Does race fuel actually works??? any one use it? so few post online of older cars saying that it does work... But im asking if it does anything to the 350z

 

With a re-map it works. The level of effectiveness depends on your engine mods and if your rev-limiter is intact, but even with no mods, a re-map with MS-109 will get you gains because it can rev higher without detonation.

 

The purpose of race gas is to prevent detonation. You will not see any gains in a stock compression, all motor Z from running race fuel.

 

Actually you see nice improvement with aggressive timing advance.

 

Quoted below from VP Racing:

You can't make a racing fuel that has the best of everything, but you can produce one that will give your particular engine the most power. This is why we produce different fuels for different applications. The key to getting the best racing gasoline is not necessarily buying the fuel with the highest octane, but getting one that is best suited for your engine.

1. OCTANE – This is simply the rating of a fuel’s ability to resist detonation and/or preignition. Octane is rated in Research Octane Numbers (RON), Motor Octane Numbers (MON), and Pump Octane Numbers. Pump Octane Numbers represent an average of RON and MON (R+M/2). VP uses MON because this test method is more relevant to racing. Most other companies use RON because it is higher, easier to obtain, and sounds better in marketing messages. Don't be fooled by high RON numbers or an average—MON is the most important for a racing application. However, the ability of the fuel to resist preignition is more than just a function of octane.

2. BURNING SPEED - The speed at which fuel releases its energy. In a high-speed internal combustion engine, there is very little time (real time—not crank rotation) for the fuel to release its energy. Peak cylinder pressure should occur around 20° ATDC. If the fuel is still burning after this, it is not contributing to peak cylinder pressure, which is what the rear wheels see.

3. ENERGY VALUE - An expression of the potential in the fuel. The energy value is measured in BTUs per pound, not per gallon. The difference is important. The air:fuel ratio is in weight, not volume. Remember, this is the potential energy value of the fuel. This difference will show up at any compression ratio or engine speed.

4. COOLING EFFECT: The cooling effect on fuel is related to the heat of vaporization. The higher the heat of vaporization, the better its effect on cooling the intake mixture. This is of some benefit in a four-stroke engine, but can be a big gain in two-stroke engines.

 

False. Oxygenated race fuels such as VP's MS109 have been proven to make power on completely stock applications.

The primary function of race fuel is to protect from detonation and allow for more aggressive timing, compression, and boost levels in modified engines but on a stock engine gains can be seen from using the right fuel.

 

Oxygenated race fuels are not legal for road use and are also banned from most racing circuits. So yeah they make some small power increases but you can't really (legally) use them anywhere.

 

I use it at the track (not any kind of sanctioned racing though) and have run it on the street (not often - just what’s left over from track)... plenty of places sell it without any disclaimer of "off-road use only"...

 

Not banned here!

 

I second this. I've tested some 100 octane fuel compared to 91 (cali), and the car picks up more. A nice addition for the weekends

 

Try going to a smaller airport which has a gas stand. I get mine from an airport, all I do is walk in with a gas container, use my ATM card, and walk out with 5 gallons of 100 octane fuel. The owners always see me, they never say anything to me

 

AV gas is formulated to burn at high altitude. It can be beneficial in some applications but you are better off buying VP or any other actual race gas. And remember some race gas still has lead in it. You dont want that in your Z.

 

VP MS109 is great stuff!

 

Aviation fuel and race fuel are not comparable. In a modified engine aviation fuel is more dangerous than pump gas. It has higher octane but does not have the proper additives for cylinder lubrication and burns very "dry" it also does not do a good job of cooling the chamber and has a tendency to cause an engine to run hotter and will burn pistons. Again, it's not too bad on a stock vehicle but on a modified engine it's trouble waiting to happen. Get a quality unleaded race fuel and go at it.

Before I came to Z1 I was a VP Fuel dealer for over 10 years working mostly with circle track and domestic drag racing applications but the same principles of fuel use apply to all forms of racing and all types of cars. Trust me if aviation fuel was suitable for use in automotive engines there wouldn't be as many race fuel companies and race fuel varieties as there are.

 

That is my understanding as well. We can get 100 low lead avgas here in Singapore at a private airport, same as any small airport in the US or the rest of the world, not recommended. The lead and lack of additiives will burn up a performance auto engine sooner than later.

 

The latent heat of evaporation released by AVGAS is one of the highest of any fuels. It does an excellent job of cooling the combustion chamber. There are 3 ways that a aviation recip engine cools itself. One is oil, Two is air. and three is fuel cooling. Pull the mixture control and lean out the cylinders and watch the cylinder head temps rise like crazy. What makes 100 Low Lead AVGAS bad for car engines is the insane amount of lead in it. They are both called gas, and that's where the similarity ends.

 

You forgot that your O2 sensors will also get destroyed.

I run 100LL in my race bike no prob, i cut it 50/50 with 92 for trackday use. Race weekend, over to the VP Vendor i went.

 

yeah, it works well at making your wallet lighter

 

My father-in-law, who had tons of $$, tried airplane fuel (107-octane) in a Volvo he used to own. The engine slowly started losing power, to the point of having to get rid of it (gave it away to a nephew for parts). Draw your own conclusions, dude.

 

I'll draw a conclusion from that: The car probably had a cat. Cat's + lead = clogged cat.


This thread is funny, you can tell who's using canned responses from race gas companies or suppliers. Lead is an excellent lubricant, and the part about avgas being designed to burn at high altitudes is complete ********, many planes fly at low altitudes, and then there is that stressful part of takeoff, planes don't take off from high altitudes.

Avgas is very very consistent, but I would never run it in a car with an o2 sensor. And like others have said, without at the least some timing to take advantage of racegas you'll see nothing but a loss, especially to your wallet. Before I got into cars I used to do some hardcore 2-stroke motor work, porting to time area target calc's, headwork from bmep calc's, even made my own expansion chamber once (fail), managed 58hp @ the wheels on a 250cc running 100LL, I was running 100ll or alky on everything back then.