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cossie 205 block with 4x4 head..?

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Old 05-07-2004, 11:42 AM
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manoj
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Default cossie 205 block with 4x4 head..?

Peeps,
what are the advantages or disadvantages of using a 2wd bottom end (205 Block) with a 4x4 cylinder head..?
does this require any machining work on the pistons.. or should both fit together without any problems..?

situation.. I've got a 2wd engine with bent valves only (block and pistons are good) and I've got a spare 4x4 head in good condition, new tappets etc.

Old 05-07-2004, 11:44 AM
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Spiky
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if you use a 205 block with 2wd pistons with a 4wd head, you will high the C/R to around 8:3.1

NOT good

though it's good to have a 205/200 block with 4wd pistons and get a 7:8.1 C/R

Old 05-07-2004, 11:46 AM
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Jim Galbally
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i thought cossies were 8.2:1 standard anyway?

what kinda power output u after?
Old 05-07-2004, 11:47 AM
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8:1.1 standard
Old 05-07-2004, 11:49 AM
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manoj
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just a stage 1 chip for now, maybe greens and 3bar, chip later.

spiky, 7:8.1 C/R is that 4x4 pistions in 205 block with 4x4 head..?

Old 05-07-2004, 12:06 PM
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the block has nothing to do with it dude

it's what pistons you use
Old 05-07-2004, 05:54 PM
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well got a nice new 200 block with 4wd pistons

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Old 05-07-2004, 08:49 PM
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Std 2wd block,std 2wd pistons,4x4 head cos i utterly destroyed my original one. No problems(engine builder didn't seem to think so either).
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