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CATEGORY LISTINGS > DETROIT > 12.7L to 14L conversion [ REFRESH ]
Thread Title:

12.7L to 14L conversion


Created On Tuesday October 06, 2015 23:22 Diesel Talk
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benjamin2606
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Posts: 49
Joined: Apr 2014

Note Tuesday October 06, 2015 23:22 View thread in raw text format
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Has anyone ever, or does anyone know if it's possible to take a 12.7 and rebuild it as a pre egr 14L? I have a both and the 12.7 is getting a rebuild soon and i'd much rather have two 14L engines. Is it simply a matter of ordering the pistons, liners, crank etc for my 14L and using them in the 12.7 or are the blocks too different?

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 2000 Western Star 4964 14L 550 S60
2003 Western Star 4900EX 12.7 500 S60
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grampa
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Note Friday October 09, 2015 18:30 View thread in raw text format
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blocks are different
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benjamin2606
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Joined: Apr 2014

Note Sunday October 11, 2015 22:44 View thread in raw text format
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Is it just that the outside diameter of the liners it bigger on the 14L and won't fit? I was at one of the truck racing events in Quebec, Canada this summer and one of the racers told me he had a 12.7L with a 14L crank giving him approximately 13.4L of displacement. I asked him why he didn't do a full 14L conversion and he just said he like the compression ratio he had but didn't say whether or not it was possible. This is what got me wondering if I could do it

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 2000 Western Star 4964 14L 550 S60
2003 Western Star 4900EX 12.7 500 S60
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westcoast
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Joined: Dec 2008

Note Wednesday October 28, 2015 06:33 View users profile View thread in raw text format
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Different but can be done - lightweight crank with rods Regard David

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