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is 2.5 crank a straight swap for 2.0 crank

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Old 25 May 2007, 09:14 PM
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bigkid
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Default is 2.5 crank a straight swap for 2.0 crank

As the title says, i was wondering if it would fit into my closed deck block and the conrods from a 2.0 would fit ?
Old 25 May 2007, 09:25 PM
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Slowboy Racing
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You would need a different rod length or pistons or both depending on how you are doing it, and the block will need machining to except the crank as the thrust bearing location is different from phase1 to phase 2 once stroked you will end up with around 2.1lt.
Old 25 May 2007, 10:33 PM
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bigkid
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just viewed your scooby and that is an awesome car I was wondering how you reversed your phase1 inlet manifold???
Old 25 May 2007, 10:37 PM
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coulty
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a 2.1 like mine
Old 26 May 2007, 02:00 AM
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dazdavies
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I thought the rods were the same length for both 2.5 and 2.0L ie. 79mm.

I was thinking of doing this myself. I have a closed deck 2.0L block in the garage. Was thinking of using my Rods (eagle 79mm) wiseco pistons(93mm)
and a 2.5 crank to build a strong, high revving 2.1L engine.

Daz
Old 27 May 2007, 01:39 PM
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Yes they use the same length but if the 2.5 crank is 79mm and the 2.0 is 75mm and if you use the standard rods and piston from the 2lt im pretty sure they will be out the top of the block, so one or "both" has top be changed.

Bigkid. The manifold was left in original position just had the tb welded to the front side and the original intake sealed of.
Old 27 May 2007, 07:42 PM
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vulnax999
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Originally Posted by *Un-ink*
Yes they use the same length but if the 2.5 crank is 79mm and the 2.0 is 75mm and if you use the standard rods and piston from the 2lt im pretty sure they will be out the top of the block, so one or "both" has top be changed.
Do you mean the crank throw is different on 2.0 and 2.5l cranks?
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