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571 dyno run

This is a discussion on 571 dyno run within the Classic Muscle forums, part of the Vehicle Specific category; This is a 571 my father had built last year for his GTO. Built by BES Racing, winner of several ...

  1. #1
    Moderator Firebirdjones's Avatar
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    571 dyno run

    This is a 571 my father had built last year for his GTO. Built by BES Racing, winner of several EMC's including the most recent one.
    This is a very mild pump gas engine, with alot of BES tricks inside. Built with torque in mind and a somewhat low RPM to make peak HP, to make it more pleasurable to drive since this is a 100% street car. This was dyno'd with the chassis headers as installed in the car, along with mufflers and a very stingy dyno for a little more realistic dyno number. No fancy dyno headers and exagerated numbers.

    https://www.youtube.com/watch?featur...&v=5WswK-m-zIA

    Installed in the car and running for the first time



    Dyno sheet comparison between 1200 dominator and 950HP
    Last edited by Firebirdjones; 02-11-2015 at 03:51 PM.

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    Veteran 0rion's Avatar
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    98 Formula
    06 duramax

    that thing is bad ass......he's gonna ruin someone's day if they decide to try and run the "old man".

  3. #3
    Moderator Firebirdjones's Avatar
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    I think that was his goal He's costing me money now, lol.

    I have a 502 and procharger in the works.

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    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    Awesome!!

    But where's the pics of the rest of the car?

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    Senior Member Naaman's Avatar
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    Cayanne
    98 Z28 Vert M6

    Quote Originally Posted by SMWS6TA View Post
    Awesome!!

    But where's the pics of the rest of the car?
    ^^This....
    Lid, Throttle Body, LS6 Intake, Heads, Cam, Magnaflow, LS7 Clutch, SFCs, STB, Panhard Bar, Strano Springs, Hollow Sway Bars, Poly/Roto LCAs, Konis, MGW Shifter

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    Black & Blue
    '02 WS.6 / '07 Suburban

    Super clean build and install! Screw Tucson, we're coming north next trip out.

  7. #7
    Moderator Firebirdjones's Avatar
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    I've posted pics of this car in the past for other subjects.

    Here's a shot of it at Norwalk several years back. This is with the old 455 pump gas engine I built for it.

    - - - Updated - - -

    Here's a recent shot of the car with the new hood installed to clear the new engine.

  8. #8
    Moderator Firebirdjones's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Super clean build and install! Screw Tucson, we're coming north next trip out.
    Ha, it'll be here in my shop by then. Parents are in the early process of moving as we speak. Already made one trip out with the trailer, coming back for the rest.
    Going to tear it down for him and give it a fresh paint job, send the converter out for a restall, and build a 9" for the new engine since we don't think it's a good idea to abuse the 12 bolt currently in it, even though it's held up for a dozen years of dragstrip abuse. Figured it's a good time to take some rear gear out of it as well. It doesn't need 3.73's anymore with the torque curve this thing has.

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