Bore a 6.0 to 6.2? - LS1TECH - Camaro and Firebird Forum Discussion

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Bore a 6.0 to 6.2?

Old 11-02-2011, 09:10 AM
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Default Bore a 6.0 to 6.2?

just wondering if it can be done, also what's the difference in stroke
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Old 11-02-2011, 10:22 AM
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Is this an iron block? Cuz you won't be able to get an aluminum one to that bore unless you change the sleeves.

Even an iron block will need to be checked at 0.080 overbore to get you the 6.2 displacement.

And this does nothing to stroke, the stroke is whatever you set the rotating assembly to.
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Old 11-02-2011, 11:07 AM
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You can take an iron block to 4.065" bore which is the stock bore for an LS3
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Old 11-02-2011, 12:11 PM
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I honed my 6.0L block out to 4.065", but I don't plan on making a lot of power with it. Not so sure it would be a good idea if you were building a big boost/nitrous combo.
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Old 11-02-2011, 12:20 PM
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Default Stroke

I was asking what is the difference between the 6.0 vs. 6.2 if there was a stroke difference.
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Old 11-02-2011, 12:23 PM
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I have done 2 4.065 iron blocks. Both making over 500+whp NA. Both times we used stock off the shelf LS3 pistons. One had stock LS3 rods the other had Callies. Two years later, Both are still strong runners today.
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Old 11-02-2011, 12:26 PM
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Where both of your motors done from 6.0 blocks?
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Old 11-02-2011, 07:43 PM
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Originally Posted by rdkonkel View Post
I was asking what is the difference between the 6.0 vs. 6.2 if there was a stroke difference.
Stroke is the same, the only difference is bore diameter and pistons.
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Old 05-14-2018, 08:19 PM
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So since its possible would it be cheaper to get a ls2 iron block and just bore it out and put in new pistons, since a ls2 is roughly $2000 cheaper
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Old 05-14-2018, 09:41 PM
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Originally Posted by Pvfdpinky View Post
So since its possible would it be cheaper to get a ls2 iron block and just bore it out and put in new pistons, since a ls2 is roughly $2000 cheaper
ALL LS2's were aluminum. The only iron 6.0's are truck engines like the LQ4 and LQ9 in the Gen III series. There are also Gen IV iron 6.0's but don't know the codes offhand.
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Old 05-14-2018, 11:34 PM
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Thompson motorsports offer a ls2 6.0 in iron and aluminium block, but under the aluminum its listed as new gen4 and under the iron block its listed as seasoned core 6.0, but in either case, get a 6.0 truck motor bore it out to be the same as ls3, throw ls3 heads and intake, shouldn't that make about the same power?
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Old 05-14-2018, 11:52 PM
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What are you putting this into? If it's a truck or drag machine, no problem with the iron block, but if it's something light that you want to handle thru curves, the iron block will mess up the handling to a degree. This is why iron block LS's never got put into Vettes or Camaros, or any other car, at the factory
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Old 05-15-2018, 12:04 AM
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Yes it would be in a truck, would that combo work and make roughly the same hp as a ls3? My current plan is to go with ls3 with trick flow heads, and fast lsxr intake and a stage 3 cam from brian tooley, but looks like it may be cheaper to get a 6.0 and bore it and run ls3 pistons, but if I remember right the ls3 has rectangular ports and the 6.0 has cathedral ports right?
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Old 05-15-2018, 09:35 AM
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It can be done, We don't generally like to see them over about 600HP when they are that large of a bore.
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Old 05-15-2018, 11:24 AM
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Originally Posted by rdkonkel View Post
I was asking what is the difference between the 6.0 vs. 6.2 if there was a stroke difference.
To answer your question the stroke is the same, 3.622

The 6.0 bore is 4.00"

The 6.2 bore is 4.065"
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Old 05-15-2018, 11:31 AM
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Originally Posted by Pvfdpinky View Post
So since its possible would it be cheaper to get a ls2 iron block and just bore it out and put in new pistons, since a ls2 is roughly $2000 cheaper
There's no such thing as an LS2 iron block. Period, ever.

Originally Posted by Pvfdpinky View Post
Thompson motorsports offer a ls2 6.0 in iron and aluminium block, but under the aluminum its listed as new gen4 and under the iron block its listed as seasoned core 6.0, but in either case, get a 6.0 truck motor bore it out to be the same as ls3, throw ls3 heads and intake, shouldn't that make about the same power?
Read the above post

What? An LS3 style build will make more than an LS2, it's bigger.

You need to do some reading and get a better understanding of what motors are what so that you ask the right questions. Your questions for the most part don't make sense.

Originally Posted by Pvfdpinky View Post
Yes it would be in a truck, would that combo work and make roughly the same hp as a ls3? My current plan is to go with ls3 with trick flow heads, and fast lsxr intake and a stage 3 cam from brian tooley, but looks like it may be cheaper to get a 6.0 and bore it and run ls3 pistons, but if I remember right the ls3 has rectangular ports and the 6.0 has cathedral ports right?
Would WHAT make the same power as an LS3.

Again, wrong place to ask all these questions this is someone else's thread that is trying to get questions answered, read up.

Yes you can make an iron LS3 if you take a 6.0 and bore it to 4.065 and put LS3 pistons in it. You can do an iron LS2 also. But they aren't an LS2 or an LS3 they are just built with the same stuff but have iron blocks. Yes ls3 is rectangular and 6.0 is cathedral.
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Old 05-15-2018, 04:55 PM
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Originally Posted by 00pooterSS View Post

Yes ls3 is rectangular and 6.0 is cathedral.
Some iron 6.0s came with Rectangular port heads also. The LY6 for example.
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Old 05-15-2018, 05:31 PM
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Originally Posted by G Atsma View Post
ALL LS2's were aluminum. The only iron 6.0's are truck engines like the LQ4 and LQ9 in the Gen III series. There are also Gen IV iron 6.0's but don't know the codes offhand.
I wanna say gen 4 ly6 had iron block l92 head's ,not 100% sure though. ...hope I don't get in trouble for posting on this old thread......I see the guy above me didnt.....lol
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Old 05-15-2018, 05:35 PM
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Originally Posted by dawgs74 View Post
I wanna say gen 4 ly6 had iron block l92 head's ,not 100% sure though. ...hope I don't get in trouble for posting on this old thread......I see the guy above me didnt.....lol
or a l96
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Old 05-15-2018, 05:41 PM
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Originally Posted by LLLosingit View Post
Some iron 6.0s came with Rectangular port heads also. The LY6 for example.
Good point, I was generalizing but I also wasn't really being accurate so it's good to correct that.


On those motors that are 4" bore with LS3 style heads, do you know if they run standard size valves? I wasn't able to find what the minimum bore size is for standard valve LS3 heads. I know they make small bore LS3 heads that can be put on 3.9 ish bores.

Last edited by 00pooterSS; 05-15-2018 at 06:15 PM.
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