Compression Ratio For 87 Octane

This tends to be true for older, traditional engines with less effective combustion chambers. Here's what i'm getting at. Web it would help to know more about the camshaft. Many owners who operate vehicles designed to operate on 87 octane fuel experience ping and knock. At.300 below deck, the dome measures 22cc’s.

221 posts · joined 2007. I dont want to run premium fuel because it drinks it way to fast! Web use the standard compression ratio fuel octane chart to know the fuel suitable for your engine. Then follow our mixing charts provide our calculator app, above. Web compression ratio/87 octane gas.

10k views 7 replies 3 participants last post by sinister apr 21, 2009. Web just curious what the highest compression ratio would be to run 87? Is 9.3:1 static compression to much for 87 octane with vortec heads? If an engine is optimised for high octane fuel the designers can increase compression and add ignition advance, because the fuel is more resistant to autoignition. This tends to be true for older, traditional engines with less effective combustion chambers.

What octane is needed for dynamic compression? Web the generally accepted conservative estimate is 8.0 to perhaps 8.5:1 dynamic compression ratio for 91 octane pump gas. Hello, in your professional opinion at what point in the compression range is 87 octane gasoline no longer useful due to detonation? Many owners who operate vehicles designed to operate on 87 octane fuel experience ping and knock. The 291 is a hemispherical head if i recall, so you should be ok with 87 octane, but you're probably right on the edge.

Web compression ratio/87 octane gas. Im not sure how well these would work with gt 40 heads. Somewhere between 9.0:1 and 9.5:1 would work. What is the best compression ratio?

221 Posts · Joined 2007.

10k views 7 replies 3 participants last post by sinister apr 21, 2009. I dont wanna risk having to run premium as this will be in a truck that will m. Web the most common type of octane rating worldwide is the research octane number (ron). Im just trying to figure out what cr i should go with.

A General Rule Of Thumb Is That 160Psi Is The Absolute Max That Can Be Run With Iron Heads And High Test Pump Gas And That Is With Some Well Thought Out Parts,.

Web #1 · jul 19, 2011. Why do some manufacturers require or recommend the use of higher octane gasoline? My desoto 291 has a stock cr of 7.5:1. Web compression ratio and octane ratings faq at what compression ratio do you need premium fuel?

Hello, In Your Professional Opinion At What Point In The Compression Range Is 87 Octane Gasoline No Longer Useful Due To Detonation?

At.300 below deck, the dome measures 22cc’s. The cam i installed is comp cam 280h. #2 · feb 18, 2009. How much octane do i need?

Here's What I'm Getting At.

But for later model engines with better chambers, that could be improved to 9.0:1 dynamic. If an engine is optimised for high octane fuel the designers can increase compression and add ignition advance, because the fuel is more resistant to autoignition. Web it would help to know more about the camshaft. Higher octane fuels are often required or recommended for engines that use a higher compression ratio and/or use supercharging or turbocharging to force.

Web compression ratio and octane ratings faq at what compression ratio do you need premium fuel? I dont wanna risk having to run premium as this will be in a truck that will m. Your compression ratio won't change, but your compression pressure will. Then follow our mixing charts provide our calculator app, above. Many owners who operate vehicles designed to operate on 87 octane fuel experience ping and knock.