LS engines are excellent swap candidates. Here we see one getting prepped for a Mazda Miata. (Image/Summit Racing – Tom’s Turbo Garage)
If you’re rebuilding or upgrading your GM LS motor, knowing the bore and stroke of your stock Chevy LS engine is critical.
It doesn’t matter if your LS is a Gen 3 or a Gen 4. It doesn’t matter if it is cast iron or aluminum. For all LS engines with the same displacement, the bore and stroke are the same. The chart below lists the stock bore and stroke measurements.
(Summit Racing’s Brian Nutter and Paul Spurlock contributed to this article.)
LS Engine Bore & Stroke Chart
| Engine Size | Bore | Stroke |
|---|---|---|
| 4.8L (293 c.i.d.) | 3.780 in. | 3.268 in. |
| 5.3L (325 c.i.d.) | 3.780 in. | 3.622 in. |
| 5.7L (346 c.i.d.) | 3.898 in. | 3.622 in. |
| 6.0L (364 c.i.d.) | 4.000 in. | 3.622 in. |
| 6.2L (376 c.i.d.) | 4.065 in. | 3.622 in. |
| 7.0L (427 c.i.d.) | 4.125 in. | 4.000 in. |
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NOTE: You can find engine specs and detailed engine upgrade advice for every LS and LS-based Vortec truck engine in one place: The Definitive Guide to LS Engine Specs and LS Engine Upgrades.
Are the heads interchangeable from the 5.3 to the 6.0?
5.3L heads will give you approximately a 50hp increase on a 6.0L
What kind of information is this?
They were for me.
80th 6.0
can i run 6.2 liter pistons on my 2001 lq4 6.0 ,?
From what I read, the iron blocks of the lq4 and lq9 can be board to fit the 6.2 LT. Pistons.
If someone was able to convert a 6 liter to a 6.2 lq9 or lq4 would this build be okay for a daily driver
Yes I build a 6.0 block with 6.2 pistons and also thru in a 4.8 crank and rods to make it destroked and thru it in my dirt track car and it all works great with 0 problems so far
With destroking this motor. What c.i.d is it now..
I race dirt track and will be running a 7000rpm 360 c.i.d max
If you bore the block .065″ over.
How much do itcost
Apparently more than your education…
“How much do it cost?” Learn the word Does. Sounding like a third grader
Do you feel better about yourself now?
I feel better after reading Jackon’s comment, yeah.
Will my gen v lt1 crank work in my gen Iv 6.0 steel block . I’ve got a rotating assembly out of 2015 corvette. And I have 2011 6.0 bored to 6.2 and was hoping I could use the rotating assembly will it work? Thanks
Will I need to clearance an LQ4 block to install a 4″ stroke crankshaft?
how does a 5.3 head give 50 more hp on a 6.0?
Higher compression ratio
Higher compression, smaller ports for higher velocity.
I Would also like to know why the 5.3 heads give 50hp to a 6.0? I didnt see a reply on the question.
Reduced combustion chamber size – increases compression ratio
How much can you bore a 5.3 & a 6.0?
Do 706 and 862 heads have a smaller combustion chamber which raises the compression ratio
Yes they are even slightly smaller than the 243 I think
Can you use 862 heads on a 5.7 liter.
I don’t see why not they work on 6.0l
I have a 07 6.2 is the cam the same from a 5.3?
No
What ya want is a 4.8 crank in a 6.2 block with longer rods and 9.0:1 forged pistons. A nice set of ls3 heads with Good springs and lifters can get 8-9KRPM.
Yeah, and no torque… Only make high rpm numbers.
The 4.8l and 5.3l have a factory bore of 3.779”. The 6.0l has a factory bore of 4.001” . And the 4.8l stroke is 3.267” . Just an FYI
That’s real close to the bore/stroke dimensions of the small block 327 cu in. 4” bore 3.25” stroke. That was always a very potent motor.
i seen a 4inch stroke crank what would i have to do rod wise in a stock lm7 i know it would defiantly be a torque minded engine if i just knew what parts would make it work.
THANK YOU GUYS FOR YOUR HELP BENCH RACING
How much can you bore out the 5.3 lc9 aluminum block? I can’t find references anywhere to how much you can go. I only want to go .020 over bore so I can stroke it to 363.