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2002 Turbo Tahoe

This is a discussion on 2002 Turbo Tahoe within the Forced Induction forums, part of the LSx Technical Help Section category; Latest project is Turbo Tahoe .... aka ..... " We Just Got Spanked By That ?!?!? " Bone stock 5.3L ...

  1. #1
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    2002 Turbo Tahoe

    Latest project is

    Turbo Tahoe .... aka ..... " We Just Got Spanked By That ?!?!? "

    Bone stock 5.3L Tahoe.
    Turbonetics 62-1 turbo with .81 a/r
    27X12X3 intercooler ..... $100 ebay special
    Built 4L60E - 2WD.



    Real basic build. Stock driver side manifold into 2.5" crossover
    under the trans. up into a 3" log header on passngr side.
    3" downpipe with high flow cat into stock 3" cat back and muffler.

    Run some green top 42lbs injectors and a high pressure 255 Walbro pump
    and use HPTuners VMC suite for the tune running straight SD set-up.

    Going to go ahead and throw 12-13psi at it see what kinda power we
    can get out of this 5,000 lbs grocery getter.

    Trans gets installed this week with new Circle D 3,000 stall converter.

    Some LQ9 coilpacks off ebay to beef up the spark


    Passenger side log header



    Intercooler is mounted.


    40,000 gvw RV trans cooler


    Turbonetics 62-1 turbo

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    Black
    Avalanche Z71

    looking good keep the updates coming.. I was going to do an STS but after everything I've heard I've desided not to.

  3. #3
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    Picked up the built Stg3 4L60E today.




    Quote Originally Posted by daddyzzs View Post
    looking good keep the updates coming.. I was going to do an STS but after everything I've heard I've desided not to.
    Check out Trick Performance.

    Got my log header from him. Keeps full kits in stock
    Good design. Excellent workmanship and customer service.
    Last edited by rbarnes; 10-29-2008 at 01:01 PM.

  5. #5
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    Black
    Avalanche Z71

    thanks Im going to check them out and get my turbo on
    I'll post the build up as I go that's a better price anyday then sts

  6. #6
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    Bone stock 70,000 mile 5.3L baseline dyno pull

    205rwhp and 214rwtq

  7. #7
    Member 01 SS Vert's Avatar
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    Quote Originally Posted by rbarnes View Post
    Bone stock 70,000 mile 5.3L baseline dyno pull

    205rwhp and 214rwtq
    I was expecting a little more than that. What are those stock again?

  8. #8
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    Quote Originally Posted by 01 SS Vert View Post
    I was expecting a little more than that. What are those stock again?
    285-295 at the crank i beleive. seems like its about 10-15hp low. probably just needs a tune up?

  9. #9
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    Tune goes a long way on these engines.
    70,000 mile engine with original plugs and wires and stock paper filter in the air box
    and mechanical clutch fan that I'm sure doesnt help any.

    They are 5.3L engine with heads that flow VERY close to 98-00 LS1 heads.
    Truck cam, intake and tune are just very limiting.

    Computer kept shifting up into OD at 5,100 rpm too.
    Might pull up to 210-215rwhp at 5,300-5,500rpm if we could have kept it in 3rd.
    Last edited by rbarnes; 10-31-2008 at 07:55 AM.

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    . dub post

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    Went by the good ole pick-n-pull and got a Y-pipe to hack up
    leaving my original intact.

    $50 and some knuckle skin got me a spare 3" stock cat-back flange for the downpipe
    and the unfindable funky 3 bolt flange GM decided to use on the driverside
    header for some reason.

    Start some serious fab work on the crossover and downpipe now.
    Got my 44mm Tial wastegate in and all the flex couplers should be here on Monday or Tuesday.



  12. #12
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    Got the flanges cut off and cleaned up.
    Should make tapping into stock exhaust a snap.



    Tail 44mm wastegate with 13psi spring ready to go.
    $100 ebay cold side pipe package got in too. Should be enough.
    Might need 1 or 2 more silicon couplers.

    New trans is being installed today.


    I also plotted out airflows on the 62-1 compressor map.
    Using 323cid, 82% Ve, and 5,200 rpm at 13psi.

    Looks good. Perfect line plotting on the map.
    Spools up and hits max boost right in the center of the map
    and just barely bumps the "choke" line at max rpm.

  13. #13
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    New OEM 05-06 Tahoe e-fan got here today
    Got the swap harness from Nelson last week. Install looks pretty straight forward.

    Should be last supporting mod I can think of to get everything ready
    and make needed room for turbo stuff.


  14. #14
    Member noxside's Avatar
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    Purple 95 Camaro
    Arctic White 02 T/A WS6

    Keep the updates coming!

  15. #15
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    Got last of the hot-side parts in.

    Just waiting on the high flow CAT from Jegs for the downpipe.
    fingers are officially crossed I dont have any emissions test problems





    Got the good expensive flex couplers with the inner flex-pipe lining.
    The cheap-o ones on ebay do not have this.




    Should make some serious progress this weekend.

  16. #16
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    Got the late model Tahoe e-fans in yesterday. Running the wiring
    and cold side from intercooler to TB this morning.

    Start on the hot-side this afternoon probably.

    e-fan took all of 30secs to install. Slipped right into existing tabs
    and bolt holes from the factory. Even had a hole on top of the fan
    in same place for factory radiator hose retaining clip.

    $250 off ebay, brand spank'n new, not used.


  17. #17
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    Cold side from cooler to TB is done. Took about 20mins
    Just need a 4" to 3" coupler for the TB



  18. #18
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    Red+White Top and Stripes
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    Nice build, defiantly unique. Keep up the good work.
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  19. #19
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    Houston, we have turbage ......... LQ9 coilpacks are on too







    Started on DP fabrication

    Last edited by rbarnes; 11-09-2008 at 02:05 PM.

  20. #20
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    Crossover is halfway done, Downpipe is halfway done.

    Plenty of room to route crossover around 4X4 driveshaft if it
    was there too.


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