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Thread: New engine is in

  1. #1
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    Well, the 6.7L engine now resides where the LS1 was, get that, one full liter larger! Thanks to Billy at TRT for all the help and Allen for the updated tune! I am waiting for the home-built headers to get coated so that I can complete the installation. Hopefully I will be picking the headers up Tuesday night so that I can fire this monster up. The install went without issue other than forgetting to put the transmission location dowels in while the engine was on the stand(ended up tapping them in with the engine in the truck and the transmission wiggled out of the way). All the standard fbody accessories bolted right on. The alternator now bolts in with only two bolts on the face mount and one on the rear. The 6.0L block had to be tapped for the lower bolt hole (the engine builder did that). There isn't material on the block to tap for the third hole location. Things needed when buying a new block.... coolant passage plugs, dog-bone plug that goes in the rear end of the engine behind the rear cover(supplied with engine), front and rear covers, cam chain, cam sprocket, crank sprocket, oil pump, camshaft, engine to transmission alignment dowels and head location dowels.

    Things I bought...
    -------------------
    408ci engine (high compression). Bought from TRTTurbo.com
    Eagle 4" crank and H-beam rods
    Wiseco forged pistons and Hellfire rings (-8.5cc dome)
    Coated rod bearings
    Steel backed crankshaft bearings
    line honed, decked and bored to 4.030"
    cam bearings
    ARP crankshaft stud kit 234-5608
    --------------------
    ARP main studs kit 234-4317 (2004+ LQ4/LQ9). Bought from SummitRacing.com at SDPC2000.com price match
    --------------------
    Comp cams 54-448-11 cam. Bought from SpeedEngineering.com
    XER287HR-12
    .605/.609
    238/240 duration at .050
    112LSA
    --------------------
    Comp Cams stock replacement lifters pn 850-16. Bought from SpeedEngineering.com
    --------------------
    Drilled .500 oil drain holes in the lifter retainers to bleed the oil out instead of puddling in the retainers.
    --------------------
    Thunder Racing 7.400 hardened pushrods
    --------------------
    Patriot Performance Heads. Bought from TRTTurbo.com
    2.08 intakes / 1.60 exhaust
    64cc
    air flow numbers...
    lift intake exhuast
    .10 78.9 63.2
    .20 150.5 123.5
    .30 212.9 165.9
    .40 261.0 195.1
    .50 296.3 216.2
    .55 307.4 220.0
    .60 311.3 222.2
    Dual springs w/titanium retainers good to .650 lift
    ----------------------
    Stock LQ9 oil pump with LS2 pressure regulator spring. Local dealer... Huffineschevy.com
    ----------------------
    reused the almost new LS2 timing chain setup. Bought from SDPC2000.com
    ----------------------
    reused all the stock covers, oil pan and pickups
    ----------------------
    Stock gaskets from LS1 except I bought LQ9 head gaskets to go with the 4.03" bore. Local dealer... HuffinesChevy.com
    ----------------------
    Of course, a new crankshaft bolt. Local dealer... HuffinesChevy.com

    For now I am running the stock 98 throttle body and injectors and hope to move up to something bigger ASAP.

    To tighten the crank bolt I torqued it to spec and then the addition 140 degrees of torque was done by running a chain through the crank pulley and bolting the ends to holes in the block. Next a cheater pipe was added to my breaker bar and the 140 degrees of torque came easily.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  2. #2
    Join Date
    Mar 2003
    Location
    San Marcos Texas
    Posts
    4,393
    Nice! I want to go see it run at the track next time!
    2006 Superior Blue Trailblazer SS AWD, Stock as a rock

    Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).

    Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning

  3. #3
    Join Date
    Oct 2005
    Location
    Baton Rouge, LA
    Posts
    997
    Yowza!
    Test-n-Tune (Nov 23, 2008) - 13.65s @ 98mph

  4. #4
    Join Date
    Sep 2005
    Location
    Austin Tx.
    Posts
    13,138
    that thing is going to be infreakingsane
    1951 3100
    1984 C10

  5. #5
    Join Date
    Jun 2005
    Location
    Round Rock
    Posts
    1,517
    Just like a kid in a candy store after the candy is in the bag...... "Can we eat it NOW????"
    08 HHR SS
    Black on Black 5 spd with no options


    Pics of Christine, the '05 VHO My Car Domain Site

  6. #6
    Join Date
    Aug 2005
    Posts
    383
    Sounds like fun. Can't wait to hear how she runs.

    03 Chevy ECSB, Z71, 6.0L(LQ4), Maggie @ 9PSI, 4l80E, PI Vig 2800, Detroit True-Trac, 4.10, 90mm LS2 TB, Meth Injection, HSW Dry N20, LPE GT7 Cam, 918 springs, Dynatech LT's, Hi Flow cats, custom stainless exhaust, DMH cutouts, DJM Suspension Drop, E-Fans, AirAid, HPT 2Bar SD Tuned, 11.68 @ 114.2

  7. #7
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    <div class='quotetop'>QUOTE(1BADC10 &#064; Oct 8 2006, 05&#58;09 PM) [snapback]68405[/snapback]</div>
    Yowza&#33;
    [/b]
    That&#39;s what I say every time I see your sweet little asian hottie avatar.


    Would a 6.687 be considered a 6.6 or a 6.7 liter engine?
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

  8. #8
    Join Date
    May 2006
    Location
    Waco TX
    Posts
    3,113
    DANIEL CAMMED SS 13.46 @ 98.17-- 8.58 @ 80.31

    2003 Silverado SS / LQ9 6.0L / Wheatley 93 Octane Tune / 224/228 .581 .588 110lsa / Patriot Gold Dual Springs / Comp Hardened Push Rods / Circle D 3800 stall / Pacesetter LT's / 4:10 Gears / Transgo HD-2 Shift Kit / K & N Cold Air Intake / Corvette Servo / Aeroforce Interceptor / Autometer Narrorband(Wideband on the way) / Mobile 1 Synthetic / Single Chamber Flows with X Pipe / Cats Delete with Cutouts


  9. #9
    Join Date
    Nov 2005
    Location
    ohio
    Posts
    1,712
    6.7&#33;&#33; round up RED. Awesome work man, That is just awesome to have a 408 under the hood&#33; HELL YEAH&#33;&#33;&#33;
    07 SILVERADO CLASSIC 2500 HD 4x4 CREW CAB LT3 DURAMAX LBZ/ALLISON 6 SPEED 5'' MBRP Turbo back exhaust 6'' TIP /NO CAT- NO MUFF/ AFE Intake/ EDGE HOT JUICE /MERCHANT AUTO STG III Built Allison/P I ConverterTTS Twin Lift Pumps. Tierod sleeves/Cognito braces.17x9 Moto metals_______ Old Truck ,04 Z-71/Turbocharged,/cam/stall/Zippy Built TRANS/Nelson Tuned------

  10. #10
    Join Date
    Nov 2003
    Location
    Denton Texas
    Posts
    20,540
    It just looks like a stock engine from the outside. I&#39;d crawl inside and show you what it looks like but it&#39;s pretty dark in there.
    See my truck data in the "My Garage" section here... http://www.ls1truck.com/forums/my-ga...tml#post191709

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