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Old 12-18-2020, 04:27 PM   #41 (permalink)
Isaac Zachary
High Altitude Hybrid
 
Join Date: Dec 2020
Location: Gunnison, CO
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Avalon - '13 Toyota Avalon HV
90 day: 40.45 mpg (US)

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Quote:
Originally Posted by ps2fixer View Post
For propane, I've read a little on them, and the ideal compression ratio is somewhere around 13:1 and is about 104 octane... This all makes me want to get a cheap (and old) VW diesel to experiment with.
My old 1985 VW diesel had a CR of 23:1 IIRC. Probably not very propane-only friendly. Modern diesels have a far lower CR. But they also have a turbo charger. Of course the danger of having the turbo spool up and cause the propane to detonate can be negated by installing a pressure valve as has already been stated.

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