1. Post #1
    brians bad's Avatar
    October 2011
    60 Posts
    i have a 200 pontiac grand prix. it is supercharged, i want to add a turbo to it bu i heard that having both a turbo and supercharger on your car is very hard on the engine. is this true? (V6 3.8 litre series two engine)

    Edited:

    2000 lol my bad

  2. Post #2
    Gold Member
    Del91's Avatar
    October 2010
    9,933 Posts
    Do it.

  3. Post #3
    Gold Member
    Strike 86's Avatar
    July 2005
    699 Posts
    Those engines make about 200hp stock which is pretty laughable for a supercharged 3.8, so I would say turbocharging it would be an expensive and unproductive way of getting more power - and I don't think the interals would last long without forged pistons and general reinforcements. Upping the final compression ratio with forced induction is generally bad for an unmodified engine.
    I'd say there's a probably at least 100 horsepower to be had by some relatively simple things like a more free-flowing exhaust, de-cat, air filter and a good ol' ECU remap.

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  4. Post #4
    Fuck Your Life
    Dennab
    July 2011
    2,186 Posts
    Buy a new car, cheaper and easier and better in the long run lol

  5. Post #5
    Master Cheese Tactician
    The Decoy's Avatar
    August 2011
    968 Posts
    twin charging costs a lot.
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  6. Post #6
    AidanCKY's Avatar
    September 2010
    446 Posts
    You idiot, its not as simple as you make out that it is. Get a car which makes more power with a smaller engine, you americans genrally have big, sluggish engines in your cars.
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  7. Post #7
    I HAVE A ROTARY BECAUSE ITS GODDAMN AWESOME!
    justin1992's Avatar
    April 2007
    3,146 Posts
    You say that like it's a bad thing :o

    And had, bigger engines are much more efficient these days
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  8. Post #8
    Jewish Paladin's Avatar
    October 2009
    297 Posts
    I don't think you understand the complexities that are involved in forced induction.

    You're not ready for this. Trust me. Also, it's a grand prix -- let it serve it's purpose as a daily driver, don't go out trying to street race it.
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  9. Post #9
    Dennab
    December 2009
    1,739 Posts
    You idiot, its not as simple as you make out that it is. Get a car which makes more power with a smaller engine, you americans genrally have big, sluggish engines in your cars.
    god stupid pigfat mcdonalds americans and their big engines sell your car buy a honda only japan makes good cars god why are you so stupid
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  10. Post #10
    Gold Member
    Second-gear-of-mgear's Avatar
    June 2009
    6,054 Posts
    You idiot, its not as simple as you make out that it is. Get a car which makes more power with a smaller engine, you americans genrally have big, sluggish engines in your cars.
    Explains why most of the the independent European sports car manufacturers use American engines.
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  11. Post #11

    November 2005
    3 Posts
    Supercharged 3.8 makes decent power with some mods. Check out http://www.intense-racing.com/

  12. Post #12
    Gold Member
    TestECull's Avatar
    July 2007
    6,944 Posts
    Get a smaller supercharger pulley. Takes all of ten or fifteen minutes to install and you can get 50-75 free horsepower. The motor can take it, too, that 3800 is nigh indestructible. You may have to have the ECU remapped though, if you run it lean you might melt a piston or something.

    Get a car which makes more power with a smaller engine, you americans genrally have big, sluggish engines in your cars.
    We'll see who has the last laugh when that 3800 Series II is still running flawlessly with 320,000 miles on the clock and your strung out little 1.xL is nearing it's second overhaul. Most American engines, and GM 3800s are leaders in this regard, will outlast the rest of the car. They'll see several gearboxes, outlive the frame of the car, and often get plucked out of that old hulk in the junkyard and continue living their life in another car. Even when they're beat on and abused they just refuse to let go, there's so much overhead in their construction that you have to be intentionally trying to kill them.

    Unless it's a Mopar product. They're kind of flaky. I've owned three and none of them were what I'd call reliable.

    We like our engines to last to the end of time. That's why we build such large displacement engines that don't rev and don't make much power. They'll last forever that way, the stresses on the internals are so low in relation to how heavily built they are that they just don't break. It also means they have quite the reserve sitting around for intrepid gearheads, they can and will make 1HP/Liter and above if you tinker with them. Doesn't take much, for the typical smallblock V8 all you need is a cam, intake, headers, bigger carb/throttle body and injectors, little portwork on the heads, some custom tuning to make everything work properly, and there you are. That 'lazy' old motor is now revving to seven thousand and making more horsepower than it's displacement, and usually on the stock internals.
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  13. Post #13
    Gold Member
    WolvesSoulZ's Avatar
    June 2008
    4,181 Posts
    Those engines make about 200hp stock which is pretty laughable for a supercharged 3.8, so I would say turbocharging it would be an expensive and unproductive way of getting more power - and I don't think the interals would last long without forged pistons and general reinforcements. Upping the final compression ratio with forced induction is generally bad for an unmodified engine.
    I'd say there's a probably at least 100 horsepower to be had by some relatively simple things like a more free-flowing exhaust, de-cat, air filter and a good ol' ECU remap.

    A stock GTP does 240HP/280LBTQ.
    With slightly inexpensive mods, IE, a Stage 1 kit, being a 3.5" pulley, 180Degree T-stat, CAI, colder sparks, and such, you will get a 20-25HP gain, now tell me this is laughable for a stock car, with about 200-300$ of mods put into.

    And with just those mods you listed, you won't get 100 hp at all, with a free-flow exhaust system, you'll get at max, 5-15hp on those. The most restrictive part is the U-bend, you get rid of that, you're good to go.

    You can pretty much raise the 3800 Serie 2 engine power easily to over 300hp, with just small mods without any much risks to your engine.

    Plus OP, you need to get an Overkilled PCM tune. They're by far the best 3800 pcm tuners.

    The GTP Is a great platform to make beasts car out of it, the 3800 engine being by far one of the best GM engine, with tons of aftermarket mods available for it.
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  14. Post #14
    Gold Member
    Second-gear-of-mgear's Avatar
    June 2009
    6,054 Posts
    Now that's incredibly laughable.

  15. Post #15
    SUPER SWELL FELLOW
    Phrozen99's Avatar
    May 2006
    2,340 Posts
    The gtp can be made fast, I had a regal gs, which is the same engine. You can make them fast pretty cheaply. I put a 2.8in pulley, new headers and catback exhaust, intake, pcm program, and I had about 350 hp. It ran about a high 12s to low 13s in a quarter mile.

    Check http://www.3800performance.com/ They have good shit.

    Dont twin charge it, it is extremely expensive and not worth the power gain on this engine.
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