O-Line’s Triple-Turbo’d, Sigma Pumped, Billet Block & Head Cummins Is Ready To Dyno

WP Developments and Indianapolis Colt, Dalton Tucker, have slowly been turning the volume up to 11 on America’s most transparent Super Stock diesel truck build. Expect version 3.0 of O-Line to be the most competitive it’s ever been. Here’s why. Billet block and head, fiberglass doors, beefier front axle, and reworked suspension in addition to the retention of the 18mm Fair Valley Performance Sigma pump, triple 107mm turbos from Stainless Diesel, upgraded water-to-air intercooler, FuelTech FT700, and great support and input from the likes of Scheid Diesel, Chaos Fabrication, Kent Crowder, Brad Ingram, and Aiden Hodges (to name a few). Word on the street is that the heart of O-Line has a date with O’Bryant Diesel Service’s engine dyno soon. Stay tuned…

On The [Hub] Dyno

Fine-Tuning The Hollyrock Customs Rail

More sweet, sweet music was made on the Mainline ProHub dyno at S&S Diesel Motorsport recently, and this time it came in the form of the twin-turbo, Duramax-powered rail piloted by Mattie Graves. Hollyrock Customs’ Mike and Mattie Graves made the 650-mile trek to mid-Indiana to fine-tune the 3-second dragster before its next trip down the track. And, judging by the fact that Andre Dusek and Michael Cordova (shown) were involved, the Graves’ rail likely left S&S’s headquarters set on kill and ready to go rounds at Outlaw Diesel Revenge/Ultimate Callout Challenge. Last year, the Hollyrock rail took the win in Indy—the race that has unequivocally become the biggest event in the diesel industry.

Fuel System Tech

Field Testing The Latest Competition Injectors For The L5P Duramax

When you’ve pushed the L5P Duramax platform as far as you can, you lean on your fuel system partners to help you get to the next level. After the folks at All In Truck Performance maxed out a set of Exergy Performance 200-percent over injectors, the experts from Grand Rapids, Michigan developed a set of 300-percent over units for the AITP team to try. The guinea pig for the new sticks is none other than Neal Driedger’s ’19 GMC—the truck that dyno’d 1,579 hp and 1,993 lb-ft of torque on spray (and more recently over 1,400 hp on fuel). While the results are pending on how much added power the 300-percent over injectors bring to the table, there is no doubt that the truck runs considerably cleaner—even with zero tuning changes between the 300’s and the 200’s.

Coming Soon

High-Flow Intake Manifold For The 6.7L Power Stroke

Ever since Wehrli Custom Fabrication turned its attention toward the 6.7L Power Stroke, the company has been belting out product after product. This is their latest development: a high-flow, cast intake manifold and intake horn for ’20-’25 Fords. Not only will it open up airflow pre and post turbo, but by retaining the factory throttle valve it is 100-percent emissions-compliant. On top of that, the folks at WC Fab are working on a version for ’11-’19 trucks. Picture one of these under the hood of your late-model Blue Oval, wearing your favorite color powder coat. We’re told the ’20-’25 version will hit the production line soon.

Diesel Conversions & Repowers

A Different Breed Of Cummins Swap

Big Bear Engine Company has a reputation for building durable, drop-in-and-go Cummins 4BT and 6BT long blocks. Now the Colorado-based engine builder is branching out to offer the electronically controlled ISB 4.5L common-rail in extended long block form. Once released, Big Bear’s ISB4.5 rear gear train engine assembly will come with a base rating of 240 hp at 3,400 rpm, but will also be available with an optional 290 hp rating. On top of that, an all-inclusive conversion package will be offered. The company’s complete repower package includes a viscous fan clutch (and fan), starter, alternator, freon compressor, hydraulic power steering pump, chassis harness with throttle pedal, electric vacuum pump, and a GM 4L80E transmission adapter and flywheel. At Texas Land Cruisers HQ, they’ve been busy fitting one into the Land Rover you see here.

Written by Mike McGlothlin