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Thread: 5.3 lm7 turbo build

  1. #11
    Join Date
    Dec 2007
    Location
    Ponca City
    Posts
    1,606
    Do whatever your budget allows.... Better flowing intake system will help yes. TU or isky cams are a good way to go. You need to do some searching. There's dozens and dozens of builds like yours on this forum alone.
    Slowest in Oklahoma...

  2. #12
    Join Date
    Aug 2013
    Location
    virginia
    Posts
    8
    Yea I knw its a commin build thats why im headed that direction just alot of modification work compared to my lil sbc carbed eng.

  3. #13
    Join Date
    Dec 2009
    Location
    DIrty south AZ
    Posts
    1,020
    im going to be running a gt 45, 76mm turbo with a 1.15 A/R on my lm7. i have heads, tr 220 cam, walbro 400 fuel pump with the hot wire kit, 80lb injectors, and a 4l80e with a multi disk. my builds not super crazy, but should get the job done. i think ull have fun especally since ur alot lighter than me. id deff get a cam speced if you plan on getting one, if you do heads you might as well to the Tbss intake swap as well.
    Built 2 Run! 6XX HP/ 6XX TQ

  4. #14
    Join Date
    Aug 2013
    Location
    virginia
    Posts
    8
    thanks for the input and yes cam and head work is a defanent and i was thinking of going with the holley efi high rise intake dont know if that is a good dession or not but we will see
    88 chevy 350 sbc bored .60 over dyno 330hp all built by my hands very proud now looking for more lololololol

  5. #15
    Join Date
    Dec 2009
    Location
    DIrty south AZ
    Posts
    1,020
    ya ive heard mixed reviews on them myself? i know alot of guys eather run the tbss or the fast intakes
    Built 2 Run! 6XX HP/ 6XX TQ

  6. #16
    Join Date
    Sep 2008
    Location
    Arizona/Utah
    Posts
    3,939
    Fast intake is a no no for boost. The TBSS is possibly the best budget intake around. The high rise in my opinion is most effective for all out builds.
    ECSB 2kSierra 2wd 4.8L-K&N-HPtuners-Calspeed LT's-Magnaflow-Tahoe20's-HankookRH06

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

  7. #17
    Join Date
    Aug 2013
    Location
    virginia
    Posts
    8
    I hear that the high rise just looks so dam good on ls motors just haven't heard much on them and im trying to build a bad street ride plus I want it to look as clean as possible too
    88 chevy 350 sbc bored .60 over dyno 330hp all built by my hands very proud now looking for more lololololol

  8. #18
    Join Date
    Dec 2009
    Location
    DIrty south AZ
    Posts
    1,020
    x 2 on the tbss intake tho alot of guys run them. i would be but i got hooked up with a manifoild with the dude who did my heads. but sounds like your builds going to be alot like mine. ull want a new tranny, rear end, and a good stall to go with it all. if you were to build like my truck " same motor and turbo set up" ur looking at 13k or so for it to be done on a budget. thats with heads, cam, fuel, tranny, converter, rear end, turbo set up, and gauges.
    heres my bill
    cam- $900
    tune- $400
    heads- $800
    turbo kit- $4700
    gauges- $ 850
    tranny- $ 1100
    stall-$1100
    rear end- 1200
    fuel- $750
    and im sure $1000 spend on mic, and stupid crap.
    Last edited by darnie1987; 09-11-2013 at 06:09 AM.
    Built 2 Run! 6XX HP/ 6XX TQ

  9. #19
    Join Date
    Mar 2013
    Location
    Edmonton, AB, Canada
    Posts
    133
    Can back you up on the pricing there my friend. Spent 12K on mine. ~520Hp and 630ft*lb on 13.5psi T72 turbo. Had 130000km on the engine-looked good but blew a hole in piston 7 on the dyno on the last pull. So now going to a 5.3 bored to 5.7 with forged pistons and crank with 243 heads for more boost and reliability.

    Stk rear end though
    Back Alley Motorsports 98 GMC
    -5.3l LM7 bored to 5.7l Thompson Motorsports -72mm T4 Magnum Turbo
    -TU1 Custom Grind cam(spec speed.inc) -799 heads
    -.660" Trick Flow dual valve springs -Forged Probe Pistons 3.902" flat top

  10. #20
    Join Date
    Mar 2003
    Location
    San Antonio, TX
    Posts
    11,038
    ya'll should have just pushed 25psi thru a stock 4.8L and make 1200hp all day.
    jk

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