LS newbie and 6.0 build
Thread Starter
Teching In
Joined: Feb 2021
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LS newbie and 6.0 build I'm a long-time diesel/heavy equip mech and just getting into my first LS build.
This will be a daily driver boxed 72 Blazer frame, 1-ton axles, 6.0, 4L80e, 203/205 doubler transfer case, with a 72 reg cab and a short flatbed.
I picked up a high mileage LQ4 and this will be the base of the build, hopefully, lol.
In this 6.0 I am considering whatever I can do to get as much useable torque as possible. I am open to stroking, in my world cubic inches = torque, along with a long squirt of fuel, lol.
Here is what I am thinking, stroke a 6.0 to 4", CNC port and blend 823 rectangle heads, bump the compression up as high as I can, and run pump fuel, with a cam to compliment everything. What crank are they using to stroke these?
When your chambers do not allow you the compression that you are looking for do you shave the heads, run domed pistons, or weld up the chamber and machine it to what you want?
What size throttle body would complement this engine? Def drive by cable
I'd be really happy to get as close to 500 rwhp as possible with torque pretty close.
But losing some top-end power for midrange torque is not an issue.
Looking forward to hearing from the voices of experience,
I don't feel the need to learn all my lessons the hard way, lol.
This will be a daily driver boxed 72 Blazer frame, 1-ton axles, 6.0, 4L80e, 203/205 doubler transfer case, with a 72 reg cab and a short flatbed.
I picked up a high mileage LQ4 and this will be the base of the build, hopefully, lol.
In this 6.0 I am considering whatever I can do to get as much useable torque as possible. I am open to stroking, in my world cubic inches = torque, along with a long squirt of fuel, lol.
Here is what I am thinking, stroke a 6.0 to 4", CNC port and blend 823 rectangle heads, bump the compression up as high as I can, and run pump fuel, with a cam to compliment everything. What crank are they using to stroke these?
When your chambers do not allow you the compression that you are looking for do you shave the heads, run domed pistons, or weld up the chamber and machine it to what you want?
What size throttle body would complement this engine? Def drive by cable
I'd be really happy to get as close to 500 rwhp as possible with torque pretty close.
But losing some top-end power for midrange torque is not an issue.
Looking forward to hearing from the voices of experience,
I don't feel the need to learn all my lessons the hard way, lol.
Thread Starter
Teching In
Joined: Feb 2021
Posts: 5
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Basically a daily driver, I'd say average RPMs up to 4000 cruising around town but it will be driven fairly hard at times also and I would like some performance.
I just havent seen many posts or articles where guys have replaced pistons or stroked an LS. Most are taking a "take out" engine and maybe changing the cam and lifters and calling it good. Seeing that this engine will more than likely need to be bored, I am already planning on buying pistons so may as well take it to a 4" stroke at the same time to gain the cubic inches.
I just havent seen many posts or articles where guys have replaced pistons or stroked an LS. Most are taking a "take out" engine and maybe changing the cam and lifters and calling it good. Seeing that this engine will more than likely need to be bored, I am already planning on buying pistons so may as well take it to a 4" stroke at the same time to gain the cubic inches.
Last edited by Bucky B; Mar 2, 2021 at 01:58 PM.
For $5,000 I would do 408 stroker setup
706 heads,
Cam around 215-220 intake duration and a tight LSA
TBSS intake (Or 07+ 4.8/5.3 intake)
get the compression around 11:1
you would have an absolute torque monster and still be making an easy 500hp
Just my opinion, you could also just keep the engine stock and do a LSA blower or a small turbo setup and make even more power
706 heads,
Cam around 215-220 intake duration and a tight LSA
TBSS intake (Or 07+ 4.8/5.3 intake)
get the compression around 11:1
you would have an absolute torque monster and still be making an easy 500hp
Just my opinion, you could also just keep the engine stock and do a LSA blower or a small turbo setup and make even more power
Last edited by Ls7colorado; Mar 3, 2021 at 06:41 AM.
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Brett Foote Thread Starter
Teching In
Joined: Feb 2021
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What is the easiest way to raise the compression if the heads do not give me everything I want?
I'm not a fan of shaving the heads so that just leaves pistons?
What crank and rods are they using to stroke these things?
What is the max they can be stroked?
I saw something earlier about a 468 ci stroker. That gets my attention, c.i. = torque
Why 706 over 823? Isn't that sacrificing intake valve size and flow?
I'm not a fan of shaving the heads so that just leaves pistons?
What crank and rods are they using to stroke these things?
What is the max they can be stroked?
I saw something earlier about a 468 ci stroker. That gets my attention, c.i. = torque
Why 706 over 823? Isn't that sacrificing intake valve size and flow?
What is the easiest way to raise the compression if the heads do not give me everything I want?
I'm not a fan of shaving the heads so that just leaves pistons?
What crank and rods are they using to stroke these things?
What is the max they can be stroked?
I saw something earlier about a 468 ci stroker. That gets my attention, c.i. = torque
Why 706 over 823? Isn't that sacrificing intake valve size and flow?
I'm not a fan of shaving the heads so that just leaves pistons?
What crank and rods are they using to stroke these things?
What is the max they can be stroked?
I saw something earlier about a 468 ci stroker. That gets my attention, c.i. = torque
Why 706 over 823? Isn't that sacrificing intake valve size and flow?
Ive been reading good things on the summit brand forged rotating assembly's but there are others also that have been out a while.
4" seems to be the sweet spot, some go over that but you seem to start pulling the piston down pretty far in the bore. I have no first hand experience with $troker$ though.
706>823 for torque or low speed power, big valves and ports dont help low RPM torque. Did you watch the video?
The 706 will make less peak numbers than 823 but the 823's will be shifting the power curve much higher in the RPM range and sacrificing alot of torque where it counts in a TRUCK. If this was a CAR I would go with 823's
Basically the 706 made MORE power till 4,000 RPM then after 5,000 the 823 made more power.
Last edited by Ls7colorado; Mar 4, 2021 at 06:30 AM.
