either.
And yes, high contents of toluene can be an 'SOB' to work when it is cold..lol
The F1 group, back when they used high contents of toluene 'Pre-Heated' it.
Those old F1 cars ran 90% Toluene and 58 pounds of boost.
1400 hp from 1.5 liters done many years ago.
Back in the 'Dark Ages' when we use to have to mix our own fuels,
we had an Camaro with what was called a 'Snorkle Snout' hood scoop.
These hood scoops were invented by the 'Chrysler' engineers.
They were called 'Laminar' scoops, versus what the Chevrolet
racers were running at that time, called 'The Grumpy Lump', named
after Bill 'Grumpy' Jenkins who invented that scoop.
The car set records, if we could get it started using a high content of toluene..?
It was really kind of embarrassing, as it backfired back through the scoop.
Sometimes it took 5 - 10 minutes to get the engine to fire after we got to the track.
So my partner who built the engines with me, was standing in front
of the car looking down into the scoop one day.
Yep, you guessed it. . . .It backfired and burned off 1/2 his big mustache..LOL
After that incident, the driver would yell out 'Fire In The Hole'
before he cranked the cold engine over..?
Since the system I defined earlier, which it seems your considering,
is a mix of toluene with a high quality 'Meth', and sprayed after the engine
is warm and running at high throttle tip in conditions, the cold start issue,
and the requirement of heat should be overcome.
I don't think you will be able to finalize the tune 100% on an chassis dyno.
I would also suggest that you use something like HP Tuners to finalize
the tune under actual track / road conditions, particularly when holding the
accelerator pedal down for lengthy periods of time.
Again, I was going to use the toluene, along with E85 in the tank.
The E will help cool the cylinders, as well as set the initial octane floor.
The meth will cool the interior of the intake manifold.
The toluene will help build up / fortify the MON number of the
the oxygenated fuels, which is highly lacking, and if detonated
becomes a highly explosive, as well as a highly destructive detonation.
Stay in touch and report back with your findings. . .