Enthusiasts 2015 Chevrolet Silverado 2500HD Speed Demon
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When Michael Runk bought his ’15 Chevrolet Silverado 2500HD, he immediately liked the power and torque of the 6.6L Duramax LML engine, but he thought the truck could be a little faster. “At one point right after it was new, I had one of the fastest LML-powered rigs in the country,” Michael laughs. “I didn't mean to; it just sort of happened.” Like any diesel enthusiast, Michael started his upgrade process with ECM tuning, then turbocharger swaps.
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After conferring with Cody Spaulding and Mike Graves of Hollyrock Performance, Michael then added nitrous oxide and an awesome transmission from Evan Drosehn at Limitless Diesel Performance. “That led to a best elapsed time of mid-12s on fuel—and an 11.46 at 120 mph with nitrous,” Michael recalls.
When we shot photos of Michael's ride, it was dialed back from its 11-second trim. However, “The nitrous is still on there if I need it,” Michael points out. In its current and past forms, the 6.6L engine remains bone-stock, with the exception of a set of ARP 625 cylinder-head studs and a keyed crankshaft. The air and fuel systems, on the other hand, are massaged quite a bit.
2019 Chevrolet Silverado: A Tale of Four Tailgates
And an explanation of the coolest power-up oneTouch the electronic latch on the tailgate or double-tap the tailgate button on the key fob and the latches release, then the motor spins to slow the descent of the lightweight aluminum gate. To close it, use the remote, find the switch, or just manually lift the tailgate part and the motor brings the gate up until the latches catch and pull the door closed. There are force switches that reverse the motor if any resistance (like from fingers) is felt, and obviously it won't close if something is resting on it.
Fuel upgrades start with Michael using Fleece Performance Engineering’s CP3 conversion hardware to ditch the stock CP4 injection pump in favor of more reliable CP3 pumps. He then added a pair of 10mm Exergy Performance CP3s (one in the valley of the engine) using an ATS Diesel Performance Twin Fueler kit. A set of 100-percent-over Exergy injectors was added, as was a FASS Fuel Systems 150-gph lift pump.
The fuel system isn't the only part of the engine that received upgrades, as Michael has gone through several different turbo combinations. The setup presented in the photos is based on an HSP Diesel swap kit that’s highlighted by a BorgWarner S476 turbocharger prepared by Engineered Diesel and Pacific Performance Engineering up-pipes. Exhaust exits through an AFE Power 4-inch downpipe and intake air is chilled by a Mishimoto air-to-air intercooler. Michael doesn't want to have a shortage of nitrous, so he used some of the biggest pieces he could find from Nitrous Express, along with a Maximizer 4 progressive controller.
2018 GMC Sierra 2500HD
After the gold rush.
With a conservatively estimated 700 hp on fuel and 900 hp when nitrous is flowing, the stock LML driveline’s fortifying includes a full competition transmission from Limitless Diesel Performance. The Allison 1000 six-speed automatic on steroids features billet C2 and P2 planetary gears; aftermarket input, main, and output shafts; a shift kit; Raybestos and Alto clutches (in a top-secret combination); and a SunCoast Diesel Transmissions triple-disc torque converter. Michael also went a bigger step toward drag racing his rig by lowering the rear, reinforcing the front end, and adding high-traction Nitto 420S tires.
“The truck only has 19,000 miles on it in three years, because we spent a lot of time running it at the track,” Michael laughs. In the end, though, he says one of the best decisions he made was retaining its street qualities. “It's a great truck for driving when the weather is nice.”
Why retire an 11-second truck? Michael is going all-in, building a Pro Street drag truck. “It should have nearly double the power and weigh about half as much—so it should be just a little faster, right?” Now that its track time is minimal, Michael plans to start driving the ’15 much more. “It's still a great driver, and there were definitely times I wanted to give up, but in the end I'm so glad I built this truck.”
2019 Chevrolet Silverado 4500HD / 5500HD / 6500HD: Chassis Cab Flexin'
2019 Chevrolet Silverado 4500HD / 5500HD / 6500HD: Chassis Cab Flexin'Expanding on its current heavy-duty-pickup lineup of the Silverado 2500HD and 3500HD, General Motors aims to match and overtake its rivals in the market for this type of chassis-cab unit. Chevrolet had previously announced it would be showing the 4500 and 5500 but surprised the crowd with the addition of the 6500. In contrast to the “heavy duty” pickups, these are “medium duty” in industry parlance, distinguishing them from the heavy Class 7 and 8 trucks that typically require a commercial driver’s license to operate—think box truck rather than semi.
Year/Make/Model: ’15 Chevrolet Silverado 2500HD
Owner: Michael Runk
Hometown: Sykesville, Maryland
First Look–2019 Chevrolet Silverado 4500HD, 5500HD, and 6500HD Revealed In Indy
Debut marks GM’s return to medium-duty market.That powertrain combination has been proven in generations’ worth of smaller GM trucks, but in this situation it creates 350 hp and 700 lb-ft of slow-churning torque. That’s more power than any of the tunes for the Ford F-650/750’s Power Stroke V-8, with as much or more torque than two of the three Power Stroke versions.
Odometer: 19,000 miles
Engine: 6.6L Duramax V-8, keyed crankshaft, ARP 625 cylinder-head studs
Fuel: FASS Fuel Systems 150-gph lift pump, twin 10mm Exergy Performance CP3 injection pumps, 100-percent-over injectors, Fleece Performance Engineering CP3 swap kit, ATS Diesel Performance Twin Fueler system
Air: BorgWarner S400 76mm turbocharger prepared by Engineered Diesel, HSP Diesel turbo-swap kit, PPE up-pipes, Mishimoto air-to-air intercooler
Exhaust: AFE Power 4-inch downpipe, SoFlo Diesel Custom Stacks dual 6-inch stacks
Programming: EZ Lynk with tuning by PPEI
Transmission: Allison 1000 six-speed automatic by Limitless Diesel Performance; billet P2 and C2 planetaries; aftermarket input, main, and output shafts; Pacific Performance Engineering deep pan
Horsepower: 900 hp
Torque: 1,500 lb-ft
Tires: 305/50R20 Nitto 420S
Wheels: 20x10 BMF Novakane
Suspension: McGaughy's Suspension 2-inch drop shackles, one leaf removed, CalTracs traction bars, Cognito Motorsports tie-rod braces, pitman-and-idler-support kit
Axles: 3.73 gears, AFE Power differential cover
Body: SoFlo Diesel Custom Stacks Cree LED foglights and lightbar
Interior: AutoMeter Competition Instruments recall gauges, Dirty Hooker Diesel Dirty Alli-Locker, BD Diesel Performance staging limiter
Fun Fact: The Silverado’s best 60-foot time is 1.63 seconds, which is pretty good for a 7,600-pound truck! Michael says the good launch is the result of perfecting his technique over many dragstrip passes.
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This Retro Cheyenne Conversion Of A Modern Silverado Is Awesome .
Why didn't Chevrolet think of this?Why didn't Chevrolet think of this?
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