Generation III Internal Engine 1997-2006 LS1 | LS6
Sponsored by:
Sponsored by:

243 heads that were milled to 53cc

Thread Tools
 
Search this Thread
 
Old 10-15-2012, 09:54 PM
  #1  
Restricted User
Thread Starter
iTrader: (3)
 
daturbosix's Avatar
 
Join Date: May 2004
Location: Chicago
Posts: 91
Likes: 0
Received 0 Likes on 0 Posts
Default 243 heads that were milled to 53cc

looking at picking up a engine.. and the guy said the heads are milled to 53cc chambers.

so how much was it milled, about?
what does that do to my valve geometry?
what length pushrods do i need?
rockers?

ps, motor is complete minus pushrods and rockers... thats where this guys build came to a stop.
Old 10-15-2012, 10:32 PM
  #2  
Grr
TECH Fanatic
iTrader: (2)
 
Grr's Avatar
 
Join Date: Mar 2005
Location: Fargo ND
Posts: 1,363
Likes: 0
Received 1 Like on 1 Post

Default

depending on what gasket, they are milled around .085-.90,
with a .040 gasket depending on the cam 7.320 or so. need more info.
Old 10-15-2012, 10:34 PM
  #3  
Restricted User
Thread Starter
iTrader: (3)
 
daturbosix's Avatar
 
Join Date: May 2004
Location: Chicago
Posts: 91
Likes: 0
Received 0 Likes on 0 Posts
Default

edit: heres all the details i have at this time

383 short block K1 rotating assembly.
K1 crank 4.000 4340 crank.
K1 6.125 Forged H beams
Wiseco -32cc forged pistons.
Comp cam hydro roller lifters
With 64cc head motor would be 9.4-9.5 or so on comp ratio

LS6 243 Ported heads
New valve job.
Titanium retainers
Milled to a 53cc
2.055/1.6 stainless valves.
Manley valve springs good to .650

631/631 240/244 lobe center 111

Last edited by daturbosix; 10-15-2012 at 10:40 PM.
Old 10-15-2012, 11:00 PM
  #4  
TECH Senior Member
 
garygnu's Avatar
 
Join Date: Feb 2009
Posts: 5,446
Received 4 Likes on 4 Posts

Default

those valves will be close to the cylinder walls.
Old 10-15-2012, 11:09 PM
  #5  
Grr
TECH Fanatic
iTrader: (2)
 
Grr's Avatar
 
Join Date: Mar 2005
Location: Fargo ND
Posts: 1,363
Likes: 0
Received 1 Like on 1 Post

Default

that is an absolutely terrible setup, sorry but its not gonna make near the power it should. Why the huge dished piston then small chamber heads?? compression with those heads on it will be 9.4 unless you have a typo with the piston dish.
valves are gonna be shrouded to death
and that cam is entirely too big for that setup
Old 10-15-2012, 11:17 PM
  #6  
Restricted User
Thread Starter
iTrader: (3)
 
daturbosix's Avatar
 
Join Date: May 2004
Location: Chicago
Posts: 91
Likes: 0
Received 0 Likes on 0 Posts
Default

i believe it was suppose to be a boost motor, although i didnt want to run boost. i was just gonna toss it in a car and drive it the way it is.

but, that being said.. what changes should i make to make it the way it should be? set of pistons? different set of heads?
Old 10-16-2012, 06:21 AM
  #7  
Grr
TECH Fanatic
iTrader: (2)
 
Grr's Avatar
 
Join Date: Mar 2005
Location: Fargo ND
Posts: 1,363
Likes: 0
Received 1 Like on 1 Post

Default

well it will work to drive NA, I would definately go with a smaller cam though 23x/24x .600, otherwise its not gonna make anything down low. just dont expect to make huge power with it. Not to mention anything over .600 lift there is no way you will have enough piston to valve clearance
Old 10-16-2012, 08:04 AM
  #8  
TECH Apprentice
iTrader: (9)
 
velox65's Avatar
 
Join Date: Apr 2008
Location: Clinton, Ok
Posts: 367
Likes: 0
Received 0 Likes on 0 Posts

Default

Unless you got a killer deal I'd pass on it, seems like a mismatched combo to me.



Quick Reply: 243 heads that were milled to 53cc



All times are GMT -5. The time now is 09:00 AM.