Buy, Sell, & Trade - Archive Get a sweet deal from another member on those parts you've been wanting, or be the member thats selling them!

understanding compression ratio

 
Thread Tools
 
Old Oct 1, 2010
  #1  
brandonparsons's Avatar
Thread Starter
Registered!!
 
Joined: Jun 2010
Posts: 23
Likes: 0
From: Albuquerque NM
Rep Power: 0
brandonparsons is an unknown quantity at this point
understanding compression ratio

When talking about compression ratio, For example 11:1. 11 means total volume at TDC, and 1 means total volume a BDC right?
Old Oct 1, 2010
  #2  
Mad Dog Tannen's Avatar
Registered!!
 
Joined: Jul 2010
Posts: 1,472
Likes: 3
From: Paradise Ca
Rep Power: 209
Mad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to all
Re: understanding compression ratio

Well yes, but that is multiplied by atmospheric pressure. Which I believe is somewhere around 14lbs at sea level if I remember correctly. And that is TDC on the compression stroke. I am not sure if that is what you are asking, but I hope that helps. What are you trying to figure out?
Old Oct 1, 2010
  #3  
xRiCeBoYx's Avatar
Administrator
Hey! Look At Me!! I'm a Supporting Member!!
Administrator
iTrader: (22)
 
Joined: Aug 2003
Posts: 21,620
Likes: 1,252
From: Las Vegas, NV
Rep Power: 513
xRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond repute
Re: understanding compression ratio

wait.. I think you have it backwards. Unless I'm mistaken.

1 unit at TDC, 11 at BDC. At BDC, maximum air in the cylinder, and in the case of 11.0:1, 11 times the volume of air in the cylinder than at TDC.

and for semantics, 14.7psi atmospheric at sea level..

edit: re-worded for more "correctness" (volume vs amount)
Old Oct 2, 2010
  #4  
Mad Dog Tannen's Avatar
Registered!!
 
Joined: Jul 2010
Posts: 1,472
Likes: 3
From: Paradise Ca
Rep Power: 209
Mad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to all
Re: understanding compression ratio

^ You are right. I misunderstood the question at first glance.
Old Oct 2, 2010
  #5  
xRiCeBoYx's Avatar
Administrator
Hey! Look At Me!! I'm a Supporting Member!!
Administrator
iTrader: (22)
 
Joined: Aug 2003
Posts: 21,620
Likes: 1,252
From: Las Vegas, NV
Rep Power: 513
xRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond repute
Re: understanding compression ratio

I did, too, until I started to type in my concurrence with you. That's when it just didn't sit right with me.
Old Oct 2, 2010
  #6  
Mad Dog Tannen's Avatar
Registered!!
 
Joined: Jul 2010
Posts: 1,472
Likes: 3
From: Paradise Ca
Rep Power: 209
Mad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to allMad Dog Tannen is a name known to all
Re: understanding compression ratio

Lol...I hate word problems
Old Oct 3, 2010
  #7  
xRiCeBoYx's Avatar
Administrator
Hey! Look At Me!! I'm a Supporting Member!!
Administrator
iTrader: (22)
 
Joined: Aug 2003
Posts: 21,620
Likes: 1,252
From: Las Vegas, NV
Rep Power: 513
xRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond reputexRiCeBoYx has a reputation beyond repute
Re: understanding compression ratio

Originally Posted by Mad Dog Tannen
Lol...I hate word problems
haha. me, too. Like I said, I only caught it when I started typing to concur with you
 
Related Topics
Thread
Thread Starter
Honda Civic Forum
Replies
Last Post
nola000
Engine start problems
63
Feb 17, 2023 09:18 PM
NROD315
Mechanical Problems/Vehicle Issues and Fix-it Forum
8
Sep 12, 2015 02:46 PM




All times are GMT -5. The time now is 02:38 PM.