Torque Converter Slippage Discussion
Hey guys, just wanted to discuss this with fellow gear heads. I was curious about the percentage of drivetrain loss and converter slippage that I may be seeing. Now, Im not sure if converter slippage and drivetrain loss are the same, probably not but I'll let one of you clear that up for me. Anyway, I used TCI's slippage calculator to determine how much slippage my tc was seeing. I used the trap speed of my last time slip and I used an rpm calculator to determine rpm. I entered 122mph at 5,490rpm (3rd gear in a 4L65E, 1.0 ratio), 3.42 rear ratio and my rear tire height of 25.5in. I got a slippage of 0.005%. Does that sound right or is it too low? Just to be sure, I watched one of my track data videos and entered a lower rpm and speed when I knew I was in 3rd with the tc locked and I still got 0% slippage.
Built 4L65E with a Yank SS3600. http://www.tciauto.com/tc/racing-calculators |
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All this is going off memory from years ago when I looked into this, so take with a grain of salt. |
Ben, you are right on.
C5Natie, what is it that you are trying to figure out? Are you thinking of going with a different stall speed or are you just trying to figure out what your flywheel horsepower is? |
Thank for the responses guys.
I wanted to see how efficient the tc is, or still is since its about 6yrs old and I guess to help.figure out power output as well. So, tc slippage is only when the tc isnt locked and it unlocks at wot, right? Sorry I always get confused. I remember now, it unlocks at wot or with more throttle. Hence why rpms raise up with a little more throttle while cruising, the tc is unlocking. Duh! |
Also I was looking to see if people wait for a certain amout of slippage before rebuilding the tc. Mine still feels really solid though.
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I really don't think you need to worry about the slippage increasing. The bigger concern is ballooning it.
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