SunCoast Converters (INFO)

[Iowa Farmboy]

Could some one please explain what exactly is "stall speed"? I have always been confused. I'm stupid but does it mean that the truck under normal driving would not move until 2300 rpm for example. Creating a tire burning start every time. I'm sorry if this has been covered before but I have not found it using the search button.

[IdahoRob]

Remember, those stall speeds posted are with stock tuning. Also the converters all react differently in different applications. At 700HP my street truck and a 1057 will stall well over 3000rpms.

Make sure to talk to someone that knows how these converters work in your own application.

[IdahoRob]

Originally Posted by Iowa Farmboy

Could some one please explain what exactly is "stall speed"? I have always been confused. I'm stupid but does it mean that the truck under normal driving would not move until 2300 rpm for example. Creating a tire burning start every time. I'm sorry if this has been covered before but I have not found it using the search button.

With a diesel converter, they all will couple and move the truck at any thing off idle. These stall speeds are loosely definded by mashing the brakes and flooring the throttle and where the engine will hit a wall in rpms. HP has a huge effect on stall speeds though.

[Duramax_JP]

Originally Posted by MMLMM

Ok this is all on the SC site, but I went thru it and grouped it all together to help people in need when shopping for a converter from SC. Hope it helps someone.


The Sun Coast diesel torque converters, designed and manufactured by Sun Coast, are engineered to improve the efficiency of your vehicle from off idle to maximum RPM. Sun Coast converters are designed to maximize the efficiency of a vehicles engine and torque converter combination to improve the acceleration and pulling power of your diesel truck. With the engine performance enhancements available for diesel engines, a more efficient and durable torque converter is required to optimize the vehicles performance.

Sun Coast torque converters include the latest in converter technology and are suitable for highly modified diesel engines. If your truck is used for towing (5th wheel travel trailer, horse or livestock trailer, boat or equipment trailer) the Sun Coast converter will vastly improve the performance and reliability of your truck. The Sun Coast converter features our multiple 3-disc clutch along with our billet steel cover to provide 3 times the torque capacity of the factory converter. Sun Coast does not use "one size fits all". Utilizing our billet "radial pull" stators, Sun Coast offers a converter specifically designed for your application. If you are looking for a combination of long service life, dependability, and performance, Sun Coast converters delivers.

Features:
Furnace Brazed Impeller
Torrington Needle Bearings
Precision Steel Pump Drive
Custom Stator
Multiple Disc Lock-Up Clutch
Billet Steel Cover



The Converters:
1054
Approx. brake stall is 1900 RPM

This converter is great for everyday driving with stock to medium size turbos and big HP tunes. It will brake stall at 1900 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.


1055
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.


1056
Approx. brake stall 2000 RPM

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.


1057
Approx. brake stall 1800 RPM

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.


1058
Approx. brake stall 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.




Notes:
New for 2008 are our custom designed billet stator series #54, #55, #58 and #59.

Larger turbos may need our #55 or #58 converters.

With the addition of the 1055, 1058 and 1059 to our Allison torque converter line we can accommodate any request in regard to stall, torque multiplication, efficiency, or other custom application. The stall test and RPM drops were tested with Stage V transmission, stock turbo with a 350HP tune, stock size tires in our 3500 dually. The example stalls and RPM drops are strictly to help you decide which may be best for your truck. Big tires without gear swaps will raise your brake stall test numbers.

Again, this is directly from there site. I am no way affiliated with SC. I run there product and have had good luck with it. I am posting this for information to the forum for quick reference.

1059?

I wasnt aware there was a 1059 or did I read wrong?

[IdahoRob]

1059 has really never been out(just a couple). Was supposed to be for twins.

There is a brand new one in testing right now that looks promising.

[chevymakesitizuzushakesit]

tahnk u that finally helped me pick which t/c im gettin thank thank u

[HumboldtDmax]

So what is the brake stall of our stock TC so we have something to compare to?

[couchj317]

Originally Posted by MMLMM

The Converters:
1054
Approx. brake stall is 1900 RPM

This converter is great for everyday driving with stock to medium size turbos and big HP tunes. It will brake stall at 1900 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.

What does this 500 rpm drom refer to? lower rpms at cruising speeds, different shift points, lock up speed, or what?

[gya0ma7ha]

Originally Posted by couchj317

What does this 500 rpm drom refer to? lower rpms at cruising speeds, different shift points, lock up speed, or what?

I think it is referring to how engine much the engine rpm will drop when the converter locks. Lets say your accelerating, easily, and your converter decides to lock, your rpm will go from lets say 2000 to 1500, while you are accelerating.
But i am not sure, just assuming, and we know what happens when we assume haha.