Not that long ago, Hennessey criticized GM over a problem that affects the mid-engine Corvette and full-size trucks. More to the point, a hellish level of encryption locks out the tuning company from making critical adjustments to the ECU.
In other words, Hennessey relies solely on a supercharger or a turbocharger to extract more power from small-block V8s such as the Corvette-exclusive LT2 and L87 truck engine. Performance shop Fasterproms is facing a similar issue with their Procharged Silverado, but be that as it may, this pickup truck lays down 675 RWHP.
In addition to the D-1X centrifugal supercharger, the double-cab workhorse has also been treated to methanol injection, a heavy-duty intercooler, sportier exhaust headers, and a Stage 2 upgrade from HP Tuners. The 10-speed automatic transmission could use some tuning as well because the shift points occur too early.
The reason Fasterproms couldn’t work their magic on the torque-converter box is that 2020 models feature a different computer and software than 2019s. Looking on the bright side, you can’t deny that 675 RWHP is more than adequate for an engine that develops 420 crank horsepower as standard.
What is dubbed “the world’s most powerful 2020 Silverado” exhibited an odd problem immediately after the dyno runs. According to Fasterproms owner Jeremy Formato, “the air-fuel ratio on the street was like 10 to 12 percent different than what we had on the dyno. I struggled to get the air-fuel ratio where it needed it to be, and now it’s actually usable and manageable on the street.”
Not only passenger cars, but SUVs and pickups get increasingly more complicated with each passing year. This complexity translates to more control for the automaker over the software, which means that only authorized dealerships have access to specialized diagnostic tools for reading and modifying the software.
On that note, putting a deposit down on a Silverado may not an inspired choice for those people who are looking forward to extracting ridiculous horsepower from their trucks.
After a 1:43 scale model of a Ferrari 250 GTO sparked Mircea's interest for cars when he was a kid, an early internship at Top Gear sealed his career path. He's most interested in muscle cars and American trucks, but he takes a passing interest in quirky kei cars as well. Full profile
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