What is the compression ratio for 93 octane?

We are being told by most piston manufacturers that 9.5:1 is the most you should run in an engine with cast iron heads on 93 octane pump gas. Because aluminum conducts (dissipates to the cooling system) heat much faster than cast iron does, you can run 10.5:1 with aluminum heads on 93 octane.

What octane is needed for 11 1 compression?

95 Octane. Gasoline with this octane number is known in Indonesia under the brands Pertamax Plus (produced by Pertamina), Super Extra (produced by Shell), and Primax (produced by Petronas). This type of gasoline is advisable for car engines with compression ratios of 11:1 to 12:1.

Can I run pump gas on 12 to 1 compression?

You can run 11:1 or even 12:1 compression on your pump-gas street motor, but you’ll need this simple advie to make it happen. Obviously the principal idea of the compression stroke is to compress the intake charge as effectively as possible, and to do so with minimal leakage.

At what compression ratio should I use premium gas?

9.3 : 1
To release all the potential power of 91 octane gasoline, it is necessary for an engine to have a compression ratio higher than 9.3 : 1.

What octane do you use for 15 1 compression?

VP Racing Fuel C25 113 Motor Octane Up to 15:1 Compression 5 Gallon Pail Leaded.

What is a good dynamic compression ratio?

As a general rule, the best available pump gas will work with an 8.0:1 dynamic compression ratio. To get 8.0:1 with the preceding rod, stroke, and cam intake closing event, you would need about a 13.2:1 static ratio.” Erb’s 8.0:1 dynamic guideline is for classic, old-school, all-iron engines.

What gas do you use for 13 1 compression?

Light weight helps you get to your design goals, but the most interesting part about the Skyactiv engine is its ability to run a sky high 13:1 compression ratio on inexpensive 87 octane unleaded fuel. (Skyactiv engines in other countries run 14:1 compression ratio but must run 91 or higher octane fuel).

What octane do you use for 10 1 compression?

Most stock gas engines have a compression ratio around 10:1 and run just fine on regular 87-octane gas.

What is a safe compression ratio for 91 octane?

The generally accepted conservative estimate is 8.0 to perhaps 8.5:1 dynamic compression ratio for 91 octane pump gas. This tends to be true for older, traditional engines with less effective combustion chambers. But for later model engines with better chambers, that could be improved to 9.0:1 dynamic.

What is the highest compression ratio for pump gas?

The standard recommendation for street engines running on pump gas has always been to shoot for a 9.0:1 to perhaps 9.5:1 compression ratio. This is in order for the engine to safely work with pump gas, which for much of the country, is limited to 91-octane.

What is the octane of VP C12?

Fuel Brand	Motor Octane	Octane Differential
VP C11	104	4.0
VP C12	108	2.0
VP C14	114	2.0
VP C14+	115	2.0