GM's new LSx iron block
10-31-2006, 11:52 PM
#1
FormerVendor
Thread Starter
Join Date: May 2004
Location: Portland Oregon
Posts: 247
Likes: 0
Received 0 Likes
on
0 Posts
GM's new LSx iron block I am attending the SEMA show this week and today I was making my way through the GM Performance Parts displays. I saw their new LSx iron block that comes in either a standard or a tall deck. Both blocks are capable to accomadate a 4.500 bore
The standard deck can take up to a 4.50 stroke and the tall deck can handle a 4.250 bore! This means with the right combination of parts one can easily build a 500 inch LSx engine. The block is also made to accept ther new cylinder heads that has a extra head bolt per cylinder for those high boost applications. GM says it will easily handle 2500hp
http://www.gmgoodwrench.com/GMPerfor...6454&engCat=ls
The standard deck can take up to a 4.50 stroke and the tall deck can handle a 4.250 bore! This means with the right combination of parts one can easily build a 500 inch LSx engine. The block is also made to accept ther new cylinder heads that has a extra head bolt per cylinder for those high boost applications. GM says it will easily handle 2500hp http://www.gmgoodwrench.com/GMPerfor...6454&engCat=ls
Trending Topics
11-01-2006, 08:32 PM
#10
More info 100% CNC block cast iron
Siamese cylinder bores
6 head bolts per cylinder
Standard 4.400 bore spacing standard deck height
* 9.700 tall deck to follow *
Increase deck thickness
LS7 6 bolt doweled in place billet main caps
Max 4.500" Stroke
* tall deck only *
Capable of a 364 to 500+ cid tall deck for large displacement
True priority oiling system
Wet and dry sump capability
Deep skirted head bolt holes
Orange power coat
Maintains all OEM LS family exterior mounting features
Accepts all Gen III & LS heads, cranks, cams, etc...
Includes unique cam retainer, rear cover, lifter retainers and OEM camshaft bearings.
Front motor plate mounting holes added.
Added material above cam bearings for added strength.
Approximate finish weight 225 lbs
9.26 semi finished deck height
* standard deck height *
3.990" bore ready for honing
Maximun 4.250" bore @ .200 min. wall thickness
6 bolt LSX bolt pattern
11 mm standard bolts
8 mm exterior and interior bolts
Can be machined for 1/2" bolts/studs
All 5 cam bores for standard small OD bearings
* P/N 12453169 *
Can also be machined to 60 mm roller bearings
Added material around standerd .842" diameter lifter bore
Can also be machined for large lifters or 1.050" bronze bushings
O-ringed screw in soft plugs
Accommodates any LS small block oil pan and oil pump
Standard LS wet sump systems or LS7 dry sump systems fit
Extermal oil pump feed at the rear of block
Front oil line can be plugged and external oil pump or aftermarket dry sump system can be used
Belt cam drive can be accommodated
Seventh tranmission bolt hole added per early sbc
Main web bay to bay breathing holes for increased HP
Access windows for cylinder head stud access (intake side)
Extra breathing pockets added near starter for better windage
Coming March 2007
Is this the LS9 maybe?
Robert
Siamese cylinder bores
6 head bolts per cylinder
Standard 4.400 bore spacing standard deck height
* 9.700 tall deck to follow *
Increase deck thickness
LS7 6 bolt doweled in place billet main caps
Max 4.500" Stroke
* tall deck only *
Capable of a 364 to 500+ cid tall deck for large displacement
True priority oiling system
Wet and dry sump capability
Deep skirted head bolt holes
Orange power coat
Maintains all OEM LS family exterior mounting features
Accepts all Gen III & LS heads, cranks, cams, etc...
Includes unique cam retainer, rear cover, lifter retainers and OEM camshaft bearings.
Front motor plate mounting holes added.
Added material above cam bearings for added strength.
Approximate finish weight 225 lbs
9.26 semi finished deck height
* standard deck height *
3.990" bore ready for honing
Maximun 4.250" bore @ .200 min. wall thickness
6 bolt LSX bolt pattern
11 mm standard bolts
8 mm exterior and interior bolts
Can be machined for 1/2" bolts/studs
All 5 cam bores for standard small OD bearings
* P/N 12453169 *
Can also be machined to 60 mm roller bearings
Added material around standerd .842" diameter lifter bore
Can also be machined for large lifters or 1.050" bronze bushings
O-ringed screw in soft plugs
Accommodates any LS small block oil pan and oil pump
Standard LS wet sump systems or LS7 dry sump systems fit
Extermal oil pump feed at the rear of block
Front oil line can be plugged and external oil pump or aftermarket dry sump system can be used
Belt cam drive can be accommodated
Seventh tranmission bolt hole added per early sbc
Main web bay to bay breathing holes for increased HP
Access windows for cylinder head stud access (intake side)
Extra breathing pockets added near starter for better windage
Coming March 2007
Is this the LS9 maybe?
Robert
11-02-2006, 12:02 AM
#14
Banned
iTrader: (1)
Join Date: Nov 2004
Location: North of Seattle
Posts: 2,057
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by John B
Are you sure that this isn't 4.250"?
Nate
Anybody wanna buy a "slightly used" 402? 
