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Camaro V8 LS3 / L99 Engine, Exhaust, and Bolt-Ons Bolt-Ons | Intakes | Exhaust

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Old 06-08-2013, 09:03 PM   #1
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LS3 is like the ???

My wife asked me what the LS3 in my Camaro was comparible to, as in 327, 350, 383, 396, 409, 427... You get the jist. My neighbor has a BB 400 in his '67 Firebird. I couldn't really give her a straight answer looking at past engines and years.

So with that said, what do you believe it is equal to?
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Old 06-08-2013, 09:06 PM   #2
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376
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Old 06-08-2013, 09:11 PM   #3
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376 but that can change with a stroker
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Old 06-08-2013, 09:16 PM   #4
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376ci 6.162L but rounded up to a 6.2L
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Old 06-08-2013, 09:25 PM   #5
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Technically true pontiac engines were neither small or big block. Like the lsx series, their external dimensions were the same. I believe the cranks had either small or large journals. If you are referring to a 396 chevy that gained 4ci to become 400 then I apologize for inserting trivia into the thread.
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Old 06-08-2013, 09:43 PM   #6
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There is no comparison. The LS3 is 376Ci but it makes a lot more power and torque then any 60's small block, hell even big block. If those old engines had to go by today's power ratings, they would all be showing a lot less power and torque then their advertised numbers from back in the day.


In order of "best" to "worst" the LSx series would look like this (in terms of most HP to LEAST HP, excluding the truck variants):

LS9, LSA, LS7, LS3, LS6, LS2, LS1


The LS1 was the "new gen" 350 at only 346ci and since the LS3 is the "baseline" LS motor for every GM performance car, that would make the LS3 the new "350 of today". It's not directly comparable unfortunately but that's how it is.
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Old 06-08-2013, 09:56 PM   #7
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Originally Posted by 3rdgen3 View Post
There is no comparison. The LS3 is 376Ci but it makes a lot more power and torque then any 60's small block, hell even big block. If those old engines had to go by today's power ratings, they would all be showing a lot less power and torque then their advertised numbers from back in the day.
Exactly... Which was why I was finding it hard to define it for her.
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Old 06-08-2013, 10:00 PM   #8
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Originally Posted by 3rdgen3 View Post
There is no comparison. The LS3 is 376Ci but it makes a lot more power and torque then any 60's small block, hell even big block. If those old engines had to go by today's power ratings, they would all be showing a lot less power and torque then their advertised numbers from back in the day.


In order of "best" to "worst" the LSx series would look like this (in terms of most HP to LEAST HP, excluding the truck variants):

LS9, LSA, LS7, LS3, LS6, LS2, LS1


The LS1 was the "new gen" 350 at only 346ci and since the LS3 is the "baseline" LS motor for every GM performance car, that would make the LS3 the new "350 of today". It's not directly comparable unfortunately but that's how it is.
Forgot the LS4 not to be mistaken for the 454 but the 5.3L LS4
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Old 06-08-2013, 10:03 PM   #9
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i wouldnt say the ol 60's motors are not comparable . my old man is a sbc guy and those things can pump out some numbers. hes got a lil 64 nova with a 383 that will abliterate some nice 12" tires.
but the ls series is just more envirment friendly and 21 century friendly. tuning is easier vs having to do it by a screw driver changing jets , springs, rods. and all that in a carb.
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Old 06-08-2013, 10:04 PM   #10
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Forgot the LS4 not to be mistaken for the 454 but the 5.3L LS4
I excluded the LS4 on purpose because it is for FWD only applications, but you are right.

Put the LS4 at the end of the spectrum for 'least' HP, to the right of the LS1.
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Old 06-08-2013, 10:07 PM   #11
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i wouldnt say the ol 60's motors are not comparable . my old man is a sbc guy and those things can pump out some numbers. hes got a lil 64 nova with a 383 that will abliterate some nice 12" tires.
but the ls series is just move friendly and 21 century friendly.
See but we're trying to compare stock for stock (at least thats what the assumption was) and since there is no such thing as a 383sbc from the factory, it doesn't count

I'm not hating on small blocks nor am i saying they're not capable. I've been building/rocking small blocks my whole life..but you cant compare the 23* sbc to a 15* LSx, im sorry, but stock for stock, the LSx outclasses ANY factory made sbc in every way (HP, TQ, MPG, Efficiency, etc).

Built SBC vs Built LSx is a whole other topic..let's try NOT to go there
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Old 06-08-2013, 10:13 PM   #12
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Forgot the LS4 not to be mistaken for the 454 but the 5.3L LS4
It was the Ls6 that was the 454BB lol
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Old 06-08-2013, 11:13 PM   #13
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It was the Ls6 that was the 454BB lol
You might wanna take 454 101... The LS6 is a 454 correct rated @ 450hp the LS5 rated 2 390hp, and LS4 rated @ 275hp the LS7 rated @ 465hp....

http://en.wikipedia.org/wiki/Chevrolet_Big-Block_engine




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Old 06-09-2013, 12:09 AM   #14
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Quote:
Originally Posted by 3rdgen3 View Post
There is no comparison. The LS3 is 376Ci but it makes a lot more power and torque then any 60's small block, hell even big block. If those old engines had to go by today's power ratings, they would all be showing a lot less power and torque then their advertised numbers from back in the day.
If they would have had K&N intakes and Shorty headers, they'd be going to the moon with them.
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Old 06-09-2013, 12:15 AM   #15
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If they would have had K&N intakes and Shorty headers, they'd be going to the moon with them.
I think I missed that one.. Is that some sort of C5 Forum inside joke or are you trying to poke fun at me?
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Old 06-09-2013, 12:19 AM   #16
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I think I missed that one.. Is that some sort of C5 Forum inside joke or are you trying to poke fun at me?
inside joke.
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Old 06-09-2013, 12:55 AM   #17
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The G8 GXP was the fastest and strongest production vehicle that Pontiac ever produced(advertised by Pontiac as such). Had many tell me otherwise about the "big blocks" of the day that would hand its a$$ stock for stock.
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Old 06-09-2013, 01:02 AM   #18
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Quote:
Originally Posted by Hurst View Post
My wife asked me what the LS3 in my Camaro was comparible to, as in 327, 350, 383, 396, 409, 427... You get the jist. My neighbor has a BB 400 in his '67 Firebird. I couldn't really give her a straight answer looking at past engines and years.

So with that said, what do you believe it is equal to?
Tell her it's like a 377... SBC 400 block w/ a 350 crank...
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Old 06-09-2013, 01:10 AM   #19
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The G8 GXP was the fastest and strongest production vehicle that Pontiac ever produced(advertised by Pontiac as such). Had many tell me otherwise about the "big blocks" of the day that would hand its a$$ stock for stock.
sure is. I've told my buddies this also and hate that a 4door is walking all over there WS6 ram air lol!
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Old 06-09-2013, 09:37 AM   #20
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Originally Posted by 3rdgen3 View Post
See but we're trying to compare stock for stock (at least thats what the assumption was) and since there is no such thing as a 383sbc from the factory, it doesn't count

I'm not hating on small blocks nor am i saying they're not capable. I've been building/rocking small blocks my whole life..but you cant compare the 23* sbc to a 15* LSx, im sorry, but stock for stock, the LSx outclasses ANY factory made sbc in every way (HP, TQ, MPG, Efficiency, etc).

Built SBC vs Built LSx is a whole other topic..let's try NOT to go there
just the ls3 and ls7 and ls2 the rest can be compared to some factory bbc and few sbc. hp wise. the rest of the ls series dont really compare to those engines
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Old 06-09-2013, 07:18 PM   #21
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Quote:
Originally Posted by Hurst View Post
My wife asked me what the LS3 in my Camaro was comparible to, as in 327, 350, 383, 396, 409, 427... You get the jist. My neighbor has a BB 400 in his '67 Firebird. I couldn't really give her a straight answer looking at past engines and years.

So with that said, what do you believe it is equal to?
I think what you are missing is the units of piston displacement.

The LS3 is.......

6.2 liters

which roughly equals

376 cubic inches



....... you just need a handy volume unit converter
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Old 06-09-2013, 07:26 PM   #22
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She would compare to the old 427, 427 horsepower being the ls3 is bringing the same hp to the table !!!
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Old 06-09-2013, 08:06 PM   #23
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She would compare to the old 427, 427 horsepower being the ls3 is bringing the same hp to the table !!!
Whacha talking bout Willis?

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Old 06-09-2013, 08:22 PM   #24
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Old 06-09-2013, 08:49 PM   #25
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I think what you are missing is the units of piston displacement.

The LS3 is.......

6.2 liters

which roughly equals

376 cubic inches



....... you just need a handy volume unit converter
6.16L
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