Quick Check Engine Compression ratios - Honda-Tech - Honda Forum Discussion

Honda Civic / Del Sol (1992 - 2000) EG/EH/EJ/EK/EM1 Discussion

Quick Check Engine Compression ratios

Reply

 
 
 
Old 11-19-2003, 03:26 AM
  #1  
Honda-Tech Member
Thread Starter
 
ace1875's Avatar
 
Join Date: Nov 2002
Posts: 1,049
Default Quick Check Engine Compression ratios

The Calculation of an engine's compression ratio ( C.R. ) is based on the formula :

CR= (SV+CV)/CV

SV= Swept Volume for one cylinder in CC's= Bore x Bore x stroke x 12.9

CV= Clearence Volume for one cylinder in CC's= HV minus EDV plus DV plus GV

HV= Head Volume (measured in CC's)= Best if measured because head volume vaires

EDV= Effective Dome Volume (measured in CC's)= Dome volume minus valve relief and/or dish volume

DV= Deck Volume clearance (piston to deck) (measured in CC's) = Bore x Bore x Deck Height x 12.9

GV= Gasket Volume (measured in CC's)= Gasket Bore x Gasket Bore x Compression Thickness x (12.9 or enter known gasket volume)


edit: Cubic Inch Displacement measurement

Bore x Bore x stroke x .7854 x 4(cylinders)

Thought this should be in H-T to be archived if someone needs these formulas. If anyone have anymore usefull formulas please feel free to post them.

Thanx
Ace
ace1875 is offline  
Reply With Quote
 
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
flyrod
Honda Prelude
16
10-29-2010 06:55 AM
ludesleep
Classifieds: Forced Induction
6
12-03-2009 12:22 PM
3.504
Tech / Misc
1
06-22-2005 11:17 PM
Blaise
All Motor / Naturally Aspirated
2
10-17-2004 05:54 AM
vtecvoodoo
Acura Integra Type-R
6
06-27-2002 07:59 PM


Thread Tools
Search this Thread
Quick Reply: Quick Check Engine Compression ratios


Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: