Race gas mixture!

[ivanstepul]

mixing 110 racing gas with vpower . It is harmful to the engine and if not what is the right ratio? I have mixed 3 gallons 93vpower gas with 1/9 gallon race gas.

[juicyjosh]

It's not harmful to the engine, and the best ratio is 0:1.

If your engine is stock, the ecu has been mapped by Toyota to run on regular American gas. Simply putting 110 octane into a stock Yaris engine doesn't turn it into a racing engine. Instead, compared to regular gasoline, the stock Yaris engine with "110 octane" in the tank will produce less power due to the fewer number of high energy molecules per volume injected into the engine, per the chemical composition of the fuel designated as "110 octane." Less power per volume of fuel means that more "110 octane" fuel is required by the engine to produce the same power and torque produced by a comparatively lesser volume of 87 gas, so fuel mileage is also reduced.

High(er) octane fuel is used to help prevent preignition and detonation in forced induction systems or in high compression N/A applications. A stock Yaris engine is neither of these.

[cali yaris]

^ what he said

[ivanstepul]

It's not harmful to the engine, and the best ratio is 0:1.

If your engine is stock, the ecu has been mapped by Toyota to run on regular American gas. Simply putting 110 octane into a stock Yaris engine doesn't turn it into a racing engine. Instead, compared to regular gasoline, the stock Yaris engine with "110 octane" in the tank will produce less power due to the fewer number of high energy molecules per volume injected into the engine, per the chemical composition of the fuel designated as "110 octane." Less power per volume of fuel means that more "110 octane" fuel is required by the engine to produce the same power and torque produced by a comparatively lesser volume of 87 gas, so fuel mileage is also reduced.

High(er) octane fuel is used to help prevent preignition and detonation in forced induction systems or in high compression N/A applications. A stock Yaris engine is neither of these.

Ok thanks. Idk it feel like it runs better? I have intake header exhaust

[09cptn]

Placebo effect maybe?

[Jason@SportsCar]

mixing 110 racing gas with vpower . It is harmful to the engine and if not what is the right ratio? I have mixed 3 gallons 93vpower gas with 1/9 gallon race gas.

Is that 110 leaded? If it is you will be shortening the life of your catalytic convert and risk fouling your plugs. There is no reason to run that on an n/a motor with stock compression. The car was built for 87, 91 is more than enough even for track conditions.

[fnkngrv]

^ +1

I had considered running C16 in my car this past Labor Day Weekend for the speed trials, but after careful research it was proven that even with a high flow cat setup like mine I could easily plug it up within a couple runs which in the long term would not have been worth it. THERE IS NO REASON IN A STOCK 1NZ OR OTHER TOYOTA MOTOR IN TODAY'S VEHICLES TO RUN OVER 87 WITHOUT FORCED INDUCTION.

[ivanstepul]

where did u turbo your cars? how much does it cost?

[willygoodness]

in Aus. the lowest octane we can buy is 91. using 98 i get around 90-110km more to a tank

[UberSilver]

Leaded race fuel will gum up your engine. My stock engine likes 91. If I use 87, it pings like crazy. With 91 it's smooth as silk with little to no pinging.

[xnamerxx]

Stock engine shouldn't be pinging with 87, also the motor has a knock sensor.

On my car with a piggyback and a custom header and exhaust I don't have any knock or detonation issues even after an hour on track. Anything over 91 is definitely a waste on a stock NA setup.

[Jason@SportsCar]

in Aus. the lowest octane we can buy is 91. using 98 i get around 90-110km more to a tank

The ratings are done differently around the world. Your 91 is going to be similar to our 87. In the US we typically see the (R+M)/2 spec listed, your number is based only the RON, which gives you a number 4-5 points higher for the same grade of fuel.

[willygoodness]

^^ ahh cool, good to know