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What octane fuel ?

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Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=122248
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Topic: What octane fuel ?

Posted By: YT
Subject: What octane fuel ?
Date Posted: 21 Apr 2016 at 8:39pm

I know there are lots of variables, but what octane of fuel would one use if cranking pressure is around 200-210 psi?

Replies:

Posted By: DrAllis
Date Posted: 21 Apr 2016 at 10:06pm

100 to 104 should be good enough. Your total ignition timing (at full throttle)should be around maybe 20 degrees?? and set on a dyno to verify that is the best timing setting. Stock timing of 25 to 30 degrees BTDC is too fast with that much compression.

Posted By: YT
Date Posted: 22 Apr 2016 at 6:56am

Thanks Doc. Hopefully be on the dyno this weekend.