Thread: 3.4 DOHC Torque Curve

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  1. #1 3.4 DOHC Torque Curve 
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    Anyone have information on Torque curve on these engines? I'm looking at changing gear ratios, i want to make sure I try to optimize torque/hp so I don't under gear (poor performance) or over Gear it(worse gas mileage)
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  2. #2 Re: 3.4 DOHC Torque Curve 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    How are you going to tune it for those changes?

    A good guess would say your powerband is 2500-5000ish rpm an faills off before it shifts. You should just leave it.

    SMGPFC Member #1
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  3. #3 Re: 3.4 DOHC Torque Curve 
    GT Level Member 91gpse's Avatar
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    i would agree with five finger death punch... if you want to mess with gears your better off getting a manual trans. which its not worth it unless you got some serious mods in the engine.
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  4. #4 Re: 3.4 DOHC Torque Curve 
    GXP Level Member ctracer's Avatar
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    since this thread got bumped....these 3.4 dohc engines make good use of the upper powerband.
    a guy on here had 3.69's? i think? and he absolutely loved them with this engine.
    07 Black GXP.
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  5. #5 Re: 3.4 DOHC Torque Curve 
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    3.69? Came with factory 3:43. Wonder how he got to 3:69?
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  6. #6 Re: 3.4 DOHC Torque Curve 
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    U get 3.69 by using a final drive from a 3100 v6 car with a 4t60e. And he also used a 245/45r17 tire and ended up with a ratio of 3.73. The guy I know that has done it is z34phoenix. He is on wbody forum a lot. I also have done the diff swap to 3.69 but my car isn't driving until the snow clears so I don't have any opinion on it

    Sent from my MB886 using Tapatalk
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  7. #7 Re: 3.4 DOHC Torque Curve 
    Florida Tuner Z34Phoenix's Avatar
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    no actually when you install the 3100 final drive you end up with 3.73's using my 245/45-17 tires the final drive would be equivalent to 4.09

    96 Z34 (RIP LQ1 14.81@92.3) L36 Swap 14.9@91.5 www.cardomain.com/id/z34phoenix
    Topswap: P&P All,Si Valves,L76's,LW Pushrods,SD's,DHP PT PB 13.91@99.8
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  8. #8 Re: 3.4 DOHC Torque Curve 
    SE Level Member padgett's Avatar
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    My SPI includes FV0 RATIO, TRANSAXLE FINAL DRIVE 3.67
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  9. #9 Re: 3.4 DOHC Torque Curve 
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    3:69? Wow, and I thought I loved the 3:43. Reprogramissues?
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  10. #10 Re: 3.4 DOHC Torque Curve 
    Florida Tuner Z34Phoenix's Avatar
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    Just used a DHP power tuner and then remapped the shift points. Needed a special release of the dhp software. The latest release doesn't have the settings needed for the 96 z34
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