245mm Street / Strip 2500-4500 Stall Torque Converter
As the innovators of the spragless converter, Transmission Specialties is renowned worldwide for the highest quality racing torque converters. As the innovators for the industry, we know what works and what doesn’t. There are no smoke and mirrors here, just the highest quality racing converters built from the best materials money can buy. TSI is the world’s largest supplier of racing torque converters components. Nearly every other converter company in the world uses our components in their builds. We are happy to present one of our most popular converters we sell.
The TSI 9.5” 245MM Torque Converter is the perfect converter for the racer with 300-1000HP. This converter is known in the industry as many names such as 9”, 9.5” 245MM and 10”. Don’t get confused, they are all the same, just different ways of advertising the same product. Only the highest quality hand fabricated or billet front covers, furnace brazed pumps and turbines are used in our converters. Our stator designs are revolutionary and will give you lightning-fast launches while still coupling hard on the top end.
A few notes about the sprag options you can choose from. Any builds over 800HP need to select the Mechanical Diode or Spragless Options. Customers that want the most consistent ET will want to select the Spragless Option. By selecting the Spragless option you eliminate the one-way clutch in the stator. The one-way clutch is not only a failure point but it leads to inconsistency due to slippage. The only negative of the Spragless design is the inability for the stator to freewheel. This lack of freewheel will slightly lower the ET and MPH versus a mechanical diode or sprag setup. The mechanical diode option is available for those racers who want to shave the last little bit of ET off and increase MPH. By selecting this option, you will now have a stator that is allowed to free wheel after reaching its stall speed. This free wheel action allows the oil to flow smoothly from the turbine to the impeller. This smooth oil flow allows better coupling which results in improved ET and MPH. The mechanical diodes we use at TSI are the strongest in the industry and have been tested for over a decade in the most demanding applications!
After making your selections and putting the item in your cart. You will be prompted to fill out our converter build sheet before submitting your order. Using the selections, you selected and your build sheet, the engineers at TSI will hand craft a custom converter for your specific application. We do not sell “off the shelf” converters. Each is hand tailored to your application! Our converters feature the following:
- Furnace brazed and tig reinforced impeller
- Furnace brazed and tig reinforced turbine
- Hand Fabricated stamped steel front cover with internal anti balloon plates or Billet cnc machined front cover
- Billet 4340 Impeller hub
- Billet 4340 Turbine hub
- Anti Balloon Plates
- Torrington bearings throughout, no plastic or bronze thrust washers
- Precision internal clearances to maximize coupling on the big end
- Computerized balancing to insure smooth operation
- Robotic welding for a leak free converter while saving weight
- Pressurized and leak tested after welding
- Maximum runout of .005”
- Hand built to your specifications by our engineers