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Intake Manifold

This is a discussion on Intake Manifold within the External Engine forums, part of the LSx Technical Help Section category; LS2 or LS6?? For a 402? Please explain why you choose what you did....

  1. #1
    Slow'er'Ass Mr. Luos's Avatar
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    Intake Manifold

    LS2 or LS6??

    For a 402?

    Please explain why you choose what you did.
    Last edited by Mr. Luos; 08-11-2005 at 01:23 PM.
    2008 Trailblazer SS
    Yank PTB3600, Kooks 1 7/8" LT's, 4" intake, E-fans, Magnaflow, Sonnax kit, tranny cooler, tune.
    Lowered, HID's, tinted.

    1999 Pontiac Trans Am WS.6 #1747 SOLD
    531.1 RWHP 481.3 FT/Pounds all motor.

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    member since may 2000 nhraformula's Avatar
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    Quote Originally Posted by Mr. Luos
    LS2 or LS6??

    For a 402?

    Please explain why you choose what you did.
    lsx manifold. it will outflow the others.
    the ls2 is fly by wire or whatever its called.
    2000 nhra edition formula
    a few bolt ons, 379 rwhp
    11.96 @113.25

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    Grand Imperial Wizard Sarge's Avatar
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    LSX. Period. Period.
    Flows....doesnt absorb the heat....weighs less.....what else is there?

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    Slow'er'Ass Mr. Luos's Avatar
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    Okay....LSX is outta the question, for now. Believe me, I want that.

    I already have an LS6 intake, which would sell for $300+
    I can get an LS2 intake for $200. But that would require a different TB wouldn't it?

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    Grand Imperial Wizard Sarge's Avatar
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    Yes it would.
    What are you trying to do?
    What mods have you now?
    What mods are you planning to do?

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    Slow'er'Ass Mr. Luos's Avatar
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    Well....my motor is outta the car.

    It is getting a 402ci. Iron block.
    Large cam, Patriot stage 2 LS6 heads. (not quite what I wanted on the heads, but I got a killer deal)
    Not huge compression, as I have later plans.

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    Grand Imperial Wizard Sarge's Avatar
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    Quote Originally Posted by Mr. Luos
    Well....my motor is outta the car.

    It is getting a 402ci. Iron block.
    Large cam, Patriot stage 2 LS6 heads. (not quite what I wanted on the heads, but I got a killer deal)
    Not huge compression, as I have later plans.
    I have the same heads.....Patriot got their stuff together...damn fine product.....if your going FI or nitrous why couldnt you port the intake you have now?

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    Slow'er'Ass Mr. Luos's Avatar
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    I suppose I could. I plan on going with the LSX 90/90 in the future. It was originally in the plans, but some things changed job wise, so....

    I will start a new thread in the Internal Section about my project. I still have a couple questions, and Patriot has offered to mill the heads for free if I would like. But I would have to PM him tonight if I want that done. Question is....piston to valve

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    Grand Imperial Wizard Sarge's Avatar
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    Are you working with Gunner at Patriot? Y'all can work the clearance etc. issues out between your cam/heads/pistons...maximize flow etc.....just a thought....have you looked into a Shaner Throttle Body? Some damn fine results come from him.....while your engine is out...mebbe you can send him your stocker...have him work his magic on it and you'd swear you already got your 90/90 Mebbe $125 tops....really makes a difference man.....

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    Slow'er'Ass Mr. Luos's Avatar
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    My throttle body is a stocker, but it is ported/polished.
    I have talked to TSP, who I got the motor from about the clearance, and they said I could mill the heads up to .050.
    Gunnar didn't think that was such a good idea.

    Cam is a 248/254 629/622 113
    Pistons are Mahle -12cc dish. Valve reliefs are decent sized. I was thinking a .020 mill.

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    Grand Imperial Wizard Sarge's Avatar
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    Quote Originally Posted by Mr. Luos
    My throttle body is a stocker, but it is ported/polished.
    I have talked to TSP, who I got the motor from about the clearance, and they said I could mill the heads up to .050.
    Gunnar didn't think that was such a good idea.

    Cam is a 248/254 629/622 113
    Pistons are Mahle -12cc dish. Valve reliefs are decent sized. I was thinking a .020 mill.
    Yeah .050 is a swipe for sure......020 is a clean up pass.....sounds like your putting this thing together right Mr. Luos...that cam has some lift doesn't it...that'll wake em up.....

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    Slow'er'Ass Mr. Luos's Avatar
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    Quote Originally Posted by Sarge
    sounds like your putting this thing together right Mr. Luos...
    Thank you.
    Put a lot of time into research. I really want to make sure I build this right.

    I PM'd Gunnar and asked him to call me tomorrow. I would like his opinion on it over the phone, that way I have his full attention. I know a lot of people are in front of a computer are doing other things as well.

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    Yes...like 20 month old Grandsons crawling on them wanting to go see Elmo on the sesame street website

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