Tier One's 6.7L Cummins 68RFE Race Truck Build!
We here at Tier One put our money where our mouth is when it comes to our built transmissions by building one heck of a powerful truck and throwing one of our own built 68RFEs behind it! Tier One's 6.7L Cummins Race Truck was specifically designed to tear it up on the dyno and get quick times at the track. Tier One's Race Truck features a fully-built 6.7L Cummins that's outfitted with a massive 91mm turbo, huge injectors, a 3-stage nitrous system, and enough high-strength components to hold all that horsepower and torque. Behind the engine is one of Tier One's very own built 68RFE transmissions that harnesses the over 1700hp (estimated) generated by the motor and puts it down the tires. Check out the full build list below, and stay tuned for where we take this truck next!
The first stage of our Race Truck built threw down 1692 horsepower on the dyno thanks to its combination of an impressively large turbocharger, some serious fuel upgrades, and enough built engine components to handle it all. Surprisingly enough, the first phase of our project build "only" had one of our Stage 2 68RFE Transmissions. While we only rate our Stage 2 68RFEs to 750 horsepower, we wanted to put the transmission to the test in a big way and really push its limits. The Stage 2 68RFE managed to hold its own through multiple dyno runs and track launches without letting us down.
Round 1 Engine Mods:
While hitting nearly 1700 horsepower with the first iteration of our truck was all well and good, we wanted even more horsepower and torque. To that end, we jumped up the boost pressure with an even bigger turbo and threw even more fuel at the problem, all while rebuilding the motor from the block up with high-strength block, heads, rotating assembly and much more. We paired the new engine build with one of our 68RFE Competition All-Out transmissions that's rated to handle over 1000+ horsepower. Granted, our hope is that phase 2 of our race truck build hits over 2000 horsepower in the hopes that we actually find the limit of our competition transmission and the truck itself. Round 2 Engine Mods:
Tier One's Race Truck Build Round 1
- ARP 625 Head Studs
- Manton Springs & Retainers
- Manton Pushrods
- Industrial Injection 128% nozzles
- DDP 12mm CP3
- FASS Fuel Systems Fuel Pump
- Stainless Competition Manifold
- Borg Warner S480 Turbo with a Billet Wheel
- Tier One Stage 2 Transmission
- Revmax Billet Triple Disc Torque Converter
- Billet Input Shaft
- Additional Performance Clutches
- Rollerized Sprag
Tier One's Race Truck Build Round 2
While hitting nearly 1700 horsepower with the first iteration of our truck was all well and good, we wanted even more horsepower and torque. To that end, we jumped up the boost pressure with an even bigger turbo and threw even more fuel at the problem, all while rebuilding the motor from the block up with high-strength block, heads, rotating assembly and much more. We paired the new engine build with one of our 68RFE Competition All-Out transmissions that's rated to handle over 1000+ horsepower. Granted, our hope is that phase 2 of our race truck build hits over 2000 horsepower in the hopes that we actually find the limit of our competition transmission and the truck itself. Round 2 Engine Mods:
- D&J Stage 3 Cylinder Head with Billet Side Draft
- D&J Billet Rods
- D&J Billet Pistons
- D&J Machined Block with Billet Girdle
- D&J Billet Front Cover
- DDP 350% Fuel Injectors
- DDP Twin CP3 12mm Pumps
- Fleece Dual Pump Mounting Kit
- Waterman Lift Pump
- Manton Bridges
- ARP 625 Head Studs
- Garrett GTX 91mm Turbocharger
- Steedspeed Competition Manifold
- Tier One 68RFE Competition All-Out Transmissions
- Revmax Billet Triple Disc Torque Converter
- Revmax Billet Input Shaft
- Revmax Billet OD Hub
- Revmax Billet Center Support
- Additional Performance Clutches
- Revmax Promod Sprag
- Tier One Billet High-Pressure Valve Body
- Revmax Billet Flex Plate
- Nitrous Express Maximizer 6 System
- 375 Lightning Solenoids
- 3-Stage System
