Quote:
Originally Posted by Camarothatcould
I know you have your research, and I have followed these exact notes as to a religion when I was going through my swap, but one thing I have always wondered about id the Torque multiplication. . . Where in the world is there over 700 Ft Lbs. going through on the trans???
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A torque converter multiplies torque when it is slipping. The 4.6 converter multiplies at a rate of 2.3:1. The 5.4 produces 90% of its 350 ft lbs of torque at 2000 rpm. 350 x 90% is 315. Multiply 315 x 2.3 and you get 724.5 So on a stock 5.4 swap using the 4.6 converter will put over 700 ft lbs of torque through the transmission. I have 450 ft lbs at the wheels with my blower. If I had a shush box I would be putting close to 800 ft lbs through the tranny at 2000 rpm using a 5.4 converter. That is why people doing the L swap or just adding blowers are breaking the 4R70W.