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yb 4x4 pistons with 2wd head what comp ratio ?

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Old 27-03-2009, 10:11 PM
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Default yb 4x4 pistons with 2wd head what comp ratio ?

as above ?
Old 27-03-2009, 11:08 PM
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7.8:1
Old 27-03-2009, 11:18 PM
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Is that what you get then if you use a 200 block with 4x4 pistons and bolt the 2wd head on ?
Old 27-03-2009, 11:21 PM
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Originally Posted by rax2wdrax
Is that what you get then if you use a 200 block with 4x4 pistons and bolt the 2wd head on ?

Yes..... blocks are all identical in dimensions wether they are 205/202/200 etc, it`s the piston bowls that are different and the combustion chambers in the head
Old 27-03-2009, 11:22 PM
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Ah cool,thanks
Old 27-03-2009, 11:45 PM
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I was always under the impression it was a .3 difference??
Old 28-03-2009, 12:56 AM
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Originally Posted by TiB
I was always under the impression it was a .3 difference??
I think it works out to 7.78:1 exactly Lee..... most people just say 7.8

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Old 28-03-2009, 01:56 PM
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Cool.. nice one
Old 28-03-2009, 03:05 PM
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cheers fellas my mates putting a yb in a mk1 escort and i wanted to let him know c/r for the chip. engine is totally standard so msd off the shelf should be good enough for 25 psi t34.48 shouldnt it ?
Old 17-04-2009, 01:49 PM
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Does a 2WD head fit a 200 (4x4) block than?

Cheers,



Mark
Old 17-04-2009, 02:06 PM
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yes mate

Old 17-04-2009, 06:00 PM
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Originally Posted by The Diva
7.8:1
so what about if you used 2wd piston with 4wd head ,what would it be
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