Notices
GMT 900 Trucks General Discussion 2007 - 2013 Trucks | General Discussion

Stock Heads on 5.3l LY5 motor

Thread Tools
 
Search this Thread
 
Old 02-19-2009, 01:52 PM
  #1  
Registered User
Thread Starter
 
BDA01SVT's Avatar
 
Join Date: Feb 2009
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
Default Stock Heads on 5.3l LY5 motor

I tried using the search button but i cant find the info... I know the specs of the LY5 motor 9.9:1 CR but what heads are on this motor? CC Volume, head Model # Etc?

Im trying to map out a route that will eventually involve a roots blower, heads and Cam but i cant seem to find out what heads these are... wouldnt want to increase the CR, would rather find heads with a higher CC volume to bring it down a bit so i can be safer on more boost...

guess if i cant do that then ill just build a 6.0L and put in dished pistons... its for a 07 tahoe with a 5.3L... eventually i want it to be my tow rig for a small toy trailer and small car trailer... about 6K lbs max...

Old 02-19-2009, 02:00 PM
  #2  
TECH Resident
 
nighthawk08's Avatar
 
Join Date: Nov 2006
Location: San Antonio
Posts: 881
Likes: 0
Received 1 Like on 1 Post
Default

799 or 243...64.5 cc...flat top pistons
Old 02-19-2009, 02:03 PM
  #3  
Registered User
Thread Starter
 
BDA01SVT's Avatar
 
Join Date: Feb 2009
Posts: 16
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by nighthawk08
799 or 243...64.5 cc...flat top pistons

Thanks!

this helps alot...

so some 67cc LS1 ported heads would drop the CR a little... so i could run a bit more boost... hmmm?

dang im gonna need more money...
Old 02-19-2009, 03:57 PM
  #4  
On The Tree
 
Rage_89's Avatar
 
Join Date: Aug 2007
Location: Oklahoma
Posts: 129
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by BDA01SVT

dang im gonna need more money...
Story of my life.
Old 02-19-2009, 04:02 PM
  #5  
11 Second Truck Club
iTrader: (31)
 
bluecajun5.3's Avatar
 
Join Date: Jan 2005
Location: Breaux Bridge, LA
Posts: 5,861
Likes: 0
Received 0 Likes on 0 Posts
Default

i have a set of 317's in good condition that i would be willing to trade.
the combustion chamber on these are 71cc.
Old 02-19-2009, 05:37 PM
  #6  
TECH Fanatic
iTrader: (14)
 
schino's Avatar
 
Join Date: Jul 2008
Location: flemington nj
Posts: 1,103
Likes: 0
Received 0 Likes on 0 Posts
Default

what about lower boost on higher compression? in theory its all just cylinder pressures.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
BennyB
GM Parts Classifieds
15
08-01-2015 08:48 AM
lxcoupe
FORCED INDUCTION
8
07-21-2015 02:12 AM
Suburban2500
INTERNAL ENGINE MODIFICATIONS
31
07-19-2015 04:50 PM
jmarkway
GM Parts Classifieds
2
07-18-2015 09:23 PM
chevy1224
8-Lug Truck Performance
0
07-13-2015 07:50 AM



Quick Reply: Stock Heads on 5.3l LY5 motor



All times are GMT -5. The time now is 06:43 AM.