Notices
GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

max overbore on 6.0L

Thread Tools
 
Search this Thread
 
Old 08-17-2004, 07:01 PM
  #1  
Staging Lane
Thread Starter
iTrader: (2)
 
Ram Air Tony's Avatar
 
Join Date: Dec 2001
Location: DFW, TX.
Posts: 93
Likes: 0
Received 0 Likes on 0 Posts
Default max overbore on 6.0L

what is the max you can overbore cylinders on the 6.0 L block???

found me a cheap shortblock with a couple bad cylinders and pistons....

another project and I aint even done with the current one

thanks in advance

RAT
02 Burb
01 Formy
01 Z oh
Old 08-17-2004, 07:54 PM
  #2  
Adkoonerstrator
iTrader: (4)
 
XLR8NSS's Avatar
 
Join Date: Nov 2001
Location: Deep in the seedy underworld of Koonerville
Posts: 21,436
Likes: 0
Received 3 Likes on 2 Posts
Default

Some blocks can go .060" over but, the cylinder walls need to be checked to make sure.
Old 08-17-2004, 08:33 PM
  #3  
TECH Fanatic
iTrader: (14)
 
Dark Halo's Avatar
 
Join Date: Aug 2004
Location: Texas
Posts: 1,505
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by Ram Air Tony
what is the max you can overbore cylinders on the 6.0 L block???

found me a cheap shortblock with a couple bad cylinders and pistons....

another project and I aint even done with the current one

thanks in advance

RAT
02 Burb
01 Formy
01 Z oh
yea I looked at the same block until I found out it would cost 300 to ship.
Old 08-17-2004, 11:40 PM
  #4  
TECH Addict
 
Yelo's Avatar
 
Join Date: Feb 2003
Location: Geneseo, NY
Posts: 2,864
Likes: 0
Received 1 Like on 1 Post
Default

.030 easily, .060 sonic'd, .090 if you're REALLY brave, and there was a couple of guys on another board that have supposedly gone .125 (supposedly the walls on the early '99-'00 blocks are thick enough to do it) but it's awfully hard to believe because the walls would be paper thin between cylinders......but at .125 over with a 4.125" stroke crank you'd get 454cid !!!
Old 08-18-2004, 04:35 PM
  #5  
Adkoonerstrator
iTrader: (4)
 
XLR8NSS's Avatar
 
Join Date: Nov 2001
Location: Deep in the seedy underworld of Koonerville
Posts: 21,436
Likes: 0
Received 3 Likes on 2 Posts
Default

Jeez, .125 is a whole lot for a 6.0L block. I've heard of .080" on a 6.0L but, never more than that. You're right those guys are brave.

.125" over with a 4.125" stroke is only a 441" though.
Old 08-18-2004, 11:31 PM
  #6  
TECH Addict
 
Yelo's Avatar
 
Join Date: Feb 2003
Location: Geneseo, NY
Posts: 2,864
Likes: 0
Received 1 Like on 1 Post
Default

oooops....I was doing the math for a 4.250 stroke......sorry

but a 441 would be pretty cool too
Old 08-21-2004, 08:38 AM
  #7  
Staging Lane
Thread Starter
iTrader: (2)
 
Ram Air Tony's Avatar
 
Join Date: Dec 2001
Location: DFW, TX.
Posts: 93
Likes: 0
Received 0 Likes on 0 Posts
Default

thanks for the info, didnt get the block....somebody pay over $200 for it

thanks again for the info

RAT
Old 08-21-2004, 09:49 AM
  #8  
TECH Enthusiast
 
derek_silvy's Avatar
 
Join Date: Jul 2004
Posts: 521
Likes: 0
Received 0 Likes on 0 Posts
Default

So, can the 5.3 be bored to the same displacement as the 6? The strokes are already the same, right? So just a big bore and some new pistons could make a 6L easy?
Old 08-21-2004, 11:05 AM
  #9  
Adkoonerstrator
iTrader: (4)
 
XLR8NSS's Avatar
 
Join Date: Nov 2001
Location: Deep in the seedy underworld of Koonerville
Posts: 21,436
Likes: 0
Received 3 Likes on 2 Posts
Default

4.8/5.3L can go out to ~3.9".
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
calsdad
8-Lug Truck Performance
34
06-14-2023 11:07 PM
02AWDAWSDenali
GM Engine & Exhaust Performance
2
10-01-2015 05:08 PM
old motorhead
FORCED INDUCTION
3
09-29-2015 08:22 PM
Forcefed81
GM Parts Classifieds
0
09-08-2015 10:02 PM



Quick Reply: max overbore on 6.0L



All times are GMT -5. The time now is 10:53 AM.