stall not locking on dyno
stall not locking on dyno Alright guys had my car re dyno again yesterday and the stall converter wouldnt stay locked what the reason for this when i drive stall locks up fine. The stall is a revmax 4k
Joined: Aug 2007
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From: Turnin' Wrenches Infractions: 005
Stop trying to lock your stall on the dyno. If it wasn't staying locked it was probably slipping and throwing clutch material through your trans. You'll be up for a rebuild soon because of it. Hope it was worth it 
It wasnt me trying to lock it my tuner was saying. It wont lock and trying to figure if my stall was bad or not
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Joined: Aug 2010
Posts: 7,323
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From: Ann Arbor, MI
ONLY triple-disk converters should ever be locked at WOT because the lockup clutch on standard converters cannot reliably hold full power. In the stock tune or any good "mailorder" tune the converter is unlocked at 50% throttle (or even much lower) to protect it.
If you didn't pay $1000+, you don't have a triple disk converter.
If you didn't pay $1000+, you don't have a triple disk converter.
Moderator
Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
With a proper tune, it will not lock up with more that 50% throttle.
ONLY triple-disk converters should ever be locked at WOT because the lockup clutch on standard converters cannot reliably hold full power. In the stock tune or any good "mailorder" tune the converter is unlocked at 50% throttle (or even much lower) to protect it.
If you didn't pay $1000+, you don't have a triple disk converter.
If you didn't pay $1000+, you don't have a triple disk converter.
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yes, locking the converter will show more power on the dyno but it is bad for the converter
dynos are tools for tuning, the numbers can be manipulated and don't really mean much
dynos are tools for tuning, the numbers can be manipulated and don't really mean much
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Verdad Gallardo Okay i knew the auto wont show good number i waa just starting to worry that maybe my stall was going out or something thanks thunder
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Joined: Aug 2010
Posts: 7,323
Likes: 529
From: Ann Arbor, MI
I suspect in the old days of barely-300HP engines that a locked converter could handle that power and show a slightly better number on the dyno. But with 500HP+ now being common, a single-disk converter cannot reliably handle that much and dyno operators have not learned that yet.
