General Car Related Discussion. To discuss anything that is related to cars and automotive technology that doesnt naturally fit into another forum catagory.

Working out compression ratio

Thread Tools
 
Search this Thread
 
Old 01-06-2009, 08:50 AM
  #1  
boost mad
PassionFord Post Whore!!
Thread Starter
iTrader: (8)
 
boost mad's Avatar
 
Join Date: Sep 2004
Location: sussex
Posts: 6,289
Likes: 0
Received 3 Likes on 3 Posts
Default Working out compression ratio

picture the scene.

4x4 yb, lets assume everything is standard apart from the pistons which are 93mm and have a comp height of 38mm ( i think ) what C/R would this give.

thank you my lovelys

Last edited by boost mad; 01-06-2009 at 05:57 PM.
Old 01-06-2009, 03:44 PM
  #2  
boost mad
PassionFord Post Whore!!
Thread Starter
iTrader: (8)
 
boost mad's Avatar
 
Join Date: Sep 2004
Location: sussex
Posts: 6,289
Likes: 0
Received 3 Likes on 3 Posts
Default

upski
Old 01-06-2009, 10:02 PM
  #3  
boost mad
PassionFord Post Whore!!
Thread Starter
iTrader: (8)
 
boost mad's Avatar
 
Join Date: Sep 2004
Location: sussex
Posts: 6,289
Likes: 0
Received 3 Likes on 3 Posts
Default

someone, anyone, please lol
Old 01-06-2009, 10:03 PM
  #4  
yappstar
BANNED
BANNED
 
yappstar's Avatar
 
Join Date: Sep 2008
Location: london
Posts: 496
Likes: 0
Received 0 Likes on 0 Posts
Default

http://www.csgnetwork.com/compcalc.html
Old 01-06-2009, 10:12 PM
  #5  
boost mad
PassionFord Post Whore!!
Thread Starter
iTrader: (8)
 
boost mad's Avatar
 
Join Date: Sep 2004
Location: sussex
Posts: 6,289
Likes: 0
Received 3 Likes on 3 Posts
Default

i found a couple of calculators. the only problem is i dont no the size of the combustion chamber nor the compressed thickness of the head gasket
Old 01-06-2009, 10:17 PM
  #6  
yappstar
BANNED
BANNED
 
yappstar's Avatar
 
Join Date: Sep 2008
Location: london
Posts: 496
Likes: 0
Received 0 Likes on 0 Posts
Default

http://www.fastfordmag.co.uk/resourc...AF265.tech.pdf

"a std YB has a clearance with gasket of around 71.2cc"

Does that help? Ive not read the article in the link above, might be more specific in there
Old 02-06-2009, 09:05 AM
  #7  
boost mad
PassionFord Post Whore!!
Thread Starter
iTrader: (8)
 
boost mad's Avatar
 
Join Date: Sep 2004
Location: sussex
Posts: 6,289
Likes: 0
Received 3 Likes on 3 Posts
Default

Nice one, i forgot about those.

i think i have worked it out to be around 7.2:1


the next question is , is 93mm safe for a turbo application. its on a 200 block.


cheers
Old 02-06-2009, 10:28 AM
  #8  
yappstar
BANNED
BANNED
 
yappstar's Avatar
 
Join Date: Sep 2008
Location: london
Posts: 496
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by boost mad


the next question is , is 93mm safe for a turbo application. its on a 200 block.


cheers
I would say yes, but only based on the fact you can get 93mm pistons for a YB, I don't know how far you could push it for instance.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
YODI
Cars for Sale
5
30-08-2015 01:12 PM
155lee
Ford RS Cosworth Parts for Sale
0
14-08-2015 11:21 AM
Zoggon
Ford Sierra/Sapphire/RS500 Cosworth
5
10-08-2015 10:39 AM
Caddyshack
General Car Related Discussion.
15
04-08-2015 08:50 AM



Quick Reply: Working out compression ratio



All times are GMT. The time now is 09:28 AM.