Torque Converter Selection | How to Choose the Correct Torque Converter

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What does a torque converter do? A torque converter is a fluid coupling device that transfers power from engine to transmission and multiply the torque being created by the engine.
There are three major components that make up a torque converter.
The Fluid Impeller is the only part of the torque converter that is physically attached to the engine. The impeller creates fluid motion within the converter to create a transfer of power. The Stator redirects fluid flow towards the impeller. The Turbine Assembly transfers the motion between the engine and the transmission. Another important aspect to understand is Stall Speed = RPM when the engine sends all available power to the transmission.
Torque converters have 2 different types of stalls that they can produce. The 1st type is Foot Brake Stall. Foot break Stall is an inaccurate way to measure torque converter stall.
Flash stall is the actual stall of the torque converter. Flash stall is always listed in range which is determined by different attributes such vehicle weight, gear ratio and tire size. The flash stall rating is the only true and most accurate stall rating that you will find on a torque converter.
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In the interest of making the car more streetable, you should consider changing the camshaft first. Then, match the rear end gear and a new torque converter to the new cam. Thanks for watching! Please let us know if you have any additional questions.

SummitRacing
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hands down the best explanation i've heard yet. it finally clicked with this video

justincrasi
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Great video, I think this guy knows his stuff, the torque converter is a very complicated part, as is the automatic transmission...Ed

ekitching
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Would have been good to note that a lockup converter won't have the issue of stalling higher than cruise RPM. Also, would like you to address what typical factory stall ratings are....maybe provide the stall figures for common vehicles to help us understand the impact of changing stall speeds for those vehicles.

ozzy
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This guy knows what he's talking about. Trust me. I've learned from trial and error. Blew my stator in a foot brake stall left me using my gears manually in a automatic transmission. Had a bad sprag and/or one way clutch.

mydarlingmiranda
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A converter with a stall around 2, 400 - 2, 600 rpm would be the best choice for your combination. We suggest going with a Hughes HUP-22-25L converter which matches your combination very well. Thanks for watching! Please let us know if you have any additional questions :)

SummitRacing
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I like the screwdriver in the engine stand peg hole keeping that chevy small block from flipping over. Good car guy stuff there.

MCRmechanic
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This is great information, I found my self LOL half way thru the video everytime he said "go ahead"

HaltomAutoworks
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We have a few additional questions that we would like to ask you. This is a bit of a complex topic that would be better to discuss with our tech line. Please give our tech line a call at 1-330-630-0240 so we can give you the best suggestion. Thank you for watching and we hope to hear from you soon!

SummitRacing
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Thanks for the info! Someone give me a dollar for everytime he says "which is gonna go ahead and.."

texashankpalmer
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I like the screwdriver in the engine stand.

ryankelly
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Hey, thanks for the suggestion. We will get the lock up torque converter video done. We should post it some time next week!

SummitRacing
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A torque converter with roughly a 2, 500 rpm stall rating would be the right choice for your combination. I suggest you go with a Hughes Performance torque converter part # HUP-22-25EL ($419.95). Thanks for watching and let us know if you have any additional questions.

SummitRacing
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Looking at the combination you will be putting together, your vehicle will require a minimum of a 2, 500 stall converter to perform well. I suggest going with a Hughes converter part # HUP-24-25 ($249.95) for the best performance. Please let us know if you have any additional questions. Thanks for watching!

SummitRacing
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Our tech department has a few questions for you before a suggestion can be made. Would you mind giving our tech department a call? 1-330-630-0240. Thank you for watching!

SummitRacing
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You will want to go with a converter that stalls around 2, 000 rpm. I suggest go with with one of our Summit converters part # SUM-G2704-12 ($229.95) for the best performance. Thanks for watching and please let us know if you have any additional questions.

SummitRacing
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Great job explaining that. Glad you stated about the range and all the variables. That does make more sense. And I like the part about stalling at 500 rpm higher than camshaft . Also the part about choosing a converter that will stall below highway cruise rpm. Did not know that one.

MrCbell
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Most people make the mistake of changing the torque converter when they really need a different rear axle ratio.

falcorthewonderdog
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By the way I bought a transgo shift kit from you guys to put in when I do the build. You guys have excellent service!

JonFFavale
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No problem! Let us know if you have any additional questions. Good luck!

SummitRacing