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LS1 or LS6

This is a discussion on LS1 or LS6 within the Internal Engine forums, part of the LSx Technical Help Section category; ok i know i saw it on here before but i can't find it. i just bought an 02 and ...

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    CHASEM mpdcnva's Avatar
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    LS1 or LS6

    ok i know i saw it on here before but i can't find it. i just bought an 02 and find it to have more punch than my 00. i heard in the end, gm was running out of ls1's and used ls6's to finish the line. are there any identification numbers to look for to see if this is an ls6. please help me understand this crap.thx

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    Senior Member MadSeason's Avatar
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    Quote Originally Posted by mpdcnva
    ok i know i saw it on here before but i can't find it. i just bought an 02 and find it to have more punch than my 00. i heard in the end, gm was running out of ls1's and used ls6's to finish the line. are there any identification numbers to look for to see if this is an ls6. please help me understand this crap.thx

    The only difference could be the block, GM built ls1's all the way to 2004. There was never a shortage. They found out one of the plants that made the blocks had better breathing waterjackets and stayed cooler so they had them make the blocks for the LS6 when that came out. Some found their way into some 01 & 02 Cars, The only difference you might be noticing is from the LS6 Manifold that came on the cars starting in 2001 giving it more power under the curve and some more top end.

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    Senior Member INMY01TA's Avatar
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    No f bodies came with LS6 engines. Some have LS1 engines with an LS6 block which means nothing.
    Last edited by INMY01TA; 04-19-2006 at 09:43 PM.

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    Quote Originally Posted by mpdcnva
    ok i know i saw it on here before but i can't find it. i just bought an 02 and find it to have more punch than my 00. i heard in the end, gm was running out of ls1's and used ls6's to finish the line. are there any identification numbers to look for to see if this is an ls6. please help me understand this crap.thx
    it was the opposite..they had to many ls6 blocks, but having a ls6 block doesn't really mean anything.

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    They also changed the exhaust manifolds in 01' so thats why the rating went up for the last two years of the f-body.

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    Senior Member INMY01TA's Avatar
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    Quote Originally Posted by junkman
    They also changed the exhaust manifolds in 01' so thats why the rating went up for the last two years of the f-body.
    LS6 intake played a big part in that as well.

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    Quote Originally Posted by mpdcnva
    ok i know i saw it on here before but i can't find it. i just bought an 02 and find it to have more punch than my 00. i heard in the end, gm was running out of ls1's and used ls6's to finish the line. are there any identification numbers to look for to see if this is an ls6. please help me understand this crap.thx

    While everyone else is trying to have a war over when and what was used I will try to answer a question or two for you.
    Yes in 01' and 02' Some F-Bodies did recieve the LS6 BLOCK, (not engine) all did have a revised LS6 intake installed though with better exaust manifolds. The difference you may be feeling could be it may have a Vette Cam. The last few thousand to leave the production line in 02' left with a Vette Cam because they actually ran out of cams for the LS1's. So they borrowed from the Vette. The only way to tell this is to pull a valve cover and check the lobe lift on the cam at the pushrod, (not worth it) Sorry but thats the only way to tell. As far as the block goes though.... There will be an identification stamping in the back on the driverside on top of the casting. You can then look this up and find out if you have one of the LS6 blocks. I was fortunate enough to get my 02' with both the LS6 block and the Vette Cam.
    Hope this helps you out a bit

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    Support HR 1146 jking's Avatar
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    Quote Originally Posted by CamaroCrazyChris
    While everyone else is trying to have a war over when and what was used I will try to answer a question or two for you.
    Yes in 01' and 02' Some F-Bodies did recieve the LS6 BLOCK, (not engine) all did have a revised LS6 intake installed though with better exaust manifolds. The difference you may be feeling could be it may have a Vette Cam. The last few thousand to leave the production line in 02' left with a Vette Cam because they actually ran out of cams for the LS1's. So they borrowed from the Vette. The only way to tell this is to pull a valve cover and check the lobe lift on the cam at the pushrod, (not worth it) Sorry but thats the only way to tell. As far as the block goes though.... There will be an identification stamping in the back on the driverside on top of the casting. You can then look this up and find out if you have one of the LS6 blocks. I was fortunate enough to get my 02' with both the LS6 block and the Vette Cam.
    Hope this helps you out a bit

    I've never heard that.

    I think that in 01' they changed the cam profile to specs similar to the 5.3 truck engine, which gave it a broader powerband, but took a little off of the high end.

    In order to compensate for the loss, they added the LS6 intake and better manifolds.

    I'm pretty sure that the Fbodies and C5's had the exact same cam specs.

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    Support HR 1146 jking's Avatar
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    Here you go-

    1998 - 2000 Fbody
    202/210 int/exh @ 0.05" duration
    0.496" / 0.496" int/exh lift
    116 LSA

    2001 - 2002 Fbody
    197/207 int/exh @ 0.05" duration
    0.467" / 0.479" int/exh lift
    116 LSA
    5.3 LM7
    190/191 int/exh @ 0.05" duration
    0.466" / 0.457" int/exh lift
    114 LSA
    And the C5-

    Here is the specs of the different C5 model years and LS1/LS6 stock cams

    LS1 Lift Duration LSA Timing
    97-99 .479/.472 207/199 117 113/121
    2000 .500/.500 209/198 115.5 112/119
    01-03 .479/.467 207/196 116 117/115

    LS6
    2001 .535/.525 211/204 116 114/118
    02-03 .551/.555 218/204 117.5 115/120
    Last edited by jking; 04-25-2006 at 09:34 PM.

  10. #10
    Quote Originally Posted by mpdcnva
    ok i know i saw it on here before but i can't find it. i just bought an 02 and find it to have more punch than my 00. i heard in the end, gm was running out of ls1's and used ls6's to finish the line. are there any identification numbers to look for to see if this is an ls6. please help me understand this crap.thx
    you may or may not have a LS6 block, but what you do have is an LS6 intake and 28lb injectors (vs 26lb) and thats why the power diff

    D

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    Junior Member crawlingt's Avatar
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    [QUOTE= The difference you may be feeling could be it may have a Vette Cam.[/QUOTE]

    I thought i read on here that the vette cam was a milder cam then the camaro.

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