Aftermarket converter question?
10-11-2005, 04:56 PM
#1
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Aftermarket converter question? When the car is dyno'd and you have a 3400 stall and the dyno operator starts after the rated stall speed would the tq readout be lower then if it was started at a lower rpm?
I heard that tq multiplication is less after the rated stall speed of a converter...is that correct?
I'm just trying to come up with answers as to why i lost peak torque after my cam install.
I heard that tq multiplication is less after the rated stall speed of a converter...is that correct?
I'm just trying to come up with answers as to why i lost peak torque after my cam install.
10-11-2005, 10:16 PM
#2
Torque multiplication decreases as rpm increase. It is a downward sloping curve. The converter will increase tq past the stall speed to about the point where it couples up (not the same as lock-up). You can use your shift extension as an estimate. Above that you will lose 3 - 6% compared to a locked converter.