02 F-150 4R70 trans with stock convertor. Improved the power by tuning. What convertor should I get?

 

Unless there is a problem with your converter, don't bother replacing it. They rarely fail. And when they do, it's usually the lockup clutch material having worn down. Just like a clutch does. Even if you added a supercharger to your rig or swapped to a V10, the OE converter would work just fine. The transmission's internal are the weak link, but they're still more than sufficient to get the job done.

In the racing world, torque converters are swapped for different levels of resistance (sometimes referred to as "stall speed"). The goal is to make the best use out of a given engine's power-band. An engine's power-band is a product of the camshaft primarily, and the intake manifold to a lesser extent. A simple tune does nothing to change the overall power-band.

The power gains on a tune are negligible. And surely no cause to beef up other components.

For more information, here's a site that better explains the whole "stall speed" thing.

http://www.bankspower.com/techarticl...ng-Stall-Speed

 

Thanx for the info.

 

i love my 2400 stall converter.

 

I have the same rear gear ratio but a 31.6 tall tire. I run E85 and it's tuned now that the rear end hops hard on takeoff. How is your launch? What brand convertor do you have?

 

i have a Circle D converter.

looks at my thread of the long bars i have.

you need some long bars!

 

I've got a 4R70 and they don't have a convertor for it. I'm looking into a bolt on 4 link.

 

Yes they do. That's the trans that I have.

Just get you some long bars and you will be good to go.