Ford Sierra/Sapphire/RS500 Cosworth This forum is for discussion of all things pertaining to the Ford Sierra Cosworth.

YB compression height

Thread Tools
 
Search this Thread
 
Old 05-12-2014, 08:17 AM
  #1  
MedFin
15000
Thread Starter
 
MedFin's Avatar
 
Join Date: Nov 2009
Location: Finland
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Default YB compression height

Hi all,

what might be the stock piston compression height 4wd or 2wd if there is any difference?

Thx
Old 06-12-2014, 09:08 AM
  #2  
MedFin
15000
Thread Starter
 
MedFin's Avatar
 
Join Date: Nov 2009
Location: Finland
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Default

No one knows?
Old 08-12-2014, 09:46 AM
  #3  
oohogwash1
PassionFord Regular
 
oohogwash1's Avatar
 
Join Date: Jul 2007
Posts: 450
Likes: 0
Received 1 Like on 1 Post
Default

Away from home so cannot go measure my collection of pistons. But generally there is a difference in the piston crown in the dish. In my case I measured the volume of the head I am using, head gasket size and then had the pistons made to match the compression ratio and head and squish band required. If you are looking for something non standard you will likely have to do something similar.

There are a few engine builders you can get support from in this regard.
Old 08-12-2014, 12:55 PM
  #4  
MedFin
15000
Thread Starter
 
MedFin's Avatar
 
Join Date: Nov 2009
Location: Finland
Posts: 46
Likes: 0
Received 0 Likes on 0 Posts
Default

If can measure the standard 4wd pistons compression height that would be great
Old 08-12-2014, 12:59 PM
  #5  
Turbosystems
Super Moderator

iTrader: (5)
 
Turbosystems's Avatar
 
Join Date: May 2003
Location: home
Posts: 12,849
Received 50 Likes on 43 Posts
Default

2 and 4wd std mahle pistons have the same compression height
Old 14-12-2014, 05:42 AM
  #6  
oohogwash1
PassionFord Regular
 
oohogwash1's Avatar
 
Join Date: Jul 2007
Posts: 450
Likes: 0
Received 1 Like on 1 Post
Default

but are the tops of pistons the same shape ?
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Prickly_buzz
Technical help Q & A
4
07-12-2017 09:52 PM
abz474
Cars for Sale
9
01-11-2015 06:53 PM
Fezman1
Ford Sierra/Sapphire/RS500 Cosworth
1
02-10-2015 01:22 PM
SMILER258
Restorations, Rebuilds & Projects.
36
28-09-2015 09:04 AM
Topjoe9
Ford Sierra/Sapphire/RS500 Cosworth
5
12-09-2015 09:50 AM



Quick Reply: YB compression height



All times are GMT. The time now is 06:41 AM.