Originally Posted by daveyboy
Mine did about the same thing. The thing really doesnt start to make power till 3000 rpm. It really needs a stall around there or a bit closer to the peak torque to really 60' Like it should. I know there are converter companys out there that make converters drive like a street converter put stall like a race converter.
I had mine done by Andre @ Edge Racing Converters. It's a very streetable converter for 3500rpm. But as soon as you get the throttle down 1/4 ways the rpms shoot up to 3000-3500 and it pulls without even downshifting. Truly the best mod any automatic can do. Anything less then 3500rpm on a Zetec motor and you will bog it down off the line. 4000Rpm would be a perfect race converter, I've been told you want to get within 500-700rpm's of your peak torque. I'm not sure what a Duratec would need though.
I'm not sure what Lentech does for converter speeds but the few members that bought one had less then 3000rpm stall and IMO that's a waste, your leaving alot on the table. If I had a mustang I would see Andre or head over to Yank or PI.