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  • 80mm throttle body?

    Hi, I was reading the tech and I see the 3.8 v6 has a huge throttle body 63mm! I was searching around and I found a 80mm throttle body. I am a little skeptical...Is that even worth it...or is just a crap [img]graemlins/bs.gif[/img] Well, if you have any suggestions get back to me thanks. [img]tongue.gif[/img]
    My 1996 Camaro RS <a href=\"http://www.cardomain.com/id/mustangkiller311\" target=\"_blank\">www.cardomain.com/id/mustangkiller311</a> \"Its out-dated\"<br />Mods=SLP CAI, 3.42/LSD, 180*, BMR StrutBrace,SLP Take-Off Shocks/Springs, Z28Swaybar, DynomaxSuperTurbo,3in pipes,Catco3in,3in Cutout ThrottleBody Spacer, SolidDriveShaft,NGKplugs, Taylor8mmWires,ZR1 rims, RS Spoiler,WhiteFacedGuages.<br />Stereo= Pioneer DEH-P8400MP, Custom Subthump enclosure, 2 BlouPunkt 12\'s, JL 500/1, Fosgate speakers, 1FaradCap.<p>NEW 1997 FireBird Formula WS6

  • #2
    well, keep in mind the area of a circle = pi * radius^2

    lt1's have a dual 52mm (i believe) tb, so the total cross-sectional area of this tb is close to
    1682*pi...

    our cars, with a 63mm have a cross sectional area of about 992*pi,
    so in theory the lt1 dual tb will flow nearly 70% better than ours...

    now look at the 80mm, cross sectional area is 1600*pi, a huge difference compared to our weak little 992*pi... and really close to what a lt1 tb would flow...

    Actually the lt1 would only flow 5% better than an 80mm, so you should get a HUGE improvement

    now looking at all of this, let's hope that TB wasn't for a grand-national... :(

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    • #3
      You would really want to flow test those before making that jump. You probably don't need that large a piece. There were a couple of posts awhile ago concerning larger TB's. Going to an extreme like that is not always good for performance.

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      • #4
        Our cars flow 350-400cfm maximum, there is no exception unless you plan on going above 6500RPM (eek).

        Our current throttlebodies are seriously oversized as-is, you would gain nothing from getting a larger one - sorry.
        2002 5-spd NBM Camaro
        Details: www.1lev6.com

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        • #5
          TB flowchart

          throttlebodys only flow as much as the engine can intake
          so if at wot you motor only sucks 400cfm, a tb that flows 650 cfm wont make a difference,the motor will still only pull 400 cfm

          63 mm is a huge tb for a v6

          [ June 12, 2002: Message edited by: wolf ]</p>
          Wolf<br /><a href=\"http://www.cardomain.com/memberpage/249111/7\" target=\"_blank\">95 black t-top camaro</a>,3.4 5 speed,ud pullies,plugs/wires,de-shaft tb & gutted airbox, homemaid short throw shifter

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          • #6
            <blockquote>quote:</font><hr>Originally posted by wolf:
            TB flowchart

            throttlebodys only flow as much as the engine can intake
            so if at wot you motor only sucks 400cfm, a tb that flows 650 cfm wont make a difference,the motor will still only pull 400 cfm

            63 mm is a huge tb for a v6

            [ June 12, 2002: Message edited by: wolf ]
            <hr></blockquote>

            Our TB is 68mm, and that is a VERY helpful link. I really appreciate you finding that, thats something I believe we've all been looking for!
            2002 5-spd NBM Camaro
            Details: www.1lev6.com

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