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Home > Technical Chat > healthy engine compression figures

nogin

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westbury, wiltshire

2nd Dec, 2006 at 05:16:17pm

what is a healthy figure, am just curious 170psi or more

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fastcarl

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leeds/wakefield.

2nd Dec, 2006 at 06:44:18pm

depends what static CR you have and what can is used , but as important is the need for them to all be equal.

carl

Edited by fastcarl on 2nd Dec, 2006.

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nogin

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westbury, wiltshire

2nd Dec, 2006 at 07:35:36pm

so if my cr is 9:1 then my compression test should show 130 psi right

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turbo hogster

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stowmaket suffolk

3rd Dec, 2006 at 07:03:49am

all depends on the cam aswell

always looking for them bigger bunches of bannanas

nogin

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westbury, wiltshire

3rd Dec, 2006 at 10:52:54am

ph 2 of corse

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Vegard

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Norway

4th Dec, 2006 at 08:30:27am

It depends on how it's timed in as well :)

On 13th Jul, 2012 Ben H said:
Mine gets in the way a bit, but only when it is up. If it is down it does not cause a problem.

Nick
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Post Whore

Midlands

4th Dec, 2006 at 11:06:24am

if its any help when i'd just run my old engine in it was showing 120psi across all 4 cylinders. that was 8:1 cr with a ph2 cam timed at 108 degrees.

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Nic

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First mini turbo to get in the 12's & site perv

Herefordshire

4th Dec, 2006 at 11:50:19am

im pretty sure i was getting 150psi on mine, the main thing is that theyre all healthy and similar

your supposed to do it with the engine warm arent you too??
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