DIY 100 Octane Gasoline

[DWF Engineering]

If anyone out there is looking to increase boost, increase copmression, or just advance your ignition timing you should take a look. First I'd like to say that I'm running 4 more degrees advance than a stock KA on my engine and have been for over a year now. At first I ran into a loss in low end and heavy knocking around 4500 rpm. Both of these problems were corrected with an S-AFC increasing the amount of fuel being delivered to each cylinder. The additional fuel would disperse the heat and stop the knocking. This works but a mixture this rich is not as efficient as a leaner one with a high anti knock index fuel.

The octane boosters you buy at your general retail stores are mostly toluene and won't increase you octane rating much at all unless you add several gallons of the stuff and that could get expensive. Lots of older (or younger back-woods) folks in the hot rod circles say to use aviation gas because its "100 octane". This is kinda true but it is 100 RON (research octane number) which equates to about 91 AKI (anti knock index) auto gas. So its really just over priced 91 octane leaded fuel. Guess what lead does to your cat and O2 sensor. Hint: its not good. You could buy racing fuel but isn't that like $4.00/gal?

Remember how I said octane boosters are toluene? You can buy toluene at a paint supply store for about $3.00/gal (vs. $3.00/little nothing bottle of octane booster). The AKI (if it actually had one) of toluene is about 114. Get 5 gallons of this in your tank and then fill the rest of your tank with 93 AKI premium unleaded. This will make a 99.6 AKI blend and if your 93 octane fuel costs $2.00/gal it should cost just $36.75 a full tank. This is roughly 1/2 the cost of a full tank of race gas.

So now instead of having your tuning limited by the pump gas you should be able to go to a little wilder setting, get a few extra ponies, and protect your engine from harmful knock without forking over the cash for race gas.

[anlasak]

Are you actually running this mix in your engine?

So you're running 1 part toulene/2 parts premium pump gas?

How long have you been running this mixture?

What kind of gas mileage are you getting?

Does your engine run any hotter compared to just pump gas?

Any fuel or oil leaks since you started using the 1/2 mix?

What does your car idle at with the 1/2 mix?

Any valetrain/drivetrain problems since starting the 1/2 mix?

[R.W.240]

I talked to a real racer about this and the answer I got was "Hell no". Tolene is hard as hell on the seals on your engine so if your gonna add more (theres already some in the gas) you need to run ATF too. I will never do either...

Just run Race gas when you need to. you dont need a 12.5:1 Full Thottle A/F when running granny to the airport.

[nissanfanatic]

Pump gas supports 16psi on a KA. Which is about 340whp for the guys without super-hero tuning systems. Knocking is not caused by lean mixtures. Pre-ignition is caused by lean conditions which is how you melt pistons. Knocking is usually caused by having your timing advanced too far. Pre-ignition can lead to knocking though.

[sidewayzS13]

i have a friend that has a talon tsi and it talked about this in his service manual from the factory

[AWDSR20]

talon ?!
Ok ok let me get this straight, in the TALON manual they talked abut how to advance the timing of the car, so u can hit 60 in 19.5 sec. Wow, they actually think that it could go fast huh? Any other tuner help too? like how to install a turbo to a talon, that would be nice…
LOL, just messing around!

[AWDSR20]

Originally Posted by DWF Engineering

The octane boosters you buy at your general retail stores are mostly toluene and won't increase you octane rating much at all unless you add several gallons of the stuff and that could get expensive. Lots of older (or younger back-woods) folks in the hot rod circles say to use aviation gas because its "100 octane". This is kinda true but it is 100 RON (research octane number) which equates to about 91 AKI (anti knock index) auto gas. So its really just over priced 91 octane leaded fuel. Guess what lead does to your cat and O2 sensor. Hint: its not good. You could buy racing fuel but isn't that like $4.00/gal?

.

First I have to say tnxs for the post, u put effort in to it.
Second, I’m sorry but buying toluene from a paint shop and dumping it in ur car will have a catastrophic effect on ur car. WHY?
First, TRUE C7H8 (also known as methylbenzene or phenylmethane ) is used as Octane "booster" in fuel and for paint, rubber, TNT ,lacquer...etc
U CANOT guarantee that ur being sold pure toluene when u buy it as a pain thinner for an example... its like saying I need water so i will buy carbonated water, its different.

What I’m trying to say that the substance is found in many products and just buying paint thinner and dumping it in ur car is not so smart.

i can go technical on that subject, after all I’m a 3rd year chem. Engineering student, so I do have books and resources that I can share with u if ur interested.

BTW, go on line there are alllllllllooot of info out there about chem, read it ad u will understand my point of view.

Cool?

[logik23]

Next he's ganna tell us to dump sugar in the gas to get that sweet exhaust tone.

[nissanfanatic]

A better example is oil. It is all crude oil kinda like they are both hydrocarbons, but you don't put 85w oil in your engine. Just like you don't put 5w in your gearbox. Just do yourself a favor and leave race gas for when you're making over 400whp.

I like AWD turbo talons. A friend of mine had one and it sounded soooooo good with a Greddy type S. Looked like shit though.hahahahahaha Truly a $999.00 for turbo parts and $1.00 for zip ties to hold the bumper on kind of guy. Just like me.hahahaha

[B34ST1Y]

but didnt he just say you can pick up the CHEMICAL itself in a paint shop? I dont' think he's saying go put PAINT THINNER into your tank ^_^ . lol,



~yea I'll bet CAT LITTER works good for a good octane booster!

[nissanfanatic]

Old post, but I'm glad you brought it up.

Instead of higher octane fuel, Water/Alcohol injection can work as well. It just cools the intake charge much better than only an intercooler. Hypsi was telling me that he was running 26psi or so with like 26* timing advance on pump gas. I'm planning on running it soon.

[klone420]

Why not just brew some grain alcohol? Like killin 2 birds with one shot.

[monooxide]

If your wanting....say 30+whp from using a higher octane and you are too lazy or cheap to buy some Blue 103...wtf is your problem and give me your car.

[monooxide]

Wait what nissanfanatic said was that we can push like 16psi on pump gas now is that 89 or 93?Also how can Supra's push like 25-30 and use 93?

[nissanfanatic]

Water/Alcohol injection cools the intake charge considerably. So higher ocatne fuel is no longer needed to push more boost. 25psi is not out of the question on pump gas when running a good WI setup. On premuim grade gasoline. I have 93 octane here....