9:1 compression. Will it run on pump gas

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May 3, 2000 | 09:10 AM

bigmanm

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Trailblazer

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I have a 9:1 compression wiseco piston. Can i run it on standard 87 octane pump gas without detination.

May 3, 2000 | 11:55 AM

boomer

Range Rover

Joined: Jul 1999

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What do you ride? Anyways, that shouldnt be a problem. Mine was stock with 9.25:1 and it ran fine..no knocks. I now run 10.25:1 and run premium with no knocking. Havent tried the regular with it though.

May 3, 2000 | 12:41 PM

Tree Farmer

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Joined: Jul 1999

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Might, depending upon spark advance, load, valve timing, rpm, etc.

My suggestion; chance it! If pinging occurs, move up a grade or two.

Tree Farmer

May 3, 2000 | 01:43 PM

ScoobyDFW

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The DS650 has a 9.7:1 compression ratio and Bombardier recommends 91 octane pump gas. Gas prices should fall, so why not run 91-94 octane?

May 3, 2000 | 11:25 PM

Adam Zuroski

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The Kawasaki Mojave has an 11:1 compression ratio stock, I'm not sure what they recommend, but You should be fine.

May 4, 2000 | 05:40 PM

Mike Frey

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I prefer at least 92 in my 400EX. Sometimes, 92 or 93 isn't available, so I get 91, but one octance point shouldn't make a difference.

May 4, 2000 | 06:25 PM

JRM

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MY 91' XR 250 with stock 10.5:1 runs great off 85 octane pump fuel.. just depends on the engine

Use 92 and your fine

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