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Compression Ratio Question

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Old 06-07-2007 | 12:42 PM
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Lee_R21Turbo's Avatar
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Default Compression Ratio Question

Just about to purchase my new headgasket from France....I have 2 uprated thicker headgasket options.....

I was wondering if anyone can tell me the effect on compression the two options would have...

Standard figures to aid calculation if poss....

Bore / Stroke - 88 x 82
Compression Ratio - 8:1
Standard Headgasket Thickness - 1.75mm

My options are 1.9mm or 2.1.

Can anyone help please?

Old 06-07-2007 | 12:50 PM
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Hold on, i'll just work it out for you....

back in a sec.
Old 06-07-2007 | 12:52 PM
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Really......good man!!!
Old 06-07-2007 | 01:51 PM
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Right.....

The 1.9 mm gasket will drop the CR to 7.91:1

and the 2.1 will drop it to 7.797:1 (call it 7.8:1 )
Old 06-07-2007 | 02:00 PM
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Thats superb matey....much appreciated....buy yourself a pint for that!!!!

Reckon the 2.1mm sounds like a safer bet, more boost!!!
Old 06-07-2007 | 02:03 PM
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and i managed to managed to do all whilst on the phone to my wife who says our baby is on its way!
Old 06-07-2007 | 02:04 PM
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Congrats matey....in that case have more than one beer!!!!!!

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Old 06-07-2007 | 02:07 PM
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Originally Posted by Garage19
and i managed to managed to do all whilst on the phone to my wife who says our baby is on its way!
Congratulations Doug mate!



I take it you wont be at Woodbridge tomorrow then???
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