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Thread: time to upgrade the 6.0 one last time

  1. #1
    Join Date
    Nov 2011
    Location
    NH
    Posts
    109

    time to upgrade the 6.0 one last time

    i got a 99 6.0 with iron heads.. think i am gonna swap to a 243/799 head from what ive read on here. what size cam do you guys recomend going to?? i plan on buying a stall converter and did the 4l80e swap already. also heard alot about nnbs/tbss intake upgrade. what do you guys think i should run top end to give it some more get up and go. and what converter stall to match. i would like to hit 450 maybe 500 hp on the motor. and have a agressive idle.

    i got a good deal on a comp 550 ish lift cam and a monster trans converter but it just doesnt cut it. glad i dont have much invested!!

    let me know what you guys thing and any other things i should so as welll!

  2. #2
    Join Date
    Sep 2008
    Location
    Arizona/Utah
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    3,955
    As far as stock casting heads those have good flow. The nnbs intake swap is great with a 90 mm TB. Cam and stall choice go hand in hand. A good combo might be 231/236 with healthy lift and a 3600ish triple disk stall. You will get some big results.
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

    waiting to go in... 3.90s, 214/220cam

  3. #3
    Join Date
    Aug 2004
    Location
    Magnolia, TX
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    3,273
    Platform of truck?

  4. #4
    Join Date
    Nov 2011
    Location
    NH
    Posts
    109
    i got a 99 reg cab short bed 4x4. 6.0 swap and 4l80e swap. 410 gears. daily driver. want to really wake thethin up. it goes decent now but could use more. figured top end and cam is where to start. ive heard alo about the nnbs intakes what do they come stock on???

  5. #5
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    7,112
    The NNBS intakes come stock on NNBS's. You can get them brand new from Rock Auto for $99+shipping. Cam in the low 230s.
    2006 Silverado
    Little Black Bitch

  6. #6
    Join Date
    Nov 2011
    Location
    NH
    Posts
    109
    awesome and what throttle body do you guys run on it? any 90 mm? whats the difference between the nbs and nnbs???

  7. #7
    Join Date
    Aug 2007
    Location
    Honeywood, Ontario
    Posts
    7,112
    Stock throttle body on DBW trucks, holley edelbrock,fast,nic williams all make 90s for the dbc trucks.

    Difference between NBS and NNBS. NBS=99-06, 07Classic trucks. NNBS=07-current trucks.
    2006 Silverado
    Little Black Bitch

  8. #8
    Join Date
    Nov 2007
    Location
    THE MEAN STREETS OF OKLAHOMA
    Posts
    11,284
    my new setup is a 6.0 l92 heads 230s cam 630s lift, single plane intake 90mm TB and 3600 stall, should do good. Id say to wait and see but its gonna be awhile
    THEY CALL ME G.

    AZRAEL
    01 GMC REG CAB BUILDING
    06 SILVERADO SS 80E 3200 YANK LS3 TOP, DD
    2013 POLARIS RANGER CREW LE EPS

    The difference between winning and losing, is having a 2nd stage.
    Quote Originally Posted by A PATRIOT View Post
    "MOLON LABE"

  9. #9
    Join Date
    Nov 2011
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    NH
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    109
    whats the l92 head?? and the difference between that and a 243/799???

  10. #10
    Join Date
    May 2008
    Location
    Crowder, OK
    Posts
    8,064
    Its the head that comes on NNBS 6.0 and 6.2 motors. It has the best flow rates of any LS head. Requires a 4" bore

    1969 Chevy RCLB C10 350/TH400 SOLD
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    2008 Chevy RCSB 5.3 4x4 LT SOLD
    2010 Chevy CCSB 6.2 4x4 LT SOLD
    2005 GMC CCLB DRW 6.6 Duramax 4x4 191,000 and counting
    2013 FORD CCSB F350 6.7 Powerstroke 4x4


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