How does the stall work out in our cars on daily driver say 340-400 rwhp cruising at 50-60 mhp 410 gears would be around 2000 rpm or so . will lock up keep heat building "slippage in check ?
My car makes 410rwhp, and I take it on two hour trips without a second thought.
In a nutshell, you are right. Once the torque converter locks up, the car drives totally like stock. There is no slip once it is locked up.
When accelerating, you can feel the extra slip some, but once you are at highway speeds, the car will drive tame as a kitten. Normally, when accelerating from a stop, my rpms will go to about 3000 and hold for a second, then shift to 2nd gear, rev up to about 3000 gradually, then the torque converter locks up and they drop to 2200 or so. Once you get up to speed, the converter will unlock, shift to 3rd, then lock back very quickly. I don't really even feel it. You can keep the revs down to 2000-2500 or so if you are light on the throttle. I normally just go ahead and dig into it to get up to speed though. Your tuner will take car of all the shift points for you.
Pretty much from 2nd gear up it drives like a stock car at part throttle. Then at WOT, the car is a freaking animal. PD blower and turbo guys might not notice this as much because they have pretty much instant torque anyway, but with a centrifugal blower the difference was night and day.
I've done it all to my car at one time or another: gears, every bolt on imaginable, cams, a blower, etc. The only mod that even comes close to the torque converter in seat-of-the-pants performance is the blower. I think the whole "torque converters will ruin drivability" stereotype was started quite some time ago, and technology has really came a long way into making these things more tame on the street, but mean on the strip. If more people stalled their autos, they wouldn't have such a bad rap for being boring... it's kind of hard for someone to talk smack about your transmission when their neck is being whipped back at a 45* angle.