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Jeff Chambers · 10-30-2002, 07:30 AM

If you're going to be racing the car, the lock-up converter will give significantly better performance down track. With a Lentech style valve bocy, you can bring in lock-up after shifting to third. At that point you've removed all slip from the converter (1:1 drive ratio), transferring the engine power to the transmission in the most efficient manner. If you've got a loose converter, this can be pretty substantial. My converter shows about 17% slip at 7000rpm, so when I activate lock-up I'm going from 17% to 0% slip. ET and MPH are significantly better (like 3-4mph) than if I don't activate lock-up.

10-30-2002, 07:30 AM	#7
Jeff Chambers Moderator Join Date: Aug 2000 Location: Milan, OH Posts: 2,699	If you're going to be racing the car, the lock-up converter will give significantly better performance down track. With a Lentech style valve bocy, you can bring in lock-up after shifting to third. At that point you've removed all slip from the converter (1:1 drive ratio), transferring the engine power to the transmission in the most efficient manner. If you've got a loose converter, this can be pretty substantial. My converter shows about 17% slip at 7000rpm, so when I activate lock-up I'm going from 17% to 0% slip. ET and MPH are significantly better (like 3-4mph) than if I don't activate lock-up. __________________ Jeff Chambers 1990 Mustang GT 10.032 Seconds / 137.5 MPH 14-time Street Warrior World Record Setter CRT Performance 2001 Tropic Green Mustang GT - 12.181 / 113.2 MPH 2002 Ford F-250 Crew Cab 7.3l Power Stroke - 17.41@77.2 "There's nothing boring about a small block automatic shifting gears at 9400 rpm!"