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engine sizes

This is a discussion on engine sizes within the Internal Engine forums, part of the LSx Technical Help Section category; i read in GM high performance that a LS1 engine is a 346. and my friends keep telling me that ...

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    Junior Member BamBam87's Avatar
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    artic white
    2001 trans am ws6

    engine sizes

    i read in GM high performance that a LS1 engine is a 346. and my friends keep telling me that my car is a 350 and its pissing me off. but there both 5.7 Liters that i know of. so are those 2 engines pretty much the same? meaning by size

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    Senior Member JaycenK's Avatar
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    To be exact yes it is only 346. They don't understand the new LS series motors. Everything in the past that was 5.7L was called a 350 because it was the street name for the block. 350 blocks are a thing of the past with the newer LSX engines. They may not be true 350's but the engines breath better and make more power than gen 1 and gen2 350's from the factory.

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    Junior Member BamBam87's Avatar
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    artic white
    2001 trans am ws6

    nice, thanks for the info. so since the LS6 is the same engine size as a LS1, what are the different mods that the LS6 has that makes it different?

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    .and most factory 350's (old ones) are all iron. 2 totally different engines..
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    Quote Originally Posted by BamBam87 View Post
    nice, thanks for the info. so since the LS6 is the same engine size as a LS1, what are the different mods that the LS6 has that makes it different?
    Better flowing heads, bigger cam, and better flowing intake.

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    Senior Member 00z28bubba's Avatar
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    Quote Originally Posted by ls1camino View Post
    Better flowing heads, bigger cam, and better flowing intake.
    assuming its a full ls6 long block. but the bare block by itself has better coolant and oil routing throughout the engine. if i remember right because of the rerouting of coolant/oil lines the design ended up with stronder cylinder walls. as far as how strong i couldnt tell you.

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    Junior Member BamBam87's Avatar
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    artic white
    2001 trans am ws6

    so does a 2001 trans am WS6 come with a LS6 intake? or does it come with just the regular LS1 intake? i only ask cause thats what i heard and i wasnt sure

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    Senior Member 00z28bubba's Avatar
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    all ls1 f-bodies(z28,ss,formula,t/a,ws6, and firehawk) from 01 and up have the ls6 intake. it is a clear an upgrade from the ls1 on any 98-00 models.

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    Junior Member BamBam87's Avatar
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    artic white
    2001 trans am ws6

    thanks, do you know a sight where i can see where it says the LS6 intake is on the Ls1 on the 01 and up cars? thanks

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    King 0f n00bz shady milkman's Avatar
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    if you dont have a hose going into the neck of the intake..you got a ls6.

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    King 0f n00bz shady milkman's Avatar
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    blacker than wesleysnipes
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    its just common knowledge

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    Senior Member 00z28bubba's Avatar
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    notice the hose going in behind the throttle body. of course if needed a person can drill a hole for the egr. the only other way to tell is by part numbers which i have to search for
    ls1 intake
    Click for full size
    ls6 intake
    Click for full size

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    Quote Originally Posted by BamBam87 View Post
    nice, thanks for the info. so since the LS6 is the same engine size as a LS1, what are the different mods that the LS6 has that makes it different?

    Here ya go>>>>>>http://www.idavette.net/hib/ls6/page3.htm

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    NYSpeed.com WhatUpWhatUp's Avatar
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    Quote Originally Posted by SOMbitch View Post
    very nice link. good info.

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by 00z28bubba View Post
    all ls1 f-bodies(z28,ss,formula,t/a,ws6, and firehawk) from 01 and up have the ls6 intake. it is a clear an upgrade from the ls1 on any 98-00 models.
    But the 98-00 models had a slightly larger cam.

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