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10-21-2009, 09:34 AM
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#2 |
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Senior Member
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That's not how you measure compression ratio.
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1988 Honda Civic Standard-more mods than I want to list 1992 Honda Accord LX 1996 Toyota Avalon-Spun bearing, for sale. Terrorists have successfully attacked our imagination. RIP Jon Eban Nie, August 31, 1991 - May 7, 2006 Y-Daniel Siu Eban, September 7, 1986 - May 7, 2006 |
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10-21-2009, 02:27 PM
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#4 |
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Err ___ GTFO
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volume at TDC vs Volume at BDC
Cyl Volume + Deck Clearance Volume + Head Gasket + Combustion Chamber Volume Divided By Deck Clearance + Head Gasket + Combustion Chamber Volume __________________
 (((Family Guy FTW)))
Last edited by Slow&Delirious; 10-21-2009 at 02:30 PM. |
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10-21-2009, 02:35 PM
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#5 |
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Err ___ GTFO
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OR
Bore x Bore x Stroke x .7854 = Cylinder Volume = V1 Bore x Bore x Deck Clearance x .7854 =Clearance Volume = V2 Bore x Bore x Head Gasket Thickness x .7854 = Gasket Volume = V3 Combustion Chamber CC's x .061 = Combustion Chamber CI = V4 V1 + V2 + V3 + V4 --------------------- V2 + V3 + V4 But 210 psi sounds like a good reading for a honda engine, mine is like 140 psi and it runs allight __________________
(((Family Guy FTW)))
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10-21-2009, 03:39 PM
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#6 |
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I still know everything
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shouldn't that equation include piston dome/dish
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Formerly the.original.kermit Back from the dead... twice I NEED PARTS!!! http://hondaswap.com/parts-sale-trade-wanted/wtb-1989-crx-parts-161172/#post1079066 Check out my progress... http://hondaswap.com/auto-multi-media/my-1989-crx-project-144941/ |
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10-21-2009, 03:43 PM
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#7 | |
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dome/dish is part of combustion chamber cc's
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Quote:
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10-21-2009, 03:46 PM
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#8 |
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I still know everything
Join Date: Aug 2008
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Ride: 89 CRX HF, 96 Accord EX, 88 Dodge Daytona Shelbyz T-tops
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The calculation for determiningcompression ratio works out likethis:
CR=(D + PV + DC + G + CC) / (PV + DC + G + CC) CR = Compression Ratio D = Displacement PV = Piston Volume DC = Deck Clearance Volume G = Gasket Volume CC = Combustion Chamber Volume __________________
Formerly the.original.kermit Back from the dead... twice I NEED PARTS!!! http://hondaswap.com/parts-sale-trade-wanted/wtb-1989-crx-parts-161172/#post1079066 Check out my progress... http://hondaswap.com/auto-multi-media/my-1989-crx-project-144941/ |
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10-21-2009, 07:09 PM
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#9 |
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Assuming your engine is otherwise stock your C/R should be about 11.3:1. 210 psi on a compression test is fairly decent. have you checked all 4 cylinders to see how close they are?
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What I write is my own opinion based on what I have done. Your own results may vary... "Understeer is when you hit the wall with the front of the car and oversteer is when you hit the wall with the rear of the car. Horsepower is how fast you hit the wall, torque is how far you take the wall with you." --Anonymous |
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