Compression
Printed From: Unofficial Allis
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=206331
Printed Date: 08 Jun 2025 at 10:23am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Compression
Posted By: Stoges
Subject: Compression
Date 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. |
Replies:
Posted By: DrAllis
Date 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. |
Posted By: ekjdm14
Date Posted: 18 Apr 2025 at 1:02pm
300psi wow, surprised we're talking octane and not cetane at those numbers  Sure it'd run somewhat OK on diesel with 300psi, must be a real ripper on gas when she gets on song! ------------- Stuck Farmer |
Posted By: Ed (Ont)
Date Posted: 13 May 2025 at 8:12pm
| Wow for sure! How did you get them to turn over when starting? |
Posted By: DrAllis
Date Posted: 14 May 2025 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. |
Posted By: Ed (Ont)
Date Posted: 14 May 2025 at 12:01pm
| Thank you. Very interesting thread. I did not know you could get that much compression in a gasser. 😀😀 |