V6 Discussion and questions about the base carbureted or MPFI V6's and the rare SFI Turbo V6.

new engine time

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Old Jun 13, 2006 | 08:55 PM
  #1  
daves12secV6's Avatar
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From: Sayreville NJ
new engine time

well the 2.8 in the rs is ****ed actually all it needs is a new crankshaft,but instead of getting a new crank,im getting a fresh 3.1 (20,000 miles) this weekend that im going to replace the 2.8 with.now i just gota order up a set of custom forged pistions for the 3.1 like i did for the 2.8
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Old Jun 13, 2006 | 09:48 PM
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redbird8628's Avatar
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From: Highlands, NJ
Car: 1986 Firebird
Engine: 3.4 outa 95' bird
Transmission: T5
Axle/Gears: 3.42 open rear
isnt the 3.1 the same bore as the mighty 2.8? why not swap the pistons out of the 2.8 into the 3.1? or better yet, wait on the 3.1 and find yourself the 3.4...ross makes a set of forged pistons for that bore
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Old Jun 13, 2006 | 10:04 PM
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daves12secV6's Avatar
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yeah but,the stroke is longer so the pistions are diff the 2.8 pistions will give to high a compression ratio, and thats if they dont pop out the top of the bore
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Old Jun 13, 2006 | 10:08 PM
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69charger383's Avatar
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From: Connecticut
Car: 2005 Lincoln LS, 83' Z28
Engine: 242 DOHC and an empty engine bay.
Transmission: 5R55S, T5 soon to be auto
Axle/Gears: 3.58s and soon to be 4.10s
Well from what Ive learned, the 3.1 crank and 2.8 pistons will make it so the pistons pop out of the block.. My .040 over pistons might be forged, Ill go look into it right now, and if they are Ill let you know where I got them from..
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Old Jun 13, 2006 | 10:11 PM
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daves12secV6's Avatar
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thnx but, im going with one off j.e. pistions again,unless i can find some off the shelf brand name stuff for the 3.1
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Old Jun 13, 2006 | 10:34 PM
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69charger383's Avatar
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From: Connecticut
Car: 2005 Lincoln LS, 83' Z28
Engine: 242 DOHC and an empty engine bay.
Transmission: 5R55S, T5 soon to be auto
Axle/Gears: 3.58s and soon to be 4.10s
TRW makes forged pistons for the 2.8 as well..
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