NefMoto

I want to make some experiment with high octane fuel. But in my county is not posible to get one. We only have RON 95 and RON 98 with 5% etanol
So i decidet to make my own, but need some of your sugestion if someone try this or do some research about this.
First cheap option is mix acetone with fuel.
Acetone is cheap one,  it is 60% cheaper than petrol but can't find information how much octane does it have and how hamerful for engine is.

Second option is alcohol. I can get 96% etil alcohol,  price is twice expensive than a petrol.
So mixing  96%etil alcohol(113 octane) with RON 98 petrol, in proportion 50/50 I can get about 105 octane

Third option is octane boosters something like this
https://www.merlinmotorsport.co.uk/p/silkolene-pro-boost-octane-improver-oct-b
datasheet say that mixing 1.5% can give 0.5-2 MON, max mixing is 3%

So if I have luck i can get 3-4MON aprox 6-7RON   98+7=105RON
That doesen't give me too much hope,and it is too expensive.

Soo what you say? one thing you must know, I drive car at cruise speed 95% of time, and it runs on LPG. This mixture in tank will be only for experiment and some WOT

1. Acetone(0.5€/L)  petrol (1.15€/L) with 20:80 mix at 50L cost about 55€  octane number: uknown?
2. Alcohol (2.5€/L) petrol with 50:50 mix at 50L cost about 90€,  octane number : around 105
3. 2L octane booster (40€) with petrol at 50L cost more than a 90€, octane number 101-105

Any neighboring countries nearby? .... or you can just get a WMI kit

No only RON 100, 50-60 km from my home. The first E85 is 600-700 km away
If I put WMI kit, still couldn't find where to buy methanol.  Only maybe nitro methanol for RC cars

50 km is nothing and you can always fill up gasoline tanks and just bring it home.

A lot of chemical companies sell methanol, it is nothing special. Just call some of them and ask.

Brazil is a fucked country but at least we have E98 (98% ethanol + 2% water) almost every where.

I don't think you understand me, I can only buy 100 octane, but I need more than that

Thank for advice, will try

Send me some  ;D

In my country it is also dificult to buy methanol, only available to chemical companies. Even washer fluides now have litle to none methanol, EU rules.
E85 is also a no no and also 98 is getting hard to find on some places.

Its a conspiration against tuned cars :)

I think I will make my own E50. For one tank of fuel that is not expensive. It can last me for 2 moths

I'm pretty fine running 1.8bar boost with cr8.5 and 95ron with 20 deg ign

This is some sort of experiment what I want to achive.  But I want to consult on forum, and at the end share results with forum
If you want, it will be good to post your log, it will be help for me

Come to Budapest and I can source you as many hundred liters as you want :)

metanol?

sure, there is no upper limit for private persons, so you can buy 200l if you want

You have LPG dont you ? It has an octane rating up to 110. Its price is also less than an euro here per liter, sure its weaker than petrol a tiny bit , but even with compensanting for that its way cheaper than petrol / liter.

Can you get propane or toulene they both have ridicolous octane ratings.

Anyway we have basically 98 ron at almost every station. They one I use next to me is 98 ron + e10 + other crap ( never read the full description) , its very good, on weekends its the same price as regural 95 ron so I usually fill up on weekends only.

LPG doesn't have colling efect, it is good for cheap drive, but not for tuning.

IS the E50 hamrful for fuel pump,lines injectors?

Also I think I found methanol, that system make a huge interest on me, and now I will try to build something by my own

Be very careful on methanol tuning  ::)

I will be ceraful, if you have some sugestions, feel free to say it

Also LPG does have cooling effect with evaporation, where did you read it does not ?

That proces is hapening in reducer. It is outside the engine

Methanol is not usable as main fuel source on any road car, it must be drained after each run etc, it's extremely poisonous and dangerous, forget it...

Just mix 50/50 alcohol and you will be fine, won't be any knock.

Maybe there is some airfield next to you where you can buy some leaded fuel? ;D But i think it will be similar to 100 octane, in past it was used for tuning, but now there is also normal 102 octane fuel available...

F**k leaded fuel.

Acetone is good one aswell it actually has an octane rating of about 110. Might be better for price vs alko. Not sure on fuel system effects, but its a natural cleaner so I dont think it would cause any issues?

Heres a good read.

https://www.sciencedirect.com/science/article/pii/S2215098615302469

" Experimental results showed that the AC3 (3 vol.% acetone + 97 vol.% gasoline) blended fuel has an advantage over the neat gasoline in exhaust gases temperature, in-cylinder pressure, brake power, torque and volumetric efficiency by about 0.8%, 2.3%, 1.3%, 0.45% and 0.9%, respectively.

As the acetone content increases in the blends, as the engine performance improved where the best performance obtained in this study at the blended fuel of AC10. In particular, exhaust gases temperature, in-cylinder pressure, brake power, torque and volumetric efficiency increase by about 5%, 10.5%, 5.2%, 2.1% and 3.2%, respectively, compared to neat gasoline. In addition, the use of acetone with gasoline fuel reduces exhaust emissions averagely by about 43% for carbon monoxide, 32% for carbon dioxide and 33% for the unburnt hydrocarbons.

The enhanced engine performance and pollutant emissions are attributed to the higher oxygen content, slight leaning effect, lower knock tendency and high flame speeds of acetone, compared to the neat gasoline. "

toluene is superior to acetone imo if you are going that route.

Well OP depends on price, and I dont think toulene is as available as acetone for the average person?  Even if you try paint thinner who knows what other stuff is in that mix, need to be careful with that.

Also paint thinners contain tourpentine usually and thats shit is harmful af.

Toluene is dangerous. Better to use ethanol.

why need to be drained after each run?

Because its highly dangerous , you cant even get it on your skin. You are better off with Toulene then then its one of the ingridients in race fuel anyway.

I think we are talking of wmi and not methanol as primary fuel.

oh dear God, did you ever see methanol in your life?

Yes.. And he bloody explained why you should not use it.. 3 options , alcohol - safest, acetone - slightly toxic, no good against rubber or plastic if used in high concentration, toluene - toxic, very good octane. Or simply cng or and liquified propane and other gases.


And @armageddon , his post is not for wmi but actual fuel.

Nobody uses lpg here it's a waste of time.

water/meth is extremely common for add on injection, toluene as a fuel additive is also extremely common as it is by far the best octane booster by volume.

alcohol and acetone are alsorans.

My post is for WMI, I am not planing to use metanol as primar fuel. Only 50:50 etanol and petrol. And aditional WMI to see how the engine behevier.
My friend drive a race car on 100% methanol,
Touline is hard to get these days.

It was not clear from your post that you are talking about WMI.

I thought you were going to try to put it in your fuel tank, which is a really shitty idea on a road car.

methanol is only poisonous if you drink it, I don't see how/why anyone would drink from the tank??
I've used it as the primary fuel in many RC aircraft engines(and it's not just me btw)

The thread is called DIY high octane fuel, and in your first post you say you want to make a high octane fuel....

Sorry for missunderstend, I didn't make myselft 100%
From this point my plan is to run on E50
And aditional WMI, that sistem I will build by my own. That wmi made a huge interest on me.

My friend told me, when he run on alcholo, all ruber hoses gets hard, and need to be changed every year

replace rubber with silicon hoses

Great idea  ;)

Bullshit... live in Brazil... all imported cars came here without any change in hoses and we have  E27 long time ago.

Even cars I convert to E100 dont have this issue...

It seemed like OP was diy high octane main fuel. Anyway for injection, just use toluene, hell buy it from here 25L costs 38 euros, and you wont have knock for sure. Or if you dont want , just acetone, as long as you dont use any rubber in the system.

My closest local station just upgraded the 98 octane to  100 RON E10 yesterday, Im quite damn happy, I just bought a can of it. Its costs the same as previous and the same as 95 octane on weekends :) Normal price is 1.31 euro / L currently.

Meth is fine for injection, i'd only use toluene to mix with main fuel.

That is not true, methanol vapors and methanol exhaust is very toxic.
When you tune a car with methanol as primary fuel on the dyno it is a very very good idea to wear a gas mask.

Do you have a source on that?

This wiki says "While methanol offers somewhat different toxicity exposure pathways, the effective toxicity is no worse than those of benzene or gasoline, and methanol poisoning is far easier to treat successfully. "

https://en.wikipedia.org/wiki/Methanol_fuel#Toxicity

CH4 + O2 = CO2 + H2O

Nitromethane you need a gasmask, that stuff is nasty... I can only be around top fuel card for a little bit before my eyes are burning and it's hard to breathe.

Bringing this back...

I can not get Toluene, but can get acetone and isopropanol.

Acetone is bad for plastics/rubbers and toxic.

What about isopropanol? It is similar to ethanol..