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octane

hdbob5454
in General Pontiac Discussion

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stock 70 350 wondering if its safe to run 87 in it, I know back in 70 regular was higher ,thought I ask before trying it 

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    350 V8 compression ratios ran from 9:1 to 10.25:1 originally.  Assuming your motor is stock or very lightly modified, you should be okay with 87. If you are worried, you can buy a bottle of 104+ Octane Boost and pour it in at the first sound of pinging. 
     

    My 455 was rebuilt and blueprinted so I run 93-94 justa to be safe. Pre-rebuild I ran premium and octane boost. So I am saving on octane boost.

    • Like 2
    • 4 weeks later...
    • Author

    just ran out the 93 and put in 87 seems good no ping that I could hear

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