spacemonkee23
+1y
13B-DEI (out of a second gen RX-7) won't have a lot of torque, some where around 140ft.lbs. torque and 160hp depending on what model year you get S4 or S5. Then there is a turbo II out of a second gen single turbo around 180 on both torque and hp... but you could go 13B-REW (3rd gen RX-7) twin turbo *drool* that would be a nice "boost" in power somewhere around 200-225 torque and 250hp stock.
Any route you take with rotary will be a performance increase in HP but non-turbo will feel sluggish off the line and at low end speeds, rotary's like to cruise around 3500 rpm thats where the torque power band is strongest (stock). It has been years since I had my T4 turbo FC convertible and I miss the crap out of it, but my dad still sports his 450whp FD that thing is a monster!