LQ4 & LQ9, What is the differences between the two
Staging Lane
Joined: Oct 2008
Posts: 50
Likes: 0
From: on the edge
Damn I was hoping to find some answers. I was wondering the same thing.
I'm not sure but I believe that the LQ9 has flat top piston giving it more comp. I'm pretty sure that the cam, heads, mani, etc are all the same.?
Someone with more knowledge please chime in.
LQ4 & LQ9 are both 6.0 iron block aluminum head. (Early LQ4s had iron heads)
I'm not sure but I believe that the LQ9 has flat top piston giving it more comp. I'm pretty sure that the cam, heads, mani, etc are all the same.?
Someone with more knowledge please chime in.
LQ4 & LQ9 are both 6.0 iron block aluminum head. (Early LQ4s had iron heads)
12 Second Club
Joined: Nov 2005
Posts: 1,847
Likes: 0
from what i know the lq4 is an aluminum block and the lq9 in an iron block.
i have the lq9 in my 04 escalade ext and the powertrain in the truck is simular the the silverado ss.
my ext has the awd and the ho 6.0 345hp
i have the lq9 in my 04 escalade ext and the powertrain in the truck is simular the the silverado ss.
my ext has the awd and the ho 6.0 345hp
Trending Topics
Wow, a lot of misinformed responses. A quick search would have netted you the correct answer, but to clear the air with facts:
LQ4 and LQ9 are Gen3 engines, not Gen4 (like the LS2, LS3, L76), due to the location of the cam sensor and knock sensors.
LQ4 debuted in 1999
Displacement was/is 6.0L
1999-2000 had iron heads
1999-2000 had a crank adapter to mate the LQ4 with the 4L80 trans (not LS1 compatible)
Compression ratio was 9.5:1
Bloack was Iron
In 2001 the LQ9 was introduced
Both the LQ4 and LQ9 shared the iron block and new 317 heads (similar as the 243, but with larger 76cc chambers), hence both are 6.0L
The LQ9 had 10.4:1 compression ratio, versus the LQ4's 9.5:1
No longer did either 6.0L require the crank adapter for the trans, now works with LSx applications.
In 2004/5 6.0L recieved improved rod design
In 2005 the LS2 block was introduced
It is essentially the LQ9 with an aluminum block
LQ9 still offer with an iron block.
LQ4 and LQ9 are Gen3 engines, not Gen4 (like the LS2, LS3, L76), due to the location of the cam sensor and knock sensors.
LQ4 debuted in 1999
Displacement was/is 6.0L
1999-2000 had iron heads
1999-2000 had a crank adapter to mate the LQ4 with the 4L80 trans (not LS1 compatible)
Compression ratio was 9.5:1
Bloack was Iron
In 2001 the LQ9 was introduced
Both the LQ4 and LQ9 shared the iron block and new 317 heads (similar as the 243, but with larger 76cc chambers), hence both are 6.0L
The LQ9 had 10.4:1 compression ratio, versus the LQ4's 9.5:1
No longer did either 6.0L require the crank adapter for the trans, now works with LSx applications.
In 2004/5 6.0L recieved improved rod design
In 2005 the LS2 block was introduced
It is essentially the LQ9 with an aluminum block
LQ9 still offer with an iron block.
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Verdad Gallardo Wow, a lot of misinformed responses. A quick search would have netted you the correct answer, but to clear the air with facts:
LQ4 and LQ9 are Gen3 engines, not Gen4 (like the LS2, LS3, L76), due to the location of the cam sensor and knock sensors.
LQ4 debuted in 1999
Displacement was/is 6.0L
1999-2000 had iron heads
1999-2000 had a crank adapter to mate the LQ4 with the 4L80 trans (not LS1 compatible)
Compression ratio was 9.5:1
Bloack was Iron
In 2001 the LQ9 was introduced
Both the LQ4 and LQ9 shared the iron block and new 317 heads (similar as the 243, but with larger 76cc chambers), hence both are 6.0L
The LQ9 had 10.4:1 compression ratio, versus the LQ4's 9.5:1
No longer did either 6.0L require the crank adapter for the trans, now works with LSx applications.
In 2004/5 6.0L recieved improved rod design
In 2005 the LS2 block was introduced
It is essentially the LQ9 with an aluminum block
LQ9 still offer with an iron block.
LQ4 and LQ9 are Gen3 engines, not Gen4 (like the LS2, LS3, L76), due to the location of the cam sensor and knock sensors.
LQ4 debuted in 1999
Displacement was/is 6.0L
1999-2000 had iron heads
1999-2000 had a crank adapter to mate the LQ4 with the 4L80 trans (not LS1 compatible)
Compression ratio was 9.5:1
Bloack was Iron
In 2001 the LQ9 was introduced
Both the LQ4 and LQ9 shared the iron block and new 317 heads (similar as the 243, but with larger 76cc chambers), hence both are 6.0L
The LQ9 had 10.4:1 compression ratio, versus the LQ4's 9.5:1
No longer did either 6.0L require the crank adapter for the trans, now works with LSx applications.
In 2004/5 6.0L recieved improved rod design
In 2005 the LS2 block was introduced
It is essentially the LQ9 with an aluminum block
LQ9 still offer with an iron block.
Wow, a lot of misinformed responses. A quick search would have netted you the correct answer, but to clear the air with facts:
LQ4 and LQ9 are Gen3 engines, not Gen4 (like the LS2, LS3, L76), due to the location of the cam sensor and knock sensors.
LQ4 debuted in 1999
Displacement was/is 6.0L
1999-2000 had iron heads
1999-2000 had a crank adapter to mate the LQ4 with the 4L80 trans (not LS1 compatible)
Compression ratio was 9.5:1
Bloack was Iron
In 2001 the LQ9 was introduced
Both the LQ4 and LQ9 shared the iron block and new 317 heads (similar as the 243, but with larger 76cc chambers), hence both are 6.0L
The LQ9 had 10.4:1 compression ratio, versus the LQ4's 9.5:1
No longer did either 6.0L require the crank adapter for the trans, now works with LSx applications.
In 2004/5 6.0L recieved improved rod design
In 2005 the LS2 block was introduced
It is essentially the LQ9 with an aluminum block
LQ9 still offer with an iron block.
LQ4 and LQ9 are Gen3 engines, not Gen4 (like the LS2, LS3, L76), due to the location of the cam sensor and knock sensors.
LQ4 debuted in 1999
Displacement was/is 6.0L
1999-2000 had iron heads
1999-2000 had a crank adapter to mate the LQ4 with the 4L80 trans (not LS1 compatible)
Compression ratio was 9.5:1
Bloack was Iron
In 2001 the LQ9 was introduced
Both the LQ4 and LQ9 shared the iron block and new 317 heads (similar as the 243, but with larger 76cc chambers), hence both are 6.0L
The LQ9 had 10.4:1 compression ratio, versus the LQ4's 9.5:1
No longer did either 6.0L require the crank adapter for the trans, now works with LSx applications.
In 2004/5 6.0L recieved improved rod design
In 2005 the LS2 block was introduced
It is essentially the LQ9 with an aluminum block
LQ9 still offer with an iron block.
Staging Lane
Joined: Oct 2008
Posts: 50
Likes: 0
From: on the edge
So I was pretty much correct.
THREAD JACK: sorry
Now my question is: How many cc's is the dish in the LQ4 piston.
I'm trying to figue how much comp a stock LQ4 with 243 heads will have.
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/1009359-ls2-cam-ls1-lq4.html
THREAD JACK: sorry
Now my question is: How many cc's is the dish in the LQ4 piston.
I'm trying to figue how much comp a stock LQ4 with 243 heads will have.
https://ls1tech.com/forums/new-ls1-owners-newbie-tech/1009359-ls2-cam-ls1-lq4.html
So I was pretty much correct.
THREAD JACK: sorry
Now my question is: How many cc's is the dish in the LQ4 piston.
I'm trying to figue how much comp a stock LQ4 with 243 heads will have.
https://ls1tech.com/forums/showthread.php?t=1009359
THREAD JACK: sorry
Now my question is: How many cc's is the dish in the LQ4 piston.
I'm trying to figue how much comp a stock LQ4 with 243 heads will have.
https://ls1tech.com/forums/showthread.php?t=1009359
Thread Starter
On The Tree
Joined: Oct 2008
Posts: 178
Likes: 0
Wow, information, this is great, my wife is going to hate me for a while since now I am going to be studing all this stuff everyday.
Question on the LQ9 all aluminum engine, does anyone know what kind of HP this one comes with from the factory?
Just had a friend stop by and we were talking about these motors and he said he might know where a 6.0L with aluminum block is for sale with harness and computer, are these good motors??.
I have heard from one guy on the net who told me to stay away for the DoD motors, how can you tell them apart?
Question on the LQ9 all aluminum engine, does anyone know what kind of HP this one comes with from the factory?
Just had a friend stop by and we were talking about these motors and he said he might know where a 6.0L with aluminum block is for sale with harness and computer, are these good motors??.
I have heard from one guy on the net who told me to stay away for the DoD motors, how can you tell them apart?
Wow, information, this is great, my wife is going to hate me for a while since now I am going to be studing all this stuff everyday.
Question on the LQ9 all aluminum engine, does anyone know what kind of HP this one comes with from the factory?
Just had a friend stop by and we were talking about these motors and he said he might know where a 6.0L with aluminum block is for sale with harness and computer, are these good motors??
Question on the LQ9 all aluminum engine, does anyone know what kind of HP this one comes with from the factory?
Just had a friend stop by and we were talking about these motors and he said he might know where a 6.0L with aluminum block is for sale with harness and computer, are these good motors??
OK, so the LQ9 is has a composite/carbon fiber block, while the LQ4 is made of titanium. I think I got it now. 
**kidding**
I believe the LQ4 pistons have a dish just over 8cc's. The LQ9s have flat-tops which (I believe) are the same as LS2s.
**kidding**I believe the LQ4 pistons have a dish just over 8cc's. The LQ9s have flat-tops which (I believe) are the same as LS2s.
Teching In
Joined: Jul 2006
Posts: 37
Likes: 0
From: altoona,pa
Wow, a lot of misinformed responses. A quick search would have netted you the correct answer, but to clear the air with facts:
LQ4 and LQ9 are Gen3 engines, not Gen4 (like the LS2, LS3, L76), due to the location of the cam sensor and knock sensors.
LQ4 debuted in 1999
Displacement was/is 6.0L
1999-2000 had iron heads
1999-2000 had a crank adapter to mate the LQ4 with the 4L80 trans (not LS1 compatible)
Compression ratio was 9.5:1
Bloack was Iron
In 2001 the LQ9 was introduced
Both the LQ4 and LQ9 shared the iron block and new 317 heads (similar as the 243, but with larger 76cc chambers), hence both are 6.0L
The LQ9 had 10.4:1 compression ratio, versus the LQ4's 9.5:1
No longer did either 6.0L require the crank adapter for the trans, now works with LSx applications.
In 2004/5 6.0L recieved improved rod design
In 2005 the LS2 block was introduced
It is essentially the LQ9 with an aluminum block
LQ9 still offer with an iron block.
thank you very much to the guy who posted this thread and to the guy who posted the above information. I have a 2007 60 lq4 and I was getting on tonite to ask a question regarding parts interchange between my engine and ls blocks. If I am understanding correctly I will be able to use parts like intake, heads, water pump,ect. from any ls2 engine. Will I be able to use an earlier model 5 or 6 speed manual like out of out of an 99 or 2000 camaro behind my engine? please post any helpful responses.
LQ4 and LQ9 are Gen3 engines, not Gen4 (like the LS2, LS3, L76), due to the location of the cam sensor and knock sensors.
LQ4 debuted in 1999
Displacement was/is 6.0L
1999-2000 had iron heads
1999-2000 had a crank adapter to mate the LQ4 with the 4L80 trans (not LS1 compatible)
Compression ratio was 9.5:1
Bloack was Iron
In 2001 the LQ9 was introduced
Both the LQ4 and LQ9 shared the iron block and new 317 heads (similar as the 243, but with larger 76cc chambers), hence both are 6.0L
The LQ9 had 10.4:1 compression ratio, versus the LQ4's 9.5:1
No longer did either 6.0L require the crank adapter for the trans, now works with LSx applications.
In 2004/5 6.0L recieved improved rod design
In 2005 the LS2 block was introduced
It is essentially the LQ9 with an aluminum block
LQ9 still offer with an iron block.
thank you very much to the guy who posted this thread and to the guy who posted the above information. I have a 2007 60 lq4 and I was getting on tonite to ask a question regarding parts interchange between my engine and ls blocks. If I am understanding correctly I will be able to use parts like intake, heads, water pump,ect. from any ls2 engine. Will I be able to use an earlier model 5 or 6 speed manual like out of out of an 99 or 2000 camaro behind my engine? please post any helpful responses.
