I have a 383 stroker bored .30 over. It has a 11:1 compression and a holley 600 4 barrel. The manifold is a weiand dual open plane. I have an automatic with no computer and the torque converter remains unlock. The power of the motor doesn't kick in until about 3,000 rpms or so. So what can i do to get it to kick in at the lower rpm band. Also what is the function of the torque converter? forgot to add that the cam has .515 lift and the heads are edelbrock 2.02 1.60

 

i'd run more carb, change your crank gear to advanve your timing 4*, will give you more torque (instructions are on the chain gear set box)

 

Lower the compression, run less cam, if the intake is an open plenum get a divided one; your carb is already too small so that should help.

Anything you do with the cam to lower the RPM band is going to cause fuel issues with that much compression. It's simply too much for a street engine.

THe torque converter is the thing that goes between the engine and the transmission. It's what allows the car to idle in gear. No doubt you have noticed that with the car sitting still you can make the engine RPM go only just so high, at which point it feels like the engine is fully loaded; that's called the "stall speed" (in RPM). You can get different ones with different stall speeds to put the engine RPM into its max power range more of the time. It's especially important for how the car launches. For a pure race setup, you want a stall speed just below the engine's peak torque RPM; then you shift at about the peak HP RPM; with proper trns gearing and engine design as a package, you should be right back down to peak torque RPM after the shift.