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Rear Turbos... I know, but it was coming anyway :)

This is a discussion on Rear Turbos... I know, but it was coming anyway :) within the Forced Induction forums, part of the LSx Technical Help Section category; Hi to all,does anyone have any experience with the STS rear turbo systems?I was considering possibly getting one.Would it be ...

  1. #101
    Junior Member
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    Black
    99 Trans Am

    Hi to all,does anyone have any experience with the STS rear turbo systems?I was considering possibly getting one.Would it be a good idea?Thanks.

  2. #102
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    Red :(
    1998 Formula

    Have you seen the intercooler setup here?
    http://www.airpowersystems.com/ls1/turbo/turbo.htm
    maybe they gave or can make a single turbo intercooler for you. I am about to start getting my parts for my twin remote mount setup myself and come across this in search of an intercooler. Good luck with your system.

    Sent from my Galaxy S2 (ET4G) using Tapatalk 2

  3. #103
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    Black
    99 Trans Am

    Thanks for the info SUP3R5TOCK.I had a look and it looks good.I am trying to get more info,thanks again,BR427.

  4. #104
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    Red :(
    1998 Formula

    No problem, keep us updated on the project I'd like to see how it goes.

    Sent from my Galaxy S2 (E4GT) using Tapatalk 2.

  5. #105
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    ug... the army sometimes can really cut into your car time lol been busy training and whatnot. still looking for a a T76 turbo though

  6. #106
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    well i bought myself a turbo finaly.
    Got myself an ON3 T76 .81 AR journal bearing turbo on the way.

  7. #107
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    well got a few items on order
    On3 T76 .81 are turbo
    tilton oi pump with an oil coolers (got it cheap so what the hey)
    4 and 10 an fittings coming 90s and straights
    10ft of 4AN stainless braided lines
    12ft of 10an stainless braided lines
    ls1 oil cap with 10an male built into it
    some couplers
    4",3.5", and 3" tbolt clamps
    check valve with 4an male ends
    taped engine oil block off and a 4an fitting for it
    hose barb for wastegate boost reference
    a turbo trans am PCV check valve (thought id try that for the PCV section)
    T4 flange

  8. #108
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    heres my new On3 Turbo for my build
    installed my -4an oil feed flange with built in .08 restictor. bolted right on no prob.
    P1040080.jpg
    P1040082.jpg
    P1040083.jpg
    P1040085.jpg
    P1040086.jpg
    P1040093.jpg
    Smittro likes this.

  9. #109
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    and heres the difference between the T70 t3/t4 .81ar and my new ON3 T76 t4 .81ar turbo.
    the T70 internaly is dramatically smaller compared to the T76 lol
    P1040128.jpg
    P1040130.jpg
    P1040129.jpg
    Smittro likes this.

  10. #110
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    and some more stuff i got.
    Got my feed side ready for lines! oem engine feed flange taped and ready to go, 4an summit check valve, and turbo feed flange all ready to go
    got almost all my return stuff here. waiting on the pump and cooler and of course lines but heres some eye candy for yall
    P1040138.jpg
    P1040139.jpg

  11. #111
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    and got my Lines in the mail today too, so close to build time i can taste it! lol

  12. #112
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    well, while waiting around and for payday lol decieded to finally install my catch can
    cant post pics for some season, but i will as soon as i can

  13. #113
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    well while waiting to pack up my house and move back tot he states now (army stuff) ive been wondering about a few things.
    one is im wondering about heads.
    im trying to keep my car running near stock while i wait to get my car boosted.
    ive heard about goign 317 heads, but hear both pros and cons about using these on boosted engines. how bad will the car "bog" when not in boost?
    im considering either the 243/799 heads or the 317s. keeping budget down for other things. im really looking at the 243/799 heads as it will give me a 15ish hp gain from what i keep reading, and it flows better. polish and porting im sure would net more.

  14. #114
    Senior Member JoshuaGrooms83's Avatar
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    welp, my car gets shipped tomorrow, wont see my red baby for at least a month all my parts are moving as well. just seems like these things take FOREVER to get done when you have a life lol
    at least ill be back int he states where everything cost cheaper to ship

  15. #115
    Senior Member JoshuaGrooms83's Avatar
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    Red
    98 Trans Am

    in for an update i suppose
    Got my car safe and sound for germany, thank god lol the fuel pump really didnt like sitting in a tank of less then 1/4 tank for 3 months was SCREAMING the whole way home from dallas to el paso lol hence i replaced it imediatly when i got home lol
    heres her home on new rims best look so far for me


    got a few more items pieced together. getting very close to be able to install it.
    Thus far
    T76 turbo .96 ar (ON3 sent me the wrong one but they are going to swap it for me once they get .81s in stock lol
    Fuel system
    60lbs injectors
    Racetornics pump and wire harness installed already really easy... trap doored it lol
    aeromotive boost referenced FPR and hard line return to the stock return port in the back of the car




    oil system
    sput gear oil scavnage pump
    4an feed
    summit chack valve,
    10an return
    4psi hobbstitch normally open with piezo buzzer for "just incase"
    returning to oil pan... decided to not put it in oil fill cap. just in case again
    LS6 oil pump


    cold side
    2.5" pipeing
    31x13x3 EMUSA intercooler
    EMUSA 50mm BOV
    gm 85mm MAF with IAT sensor
    5 to 3 wire harness adaptor with IAT plug
    2 Bar GM MAP sensor


    Hotside
    T4 inlet
    44mm Vband wastegate
    3"in/3"out OBX bullet muffer
    exhaust wrap

    Interior
    Glowshift 3 gauge a pillar pod
    glowshift vac/boost guage
    glowshift or innovate wideband
    glowshift fuel pressure guage

    also in my offtime managed to intall some c5 ZR1 17x11 rims with 315s on

    trying to source out a few little items along with a 224 or 228 cam and some 317 heads.

  16. #116
    Senior Member JoshuaGrooms83's Avatar
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    installed 90% of the FPR setup with a return line. i used a 3/8 hardline to return the fuel. cheaper then AN hose.
    mind you its just a preliminary mock up. i still gotta clean it up a bit but its in there pretty good.





    just gotta hook up the adaptor in the back, remove the shrader valve in the rail, and remove the stock FPR in the tank and then just gotta dial in the pressure.

    also was fiddling around with my wastegate while i wait.

    and threaded the turbo with a 4 an fitting


    also got my EMUSA 31" intercooler finally

    Last edited by JoshuaGrooms83; 01-22-2013 at 08:38 PM.

  17. #117
    Senior Member JoshuaGrooms83's Avatar
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    98 Trans Am

    also got a set of 317 head on the way i picked up for reall cheap on ebay. waiting on my turbo inlet pipe and this puppy can get started to be installed

  18. #118
    Moderator 35th-ANV-SS's Avatar
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    02 35th LE Camaro SS

    Nice update and progress. In for the next batch of pics and updates.

  19. #119
    Senior Member JoshuaGrooms83's Avatar
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    thanks, yeah its definitly been a work in progress lol baby steps lol
    biggest thing is that im waiting on that inlet turbo pipe i had made for me. should be here anyway now.

    i am wishing i went with nylon braid feed and drain lines but of well. i put together my wastegate reference line with 4an fitting and 4 an nylon braided hose and was SOOOOOO much easier then the steel braided line lol those are a bitch and i still gotta do a bunch on them.

    had an interesting idea though that i need some input on. got to thinking of the return line and was wondering if a short 1ft 12an line right off the turbo and then back to 10 an into the scavenger pump will act as a mini sump to help return oil when under high load better. any thoughts?

  20. #120
    Moderator 35th-ANV-SS's Avatar
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    Let me think about that some and I'll post my thoughts tomorrow evening sometime.

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