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Compression
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Stoges View Drop Down
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Joined: 27 Apr 2024
Location: Erie Pa.
Points: 15 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Stoges Quote  Post ReplyReply Direct Link To This Post Topic: Compression
    Posted: 16 Apr 2025 at 6:36pm
Some where I saw someone running 240psi compression in a WD45, isn’t that a bit too much.
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 21433 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 16 Apr 2025 at 7:56pm
My D-17 puller had 300 psi. It required 114 octane fuel.  240 psi works well with 110 octane.
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ekjdm14 View Drop Down
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Joined: 20 Aug 2024
Location: Manchester UK
Points: 799 		Post Options Post Options   Thanks (0) Thanks(0)   Quote ekjdm14 Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 2025 at 1:02pm
300psi wow, surprised we're talking octane and not cetane at those numbers LOL

Sure it'd run somewhat OK on diesel with 300psi, must be a real ripper on gas when she gets on song!
Stuck Farmer
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Ed (Ont) View Drop Down
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Joined: 08 Nov 2009
Location: New Lowell, Ont
Points: 1429 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ed (Ont) Quote  Post ReplyReply Direct Link To This Post Posted: 18 hours 49 minutes ago at 8:12pm
Wow for sure! How did you get them to turn over when starting? 
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Joined: 12 Sep 2009
Points: 21433 		Post Options Post Options   Thanks (1) Thanks(1)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 3 hours 20 minutes ago at 11:41am
My local alternator/generator/starter shop (which there are very few left these days) installed some stronger field windings on my D-17 engine, which was already 12 volts. I used an 880 CCA battery and welding cable for my battery cables. My WD was just a stock 6V Delco starter with a center bearing in it, and again an 880 CCA batt and welding cables.
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Ed (Ont) View Drop Down
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Joined: 08 Nov 2009
Location: New Lowell, Ont
Points: 1429 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Ed (Ont) Quote  Post ReplyReply Direct Link To This Post Posted: 2 hours 60 minutes ago at 12:01pm
Thank you. Very interesting thread. I did not know you could get that much compression in a gasser. 😀😀
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