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What is the correct octane rating for 9.8 to 1 compression ratio?
Wiki User
∙ 11y ago
It really depends on the motor, heads(iron/aluminum), cam. For example an older iron head 350 with a small cam with 9.8:1CR will need 93 maybe even octane booster. While a small bore aluminum head engine could run 89 maybe even 87 depending on cam size.
Wiki User
∙ 11y ago
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What is the correct octane rating for 10.5 to 1 compression ratio?
For a compression ratio of 10.5:1, the recommended octane rating is typically around 91-93 octane. Higher compression ratios require higher octane fuel to prevent knocking or pre-ignition in the engine. It is important to use the correct octane rating to ensure optimal performance and to avoid engine damage.
If you run a Honda 50cc dirt bike on 110 octane gas what will happen?
Congratulations you have just added to the Misinformation Superhighway. Stock specs for Hondas is about 10:1 COMPRESSION The octane rating of gasoline tells you how much the fuel can be compressed before it spontaneously ignites. When gas ignites by compression rather than because of the spark from the spark plug, it causes knocking in the engine. Knocking can damage an engine, so it is not something you want to have happening. Lower-octane gas (like "regular" 87-octane gasoline) can handle the least amount of compression before igniting. The compression ratio of your engine determines the octane rating of the gas you must use in the car. One way to increase the horsepower of an engine of a given displacement is to increase its compression ratio. So a "high-performance engine" has a higher compression ratio and requires higher-octane fuel. The advantage of a high compression ratio is that it gives your engine a higher horsepower rating for a given engine weight -- that is what makes the engine "high performance." The disadvantage is that the gasoline for your engine costs more
What octane gasoline must be used in an engine with 10.5 compression ratio?
91 +
1958 Cadillac what octane of gas?
Cadillac 1958 with the compression ratio of 10.25:1 should not run on gas below 98 octane.
Can the Oldsmobile aurora run on regular gas?
It can ..but the compression ratio require 91 octane minimum...
Is it possible to determine an octane rating from a vapour?
The octane rating of a substance is a measure of its resistance to autocombustion when compressed. By definition, isooctane has an octane rating of 100, and n-heptane a rating of 0, and all others are in comparison to these two.There are various ways to measure the octane rating of a substance. On way is determined by running the fuel through a specific test engine with a variable compression ratio under controlled conditions, and comparing these results with those for mixtures of isooctane and n-heptane.For other more information, and for the source of this information, see the Wikipedia link under the Web Links to the left of this answer.
What is the spontaneous combustion of the charge commonly caused by low octane fuel or excessive compression ratio?
Autoignition
What fuel octane does a 1975 El Camino use?
By '75 they had reduced the compression ratio significantly, so you can use the cheap stuff. 85 octane is high enough.
What is the octane level for a 1991 Chevy Caprice?
305 Small Block Chevy engines typically were 8.6 compression ratio and would use 87 octane fuel.
Does 1993 dodge stealth es need premium gas?
I'm going to say yes it is best. minimum octane I would consider using in these cars is 87 octane with a compression ratio of 10:1, turbo models 92 octane minimum rating. Reason... octane is a fuel stabilizer and allows for higher compression without pre-ignition. If the octane to low the air/fuel mixture can ignite from compression alone ( no spark required) not to mention a nice little piece of hot carbon that has built up can ignite the fuel. Pre-ignition can cause severe damage to your engine. Always error on the side of caution.
Does compression ratio effect octane requirements?
Yes, the higher the compression ratio, the more octane the fuel has to be. Anything over 10.0:1 has to be 91 or higher. However, if performance is not an issue, than you can use any type of fuel you want, but car will not accelerate fast and its torque curve will be very bad. Using low octane fuel in a high compression engine will also cause knocking (pinging, pinking). This will cause damage if continued.
What octane gas for a 2007 Pontiac Grand Prix gxp?
GXPs come with the LS4 motor so with the compression ratio it's not recommended to go below 91 octane.
