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
Thanks for the information, im thinking about building a 6.0 with 4.8 crank and rods and 6.2 pistons, not much info out there with this combo, glad ive read this post and know some one has already built one and is running good so far … Thanks Jason
If you bore the block .065″ over.
I heard the six leaders get hot when you go over.0030 overbore
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.
Yes, jacking me off, lowered his self to a third grade standard.. I totally agree with you sir. people need to learn to be nice to one another ! ! Jackson mihoff h a h a h a!
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
The combustion chambers on 5.3 heads are about 10% less that the 5.7 or 6.0 heads giving about 1 point more to the compression ratio. If you have a 10 to 1 CR it will make it close to 11 to 1 CR. If you are going this way, I would match the ports between the heads and manifolds.
Why wouldn’t your Mill the factory heads of the 60 or get the 799 heads for it mail them bring up your compression and it’ll breathe better if you’re getting 50 out of 5.3 heads on a 60 they must be given out about a hundred LOL
I meant to say Mill them down you can go about 40 thousands of an inch
How much can you bore a 5.3 & a 6.0?
Don’t go over 30 depending on what you’re doing with it a lot of people have said they overheat cylinder walls get too thin
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
ayyyeee!
this is what Im trying to do
i wanna do ls7 rods, with a sawed off ls7 crank, in my iron LM7 block, with shaved 862 heads, prefferably with a 2″ valve stuffed in them, and then the Nextgen performance LSA adapter kit with a zl1 hat and one of them fancy ac powered glycol cryo-chillers…
ALL OF THE TORQUE
then if I can ever find anyone to help figure out the management for it (saw someone do this to an R34 Skyline so not entirely pipe dreams) I wanna replace my 250a 12v alternator with the 150ftlb 48v BAS from a Ram with the Etorque v8…
an undersquare blower motor will be torquey down low to start, tossing another 150ftlb at 0rpm will make it into a monster right off throttle
then Im bolting it to an NV45 with the NV awd Tcase…
i guess my question is… who wants to spitball pistons for said build?
im doing the heads and a BTR cam right now.
then I might actually snag another good empty iron block to build and just do a short block swap later on…
I can tell you I love my 6 l after BTR set me up a combination it works well!! Texas speed has the same combination.. they’re a little costly but they have figured out how to make that 60 wake up with a cup of Maxwell House in the morning!! Happy Motoring
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.
why 363?
just because it sounds cooler?
I CAN say trying to search “LS 360” Just brings back old mopar 360 stuff lol
admitt6I didn’t search 359 LS… but the 383 isnt really 383ci either sooo…
hello one qestion can I use crank from 5,3 5,7 6 in 6,2
They are the same stroke so you wouldn’t be gaining anything. Also, depending on year of 5.3 and 6.0, they would have either a 24x or 58x reluctor wheel. The 5.7 would be a 24x reluctor and the 6.2 is a 58x reluctor.
you presume a gain is the goal
maybe thats what hes got?
Hi i blew up my 5.7 and i was thinking of getting a 6.2 bottom end and putting on my AFR lsx 215 65cc heads and a gm hot cam, will this combo work.