Pulling Forum - 5 inch stroke

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5 inch stroke

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=202230
Printed Date: 18 Oct 2024 at 3:33am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: 5 inch stroke

Posted By: HudCo
Subject: 5 inch stroke
Date Posted: 11 Jul 2024 at 9:57pm

if i take these ap46 pistons without milling them and add it to a 5 inch stroke crank in the d 17 engine what would that end up to be compression wise ?

Replies:

Posted By: DrAllis
Date Posted: 11 Jul 2024 at 11:38pm

Zero !!! Those pistons will hit the head with a 4.5 inch stroke let alone 5 inch.

Posted By: HudCo
Date Posted: 12 Jul 2024 at 7:48am

dont know what i was thinking

Posted By: IBWD MIke
Date Posted: 12 Jul 2024 at 8:49am

My first thought was, what rods are you going to use?

Posted By: DrAllis
Date Posted: 12 Jul 2024 at 8:55am

If you had an SP-48/AP-48 piston, the 5 inch stroke thing would work, as they were made for the 4.500" stroke crank where the SP-46/AP-46 piston was made for a 4.00" stroke crank.

Posted By: HudCo
Date Posted: 12 Jul 2024 at 7:35pm

what about the ap48 what would that come up with

Posted By: DrAllis
Date Posted: 12 Jul 2024 at 7:41pm

Pretty sure AP-48 with a 5 inch stroke will also need to have .170" skimmed off the top to avoid the piston smacking the cylinder head. I'M ASSUMING THIS!!! I DON"T HAVE AN AP-48 PISTON TO MEASURE !!! It should have even more compression than the AP-46 with a 4.500" crankshaft.