The differences in torque converters

Duramax_JP

Duramax_JP

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So im curious what are the differences in torque converters. What is the significance of a high stall tq? what does the different stall do? Which would be best for me, i plan to run a cheetah after i build the trans. Which Suncoast tend to be the most popular and why? Any other good TQ brands?
Thanks

James
 
paint94979

paint94979

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Courtesy of Mike Lovrich:

The SC1050-SC1054converters are 200-400 RPMs less stall than the stock converter, from 02-04 most of the power was made on the top end so with the Allison having tow haul with lockup in 2nd we did not try to tighten the bottom end up much. We spent more time with getting the trans to hold than we did working on the converter.

GM-1055-3D
Approx. brake stall is 2600 RPM

Our 1055-3D converter will let huge turbos spool and light. It allows great turbo spool-up and will couple well as a result of utilizing larger windows that offer the more efficient fluid flow . Our #55 IS NOT intended for towing, but if you insist you can, It has no limits. This was designed for drag/sled pulling trucks with XLarge turbos that need to spool.

GM-1056-3D
Approx. brake stall 2000

This is our journeyman converter that incorporates an OEM style stator and custom modified impeller to allow low end torque multiplication (" gets the load moving") and high end efficiency ("puts the power to the road"). Combined with the Sun Coast triple clutch and billet cover it is a great converter for daily driving, towing and or racing. This converter spools good with stock to medium size turbos.

GM-1057-3D
Approx. brake stall 1800

Our 1057-3D converter established a benchmark for performance torque converters. Often referred to as the “McRat” it has set numerous records at the strip since its’ inception in 2005. Our #57 series incorporates a modified OEM stator and is coupled with the "Velocity Series" impeller. It allows good turbo spool-up with stock size turbos running mild tunes and also offers more efficient fluid coupling than our #56 converter. If you’re running the larger turbos and the wild tunes and need to spool see our #55, #58 or #59 series converters.

GM-1058-3D
Approx. brake stall is 2300 RPM

This converter is great for everyday driving with stock to medium size turbos and big HP tunes. It will brake stall at 2300 RPM, but still couples at cruising speeds. Shifts at 2000-2500 and you will see about a 500 RPM drop. This converter has no limits.

GM-1059-3D
Approx. brake stall is 2000 RPM

Ideal converter for twins or quick spool turbos. Our 1059-3D converter will brake stall about 2000 RPM and couples nicely at wide open speeds. When your shifts are at 2000-2500 cruising you get about a 500 RPM drop with the 1059. This converter has two limits, it requires a minimum tune of 220HP and quick spool turbo.
 
paint94979

paint94979

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I would say the most popular Torque Converter of all time is the 1057. The 1056 was used a lot but the most desired TC would have to be the 1057
 
paint94979

paint94979

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Duramax_JP said:
I was gonna go for the 1057 but if the 1055 is better i might go with that.
Click to expand...

It isnt better, Travis has an S400 turbo so he needs the added stall range to spool his turbo... the 1057 is a great turbo for Stock, Cheetah, GT40's, and S300's any bigger than a GT4094 a different Torque Converter is highly recommended
 
Duramax_JP

Duramax_JP

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paint94979 said:
It isnt better, Travis has an S400 turbo so he needs the added stall range to spool his turbo... the 1057 is a great turbo for Stock, Cheetah, GT40's, and S300's any bigger than a GT4094 a different Torque Converter is highly recommended
Click to expand...

Oh ok cool.
 
TrentNell

TrentNell

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paint94979 said:
How much more different does it feel?
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i cant speek for the 1057 but i can say for the 1054 , 1056, and the 1055, the 1055 is perfect for a hotrodded diesel truck with aftermarket turbo and not as big as some think i cant find anything i dont like about it or that it does not do well its very explosive fast spooling and boy does it break the tires loose at 2500 rpm , 1054 is for stock turbo trucks or twins , if i could only find a date that tight :rofl:. the 1056 is great but its like vanilla ice cream its good for everything and most will like it but not to exciting like stock but holds the power .
 
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TheBac

TheBac

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Hey Mike, concerning those original Precision converters you helped design...what SC version were those closest to?
 
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Mike L.

Mike L.

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TheBac said:
Hey Mike, concerning those original Precision converters you helped design...what SC version were those closest to?
Click to expand...

PI in house converter is great for towing and mild power. I would limit it to 450hp only because it is loose and you will blow through it with anything more than that.( strength of all converters is the same ) I had the ML built for McRat when I watched his launch video's at LasVegas and thought his namsake 1057 was a little lathorgic out of the hole. Terry at PI watched the dideo 's and agreed. We came up with the ML. It's a little looser off the line and mimicks the 1057 to a point but a little different.
The converter I'm excited about is his new Cummins stator in an Allison converter. Stay tuned for this one.
 
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