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Ls1 intake vs. Ls6 intake

This is a discussion on Ls1 intake vs. Ls6 intake within the External Engine forums, part of the LSx Technical Help Section category; Granted I know the ls6 is better but what is the main difference between the two? If I took a ...

  1. #1
    Member knightryda01's Avatar
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    Ls1 intake vs. Ls6 intake

    Granted I know the ls6 is better but what is the main difference between the two?

    If I took a grinder and removed all the tabs off the ls1 intake lid would it make much difference?

    I have never inspected a ls6 intake so I could not tell ya what is different between the two

  2. #2
    Senior Member tatertot91's Avatar
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    Quote Originally Posted by knightryda01 View Post
    Granted I know the ls6 is better but what is the main difference between the two?

    If I took a grinder and removed all the tabs off the ls1 intake lid would it make much difference?

    I have never inspected a ls6 intake so I could not tell ya what is different between the two
    Larger plenum volume. Pretty much there is more volume inside for the air to go. The TB size is the same as well as the runners.
    Are you talking about the tabs on the bottom?

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    Moderator Cutlass's Avatar
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    A lid and and intake manifold are 2 different things. I assume your talking about an intake manifold, in which case tater nailed it.

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    Moderator Cutlass's Avatar
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    See how the bottom of the intakes are different. The LS1 curves up and the LS6 is flat. The LS6 has more volume because of that

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by Cutlass View Post
    A lid and and intake manifold are 2 different things. I assume your talking about an intake manifold, in which case tater nailed it.
    Now that you mention it, it does kinda sounds like he means the lid baffles

  6. #6
    The difference between an ls1 and an ls6 intake on a stockish ls1 is about 5-10wrh. I think im going to go with fast 92 soon

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by Mike0202 View Post
    The difference between an ls1 and an ls6 intake on a stockish ls1 is about 5-10wrh. I think im going to go with fast 92 soon
    Cam and/or heads too or just the intake?
    I got a fast 90 for a great deal, only reason i'm sticking with it but being stock i'm probably not gonna see much over an LS6 intake.

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    Member knightryda01's Avatar
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    I guess I asked 2 separate questions... lol

    Yes I did wonder what the diferences between the 2 intakes was... Too bad you coulden't just smooth it out like the ls6

    Also from the lid if I grinded down the tabs on the lid would that make a difference. Compared to an aftermarket lid would it be comparable or a waste of time?

    Just trying to not spend dum money

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    Senior Member tatertot91's Avatar
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    Quote Originally Posted by knightryda01 View Post
    Also from the lid if I grinded down the tabs on the lid would that make a difference. Compared to an aftermarket lid would it be comparable or a waste of time?

    Just trying to not spend dum money
    It might help a little, but its not going to be as beneficial as a lid would be. Did it on a friends v6, just snapped em off. A used lid can be had for $50 pretty easily.

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    Auto Painter RyanJM's Avatar
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    Never heard of any great gains by using a lager intake than the LS6 unless you got a big cam or heads and a cam then comes the larger intakes.
    1998 Trans Am 85k miles.
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    The cross section on the stock lid outlet is pretty small compared to an aftermarket lid. I did a side-by-side comparison of the stock piece and the SLP lid when I swapped it out. The difference was readily apparent.

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    no egr on ls6, right?

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    Moderator Cutlass's Avatar
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    Quote Originally Posted by needls1again View Post
    no egr on ls6, right?
    Correct, but if you want to keep EGR you can get the SLP LS6 intake with the EGR provision

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    I have an SLP Ls6 intake for sale in the classifieds, like mentioned already, it has the EGR provision. You can decide to run or not run the EGR (ie: if you live in cali and need to pass inspection). I have had the EGR deleted and the provision capped for a few years now with no issues.

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    Moderator Cutlass's Avatar
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    Quote Originally Posted by tiresmokindad View Post
    I think the ls6 now is better than that ls1. Can you provide pictures? So that we can determine what is the difference between the two.
    see post #4 in this thread^^^^^^^^^

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