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Performance, Brainstorming & Tuning Talk about modifications, or anything else associated with performance enhancements. Have a new idea for performance/reliability? Post it here. No idea is stupid! (please use Detailing and Appearance for cosmetic ideas)

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Old 08-02-2007, 04:37 PM   #11
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A higher stall converter can make a world of difference in an N/A car (say 4000 stall) even with a stock cam. Your larger tires have more rotating mass on the outside of the tire then smaller rims do. Think of it as spinning a marble at the end of string in a circular motion, A small tight circle is easy to keep going while a larger circle has more of a mass feel to at the end.
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Old 08-02-2007, 05:28 PM   #12
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Wow thanks guys! When you put it that way it all make sense. I'll definitly look into the torque converter.
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Old 08-02-2007, 06:42 PM   #13
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So we are clear, you're not really gaining any power through a torque converter, but changing what part of the power band your vehicle wants to start moving(I suppose you might gain some drivetrain efficiency as well, but I don't know for certain). Stall speed is related to input torque from the engine, and the mass of the vehicle. Keep that in mind when ordering, and future modding. Also, as a drawback to the higher stall, your fuel mileage stoplight to stoplight will suffer some(I do not know how much). It won't be noticed on the highway though, so long as it maintains the lockup feature.

*edit* Reworded some stuff and wanted to add.

Another thing you may question is, if you get a 4000 stall torque converter, will you have to bring your revs up to 4000 to actually get the car to move. The answer to that is in the little snippit about input torque. At least, that'* stood true to the cars I've known to get a high stall converter.
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