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Thread: 4.8 Turbo Sizing

  1. #11
    Join Date
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    Oh ok thanks r.barn
    1951 3100
    1984 C10

  2. #12
    Join Date
    Oct 2008
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    Houston
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    Quote Originally Posted by duckysbht View Post
    Oh ok thanks r.barn
    If your really interested in learning whats going on in a turbo
    system I highly recommend the following book.

    Amazon.com: Maximum Boost: Designing, Testing, and Installing Turbocharger Systems (Engineering and Performance): Corky Bell: Books
    2002 Tahoe 4.8 - soon to be turbo'd - SOLD
    1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
    2012 Raptor - 497rwhp at 10psi
    If you aint breaking - you aint going fast enough

  3. #13
    Join Date
    Nov 2007
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    rearmounts do work but i wouldnt do one for a true daily driver. the location of air filter is horrible, one thing i like is stealthy
    2002 Lightning - GT headed 5.5Litre w/ Twin 7665s
    2002 Silverado - 427Lsx w/ Twin gt4202s
    2010 Silverado crewcab Z71 - 5.3litre w/ procharger
    2000 Wrangler - 5.3litre with some stance
    2014 Xsport- 3.5 Eco boost
    412 Motorsports

    it ain't that I'm too big to listen to the rumors, It's just that I'm too damn big to pay attention to 'em..That's the difference

  4. #14
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    Dec 2008
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    Kentucky
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    Ok as for the oiling system I was thinking of a system where NONE of the engine oil runs throught the turbo...but on its own oiling system with an electric pump and cooler....

    may I ask why rear mount turbos are so bad??? I though alot of you ran them. Its not that I'm trying to be cheap, but I would like to spend a lil here a lil there untill it is done....than install the system on my truck.
    I know rear mount turbos cant be THAT bad or STS would have been outa buisness along time ago. I know theres a lot of pros and cons to BOTH systems

    thanks for the sizes this will kinda give me an idea on how to do this...

    Thanks for the head up on that book...I'll have to order it after christmas...

    BTW I'm not trying to open a can-o-worms...I'm just trying build my first turbo system and maybe learn a little bit in the process. I kinda need a lil guidance...lol
    2001 GMC Sierra 4.8
    lowerd 2in in rear
    custom cat-back
    and the ever so mighty K&N

    -"Faster, Faster until the thrill of speed overcomes the fear of death."

    -Load it like a Freight Car
    -Polish it like a Show car
    -Drive it like a NASCAR

  5. #15
    Join Date
    Feb 2007
    Location
    Spring, Texas
    Posts
    1,739
    It's more just personal preference. Rear mounts work fine and are still capable of making a lot of power. The main argument will be lag and efficiency between front mount and rear. Front mount, as r.barn said, will get the hotter gas since it's close to the engine and therefore SHOULD reduce lag. Plus, rear mounts have the air filter under the truck instead of in the engine bay. Having a turbo in the engine bay also generates a lot of heat under the hood which can be fixed with a turbo blanket.

    In rear mount applications, you can help keep exhaust hot by wrapping the pipes all the way back to the turbo and put a turbo blanket on.

    Like you said, there are a million reasons to go with one over the other and ultimately it comes down to which one you want.

    2004 Silverado Crew Cab, forged iron 5.7, STS w/MP turbo, 10+ psi, FMIC, Tial 50mm BOV, Vic Jr, Snow performance meth, MTI Stealth cam .220/.220 .581/.581 115lsa, Comp chromoly pushrods, Yank TT3000 stall, LS1 Efans, 160 tstat, Trucool 40k trans cooler, 60# injectors, Walbro fuel pump, Patriot springs, Built 4l65E w/billet input & output shafts, Eaton posi, SD tuned...all installed by Klein North Automotive

  6. #16
    casey23 Guest

    This a Pic contest??????

    HEY R.BARN........... Alot of us have Cool pics of things we have built in the past ... I am a Die Hard Supercharger Guy myself... And allways made fun of Guys who try and run with us with turbos !!! I have a few Garage shots myself... and My complete motors Dont fit on Girly Engine stands.....

  7. #17
    casey23 Guest
    Quote Originally Posted by Mr.Cornelius View Post
    Ok as for the oiling system I was thinking of a system where NONE of the engine oil runs throught the turbo...but on its own oiling system with an electric pump and cooler....

    may I ask why rear mount turbos are so bad??? I though alot of you ran them. Its not that I'm trying to be cheap, but I would like to spend a lil here a lil there untill it is done....than install the system on my truck.
    I know rear mount turbos cant be THAT bad or STS would have been outa buisness along time ago. I know theres a lot of pros and cons to BOTH systems

    thanks for the sizes this will kinda give me an idea on how to do this...

    Thanks for the head up on that book...I'll have to order it after christmas...

    BTW I'm not trying to open a can-o-worms...I'm just trying build my first turbo system and maybe learn a little bit in the process. I kinda need a lil guidance...lol
    Dont let R.BARN change your mind on anything...... Use the engine oil for the turbo... Rear mounts do have alot of parts.... My own truck has 16 Clamps that are 2-3 different sizes... about 8-10 couplings... You can nickle a dime a kit together in a few weeks for a good price under 2000.00 bucks.. the part that will hurt you will be the Tune ( 400-500) and Injectors 250-350.00 the turbo parts depending on how exotic you get with turbo,wastegate and BOV 600-1200.00?? if you get in any trouble feel free to contact me for a little tech support or links on getting good prices for the best parts........

  8. #18
    Join Date
    Oct 2008
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    Houston
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    807
    Quote Originally Posted by Mr.Cornelius View Post
    I know rear mount turbos cant be THAT bad or STS would have been outa buisness along time ago.
    STS should be out of business for all the crap I've seen about their kits.
    My tuner was a dealer for them, and after almost getting sued the 2nd time,
    dropped the line and designed their own kit.
    Every time I've seen one being installed I was thoroughly unimpressed with
    materials used, routing and design. ..... just say'n

    If the truck guys are having good luck with em, then I'm knock'n on wood for you.

    Anyway, back to topic. A 60-70 mm turbo is good size for a 5.0L motor.




    and right back at you Casey

    2002 Tahoe 4.8 - soon to be turbo'd - SOLD
    1989 Mustang - LX Vert - 351W-TT - 2inches of dust covering it
    2012 Raptor - 497rwhp at 10psi
    If you aint breaking - you aint going fast enough

  9. #19
    ff_jeff Guest
    I think if STS were that bad, This would not have been the first time I would have heard about it. They also cater to everyone. Seriously, if you have an exhaust, They can make a kit for you.

  10. #20
    casey23 Guest
    Quote Originally Posted by r.barn View Post
    STS should be out of business for all the crap I've seen about their kits.
    My tuner was a dealer for them, and after almost getting sued the 2nd time,
    dropped the line and designed their own kit.
    Every time I've seen one being installed I was thoroughly unimpressed with
    materials used, routing and design. ..... just say'n

    If the truck guys are having good luck with em, then I'm knock'n on wood for you.

    Anyway, back to topic. A 60-70 mm turbo is good size for a 5.0L motor.




    and right back at you Casey

    I Know your possibly the Smartest guy on here man........ But did you see or even read the part where he said he wanted to BUILD HIS OWN !!! Your the one smashing Rear mounts yada yada... After a better look at your pics if i didnt know better that motor on the stand has a Blow Threw Carb... Speaking of a ****ED UP design....... I want to see the part in that book that talks about what a POS a Blown threw twin turbo setup is in a street car...

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