Login    Forum    Search    FAQ

Board index » Racing Forum » Engine & Cylinder Head Tech




Post new topic Reply to topic  [ 7 posts ] 
Author Message
 Post Posted: Sun Feb 06, 2011 11:35 am 
Offline

Joined: Wed Mar 11, 2009 4:14 pm
Posts: 116
just stripped my engine down.. its a sbc 408.. need to get the compression ratio..
9.025 deck height
piston has 16cc bowl in it and is 24 thou down the hole
head has 57cc chamber
gasket is 40 thou thick
bore is 4.165
stroke is 3.75
anyone know what the cr is


Top 
 Profile  
 
 Post Posted: Sun Feb 06, 2011 12:04 pm 
Offline
Moderator
User avatar

Joined: Tue Apr 18, 2006 3:20 pm
Posts: 1457
Location: Missouri
With the numbers provided and estimating 9.1cc gasket volume the CR would be 10.57.

Rick


Top 
 Profile  
 
 Post Posted: Sun Feb 06, 2011 12:09 pm 
Offline
User avatar

Joined: Wed Apr 19, 2006 4:11 pm
Posts: 2749
Location: Shepherdsville, KY
10.59 to 1 if the gasket is the same diameter as the bore.

_________________
Chuck Woloch

Chuck's Automotive
Full line Computech dealer
chucksautomotive@yahoo.com
Image


Top 
 Profile  
 
 Post Posted: Sun Feb 06, 2011 12:10 pm 
Offline
User avatar

Joined: Wed Apr 19, 2006 4:11 pm
Posts: 2749
Location: Shepherdsville, KY
I guess I was doing the math as Rick was posting.

_________________
Chuck Woloch

Chuck's Automotive
Full line Computech dealer
chucksautomotive@yahoo.com
Image


Top 
 Profile  
 
 Post Posted: Sun Feb 06, 2011 12:12 pm 
Offline

Joined: Wed Mar 11, 2009 4:14 pm
Posts: 116
thanks very much guys


Top 
 Profile  
 
 Post Posted: Sun Feb 06, 2011 2:25 pm 
Offline

Joined: Wed Mar 11, 2009 4:14 pm
Posts: 116
by the way,, if i were to deck the block to 9.0 how would it affect the compression,, how high would it be then


Top 
 Profile  
 
 Post Posted: Sun Feb 06, 2011 3:04 pm 
Offline

Joined: Wed Jan 12, 2011 1:28 am
Posts: 140
Location: N.W.
11.2

http://www.csgnetwork.com/compcalc.html


Top 
 Profile  
 
Display posts from previous:  Sort by  
 
Post new topic Reply to topic  [ 7 posts ] 

Board index » Racing Forum » Engine & Cylinder Head Tech


Who is online

Users browsing this forum: No registered users and 4 guests

 
 

 
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron