Generation III External Engine LS1 | LS6 | Bolt-Ons | Intakes | Exhaust | Ignition | Accessories
Sponsored by:
Sponsored by:

4.8 heads on 6.0

Thread Tools
 
Search this Thread
 
Old 02-24-2014, 03:51 PM
  #1  
Teching In
Thread Starter
 
Jones618's Avatar
 
Join Date: Jan 2014
Posts: 29
Likes: 0
Received 0 Likes on 0 Posts
Default 4.8 heads on 6.0

Is it possible to run 4.8l heads on a lq4 and what are the advantages for this. Obviously it would boost compression but is it a direct swap and would u see a descent hp gain
Old 02-24-2014, 05:42 PM
  #2  
TECH Fanatic
iTrader: (12)
 
joshua022's Avatar
 
Join Date: Apr 2007
Location: Douglasville, GA
Posts: 1,276
Likes: 0
Received 0 Likes on 0 Posts
Default

It will boost compression and is a direct swap, BUT it will cause valve shrouding because of the small combustion chambers on the larger bore.

I personally I wouldnt waste your time and money swapping them.
Old 02-24-2014, 07:19 PM
  #3  
TECH Junkie
iTrader: (5)
 
redtan's Avatar
 
Join Date: May 2008
Location: Belmont, MA
Posts: 3,764
Likes: 0
Received 15 Likes on 14 Posts

Default

BUT it will cause valve shrouding because of the small combustion chambers on the larger bore.
Not anymore shrouding that takes place on the original bore, so that's not an issue.

They will however lose power or be just about even with 6.0 heads, so it's not really worth it unless you port them.
Old 02-24-2014, 07:52 PM
  #4  
13 Second Truck Club
iTrader: (17)
 
726.0chevelle's Avatar
 
Join Date: Aug 2008
Location: baton rouge
Posts: 637
Likes: 0
Received 0 Likes on 0 Posts

Default

you will gain compression with any set of 4.8 heads but if its the 06 or earlier you will lose flow because of the smaller valves and runners. The only 4.8 heads Id put on a 6.0 is the 07 and later 799 or 243 casting heads.
Old 02-25-2014, 02:26 PM
  #5  
10 Second Club
iTrader: (37)
 
JRENIGAR's Avatar
 
Join Date: Dec 2010
Location: 72396
Posts: 2,069
Likes: 0
Received 1 Like on 1 Post

Default

Originally Posted by 726.0chevelle
you will gain compression with any set of 4.8 heads but if its the 06 or earlier you will lose flow because of the smaller valves and runners. The only 4.8 heads Id put on a 6.0 is the 07 and later 799 or 243 casting heads.
This...
Old 12-21-2018, 07:20 AM
  #6  
Registered User
 
Joelynn Carter's Avatar
 
Join Date: Dec 2018
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by 726.0chevelle
you will gain compression with any set of 4.8 heads but if its the 06 or earlier you will lose flow because of the smaller valves and runners. The only 4.8 heads Id put on a 6.0 is the 07 and later 799 or 243 casting heads.
will you gain torque from the larger 6.0 pistons?
Old 12-22-2018, 06:14 PM
  #7  
TECH Senior Member
 
G Atsma's Avatar
 
Join Date: Jun 2016
Location: Central Cal.
Posts: 20,874
Received 3,021 Likes on 2,352 Posts
Default

4.8 heads are the same as 5.3 heads of the same years. Putting them on a 6.0 will just choke it. As above, 243/799 heads will do you the most good on a 6.0
Old 10-30-2019, 10:06 PM
  #8  
Registered User
 
Paper Man's Avatar
 
Join Date: Oct 2019
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default

Yup. Sloppy Mechanics used 799 4.8 heads on this 6.0 with just a cam and I forget what injectors. Impressive for something so simple. The ultimate budget way to wake up a tired 6.0 it seems.

Old 10-30-2019, 10:57 PM
  #9  
TECH Senior Member
 
G Atsma's Avatar
 
Join Date: Jun 2016
Location: Central Cal.
Posts: 20,874
Received 3,021 Likes on 2,352 Posts
Default

Originally Posted by Paper Man
Yup. Sloppy Mechanics used 799 4.8 heads on this 6.0 with just a cam and I forget what injectors. Impressive for something so simple. The ultimate budget way to wake up a tired 6.0 it seems.

https://www.youtube.com/watch?v=HodXYJR0Zxo
Gotta be careful here. Only the Gen IV 4.8/5.3 engines have the 799/243 heads. The Gen III 4.8/5.3 used the 706 heads.
Old 11-03-2019, 01:38 PM
  #10  
"I MAID THEESE"
iTrader: (3)
 
Mavn's Avatar
 
Join Date: Jul 2011
Location: Houston
Posts: 2,744
Received 675 Likes on 425 Posts

Default

706 heads FTW !
The following users liked this post:
G Atsma (11-03-2019)
Old 11-03-2019, 01:47 PM
  #11  
TECH Senior Member
 
G Atsma's Avatar
 
Join Date: Jun 2016
Location: Central Cal.
Posts: 20,874
Received 3,021 Likes on 2,352 Posts
Default

Originally Posted by Mavn
706 heads FTW !
Yep, they seem to be proving their worth after being trashed for so long.



Quick Reply: 4.8 heads on 6.0



All times are GMT -5. The time now is 05:30 AM.