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5 inch stroke
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HudCo View Drop Down
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Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3949 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Topic: 5 inch stroke
    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 ?
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DrAllis View Drop Down
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Joined: 12 Sep 2009
Points: 22149 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 11 Jul 2024 at 11:38pm
Zero !!! Those pistons will hit the head with a 4.5 inch stroke let alone 5 inch.
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Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3949 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jul 2024 at 7:48am
dont know what i was thinking 
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IBWD MIke View Drop Down
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Joined: 08 Apr 2012
Location: Newton Ia.
Points: 4135 		Post Options Post Options   Thanks (0) Thanks(0)   Quote IBWD MIke Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jul 2024 at 8:49am
My first thought was, what rods are you going to use?
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Joined: 12 Sep 2009
Points: 22149 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3949 		Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 12 Jul 2024 at 7:35pm
what about the ap48 what would that come up with
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Joined: 12 Sep 2009
Points: 22149 		Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post 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.
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