7.3 indentification
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Junior User
Joined: May 2009
Posts: 86
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From: Smithfield Ky.
7.3 identification
I was told that in '01 that ford was switching between lower annd higher copression engines. The 1550 was a little lower and I was just wandering what I had.
Posting Guru
Joined: Aug 2007
Posts: 1,714
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From: Canton, IL
Ok, Well, I haven't heard that for '01's, what is different for 01 is Powdered Metal Connecting Rods. 2000 and earlier 7.3's had Forged Connecting rods, and are thought to be stronger.
Now, as far as compression, 1994 and earlier 7.3L IDI diesels were 20.5 - 21:1 compression. Where as 1994.5 and up PSD 7.3 DI turbo diesel are around 17.5:1 compression.
Now, as far as compression, 1994 and earlier 7.3L IDI diesels were 20.5 - 21:1 compression. Where as 1994.5 and up PSD 7.3 DI turbo diesel are around 17.5:1 compression.
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Elder User
Joined: Dec 2009
Posts: 592
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oh ok! So is there away to ID 1550 & 1555 engine????? I have an 2001.
Powdered Metal sounds weaker, ha ha ha
Powdered Metal sounds weaker, ha ha ha
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Joined: Jul 2003
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From: Newport, WA
Powdered Metal Rods (PMR's) are weaker than the forged rods they replaced. The easiest way to tell what you have is to pull the inspection plug and look... the info is in the 99-03 7.3L forum.
Posting Guru
Joined: Aug 2007
Posts: 1,317
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From: Auburn, Wa
I looked awhile back to find out if the compression ratios changed between years but everything I found said they all had the same compression ratio from 99-2003. Didnt check the OBS trucks years.
