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Another compression question

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Old Jun 3, 2008 | 12:47 AM
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Default Another compression question
Ok, lq9 with 241 heads (67cc chamber I believe they are) and stock head gaskets, what comp would I be looking at?
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Old Jun 3, 2008 | 12:56 AM
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Head Volume in CC:

Piston Top Volume in CC:

Cylinder Bore in Inches:

Crankshaft Stroke in Inches:

Deck height in Inches:

Gasket Height in Inches:

I need to know the following

Dustin
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Old Jun 3, 2008 | 01:16 AM
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Head Volume in CC: 67

Piston Top Volume in CC: 0

Cylinder Bore in Inches: 4.00

Crankshaft Stroke in Inches: 3.622

Deck height in Inches: ?? I think 9.25" but I'm not sure

Gasket Height in Inches: .054
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Old Jun 3, 2008 | 01:24 AM
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Deck height is from the top of the piston to the deck with piston at TDC

Dustin
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Old Jun 3, 2008 | 01:26 AM
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Originally Posted by thunder550
Head Volume in CC: 67

Piston Top Volume in CC: 0

Cylinder Bore in Inches: 4.00

Crankshaft Stroke in Inches: 3.622

Deck height in Inches: ?? I think 9.25" but I'm not sure

Gasket Height in Inches: .054
with a .030 deck height your looking at 9.8 to 1

with a .020 deck height your looking at 10.1 to 1

with a .040 deck height your looking at 9.6 to 1

Dustin
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Old Jun 3, 2008 | 01:28 AM
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Originally Posted by 2005 Silverado
Deck height is from the top of the piston to the deck with piston at TDC

Dustin

Deck height is actually the distance from the centerline of the crank to the top of the deck. You're looking for distance in/out of the hole.
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Old Jun 3, 2008 | 01:29 AM
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ok i will use your numbers

Dustin
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Old Jun 3, 2008 | 01:30 AM
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1.4 to 1

http://www.bgsoflex.com/cr.html

here is the site i am using, i am just saying i know deck height FOR COMPRESSION RATIOS as the measurement from the piston at TDC to the Deck, your giving complete deck height.

Dustin
Last edited by 2005 Silverado; Jun 3, 2008 at 01:32 AM. Reason: added stuff
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Old Jun 3, 2008 | 01:33 AM
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I'm not saying my numbers are right, I'm saying your definition is wrong.
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Old Jun 3, 2008 | 01:36 AM
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Originally Posted by 2005 Silverado
1.4 to 1

Dustin
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