LT1-LT4 Modifications 1993-97 Gen II Small Block V8

94 converter question

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Old Jul 23, 2005 | 02:51 PM
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scotts94_z28's Avatar
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From: Rochester, NY
Default 94 converter question

I had a TCI 3000 stall installed on my 1994 camaro z28 a few weeks back and dont know how high i should be able to bring the revs for a launch. I can bring them up to about 2000-2200 before the tires starts to spin and i had thought i would have been able to bring the revs up higher then this?
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Old Jul 24, 2005 | 05:47 AM
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when you order a certain stall, its not an exact science, it may be off a couple hundred RPM, depends on how much HP you're making, the more power, the higher the stall, also there are TWO different ways to rate stall

Brake Stall - what the avg. joe does to test stall speed (like you're saying) &
Flash stall - what the RPMs run up to when you stomp the gas from a dead stop in first gear, before it starts moving the car/spinning the tires traction depending, this may be several hundred rpms higher than brake stall

Converter companies that sell you a "3000" stall converter, are giving you 3000rpms as a flash stall rating. a typical converter that actually flashes to 3,000 will probably only brake stall to about 2,600 if you get 2,000 - 2,200 you probably have more of a 2,500-2,700 stall converter. You can always send it back and have it re-stalled, or just make more hp
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Old Jul 24, 2005 | 07:46 AM
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What is Torque Converter Stall?
The easy answer is: The RPM a torque converter will allow the engine to attain with a given engine torque input.
How is Torque Converter Stall Measured?
That's where the confusion begins between the racer and the high-performance torque converter builder. Stall is measured in three different ways. TRUE, BRAKE and FLASH Stall. The only true way to set stall is using TRUE stall math.
What is TRUE Stall?
True stall is measured with the transmission locked (Trans brake) and the drive shaft still. The throttle is then fully depressed and held to obtain the holding RPM of the torque converter. This is the "TRUE" Stall.
What is Foot Brake Stall?
This is attained with the transmission in gear and the brakes depressed fully. Now slowly apply the accelerator. The RPM the engine reaches the moment before the tires spin is known as the "BRAKE" Stall. BRAKE Stall is not a consistent way to measure your stall converter and has many variables. This method will be lower then TRUE stall by 400-800 RPM.
What is FLASH Stall?
Flash stall is generally read while the car is in motion. While rolling at a slow speed the throttle is depressed fully to see where the RPM will flash (or peak). This method will not be true if tires spin or car is rolling too fast. Due to the turbine already turning in the torque converter we end up with less torque multiplication. This will give you a lower stall reading of between 200 and 600 RPM under the converters TRUE stall in the same application.
Why do I need a CUSTOM built high stall torque converter?
A torque converter that has a part number has many applications. Many manufactures sell you the same advertised 3200 rpm stall converter for your small block as they would for the next customers big block. This will always result in two very different stall settings ... Do you need a custom built high stall torque converter? Perhaps you don't, but building the units on a one to one basis allows us to put out a product that is configured correct the FIRST time. This is done using a "Performance Torque Converter Application Sheet." It's with this information we can custom configure your high performance torque converter to get the most gains from the performance upgrade.
Why not just buy the "other guys" $99 special?
I was always told that "You get what you pay for." This has never been truer than with a torque converter. Some racers will spend thousands of dollars on the drive train, only to lose 30% of that hard-earned power in a cheaply designed torque converter. Inefficiently stalled torque converters build unwanted transmission heat and never get close to coupling one-to-one (pump to turbine).

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There is more to life than the first 60 feet!
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