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  • #1

    Discovery!

    A while back I swapped out my small-port intakes for intakes from a 3400 1997 Chev Venture. While being 3400 intakes, the upper intake is still not as good flowing as the 2000+ 3400.

    As most of us know, the EGR routing is different from 99 and down, and we've either had to get an adapter or an exhaust manifold if possible to make the EGR connect.

    Last night I got my 2002 3400 upper intake and put it in place of the non-marked 1997 3400 UI.

    The new intake came off a motor with only 6k, and the EGR valve came with it... to make it work, I used my original EGR tube and simply bent it up to meet the port on the new manifold.
    I drilled a hole through the mounting plate of my stock EGR tube that lined up with the back of the new EGR... 2 gaskets, one stock bolt and 2 washers and PRESTO! She fit just fine. No leaks... no adapter.. fuck I'm a genius.
    Anyways... thats all I have to say about that. I think it must be luck that the 99 Malibus' EGR tube can be manipulted just so.
    Tags: None
  • #2
    Pics?
    Lifting my front wheels, one jack at a time.

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    • #3
      I knew this long time ago... and its not the EGR routing, its a indent across the bottom to make space for the injector wiring harness. I hate pre 2000 Intakes.

      Got Lope?
      3500 Build, Comp XFI Cam 218/230 .050 dur .570/.568 lift 113LSA
      Fully Balanced, Ported, 3 Angle Valve Job, 65mm TCE TB, S&S Headers.
      Stage-1 Raybestos/Alto 4t60e-HD, EP LSD, 3.69FDR
      12.61@105 Epping NH Oct 2015 Nitrous 100shot (melted plugs) 13.58@98.8 N/A 3200LBS

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      • #4
        Yeah. My 99 big port has that stupid dent in the neck, as where my 2001 is much smoother.
        95 Beretta- Lg8 Daily Driver
        94 Beretta z26- First ever 5-speed 3500 L body- In the works.

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        • #5
          yeah tell me about it. i found about the indent after i got done porting it for the 65mm throttlebody and i set the two intakes on my bed and then looked inside.
          needless to say i had to start over.


          sold off some of the pre 00 ones i had to guy collecting metal.
          Last edited by geldartb; 09-14-2008, 08:45 PM.
          sigpic
          99 Grand Am GT
          3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
          Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
          1357 cam 227 233 .050 dur           515 515 lift 112 lsa
          15.232@88.85mph on stock 3400---New time to come

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          • #6
            It's not the EGR routing? well i'll be... thanks... I could have sworn my only problem was the fucking EGR tube!

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            • #7
              well its partially the EGR routing but if you look inside that indent is transformed into a shelf on the pre 00 ones and if you look inside on the 00+ its basically a straight shot no obstruction.

              i thought i had a direct shot into the plenum of both but i cant find it.
              sigpic
              99 Grand Am GT
              3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
              Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
              1357 cam 227 233 .050 dur               515 515 lift 112 lsa
              15.232@88.85mph on stock 3400---New time to come

              Comment

              • #8
                right... i definately noticed the indent. that of course wouldnt be a hinderance to it's ability to be a "direct" bolt on... i was just pointing out the EGR thing...

                I also like how the exhaust gases come through the bottom rather than the side, and I also noticed that the old UI had NO notch for IAC, where-as this new one has the notch there...

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                • #9
                  Some TB's didn't have a notch, so they notched the intake. I ran into that issue when I was using a 3400 TB on my 3500 TB adapter. I had to notch the TB. However my 3100 TB had a notch so it was good to go. Who knows why they changed stuff like that around. Perhaps less TB whistle by having the intake notched over the TB? Since the notch in the intake probably goes back deeper and less likely to create a whistle by having notch in the TB and then it blocked off by the intake.
                  sigpic New 2010 project (click image)
                  1994 3100 BERETTA. 200,000+ miles
                   16.0 1/4 mile when stock. Now ???
                  Original L82 Longblock                   with LA1, LX9, LX5 parts
                  Manifold-back 2.5" SS Mandrel Exhaust. Hardware is SS too.

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                  • #10
                    i ran into the notch when i was swapping throttle bodies on the grand am. stock form from 99 it had the notch but the spare t-body i had didnt have the notch but had the plenum notched out.

                    gm did some wierd shit over the years.
                    sigpic
                    99 Grand Am GT
                    3400/3500 -Solid trans mount--TCE 65mm T-body---85mm LS2 maf---1 1/4' TCE intake spacers with 3400 upper--SLP Catback with flowmaster 80--TOG headers
                    Modded 3400 lifters with LT1 springs---Comp Cams 26986 Springs
                    1357 cam 227 233 .050 dur                     515 515 lift 112 lsa
                    15.232@88.85mph on stock 3400---New time to come

                    Comment

                    • #11
                      i wish i could add more fuel. no way to tune.

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