Triple Turbos, 1,200 RWHP, And 10-Second Time-Slips 

The story of Matt Misner’s Duramax-powered Chevy starts out like many others, with a mildly modified street truck that also saw its fair share of work duty. Soon though, the modifications came fast and furious, with the truck receiving a 7-inch lift, solid front axle and built engine. After partnering up with Fleece Performance, the truck went 11.27 at 120 mph in the quarter-mile, which Matt felt was way, way too fast for being that high up in the air. So, the transformation into what you see here began.

“11.27 at 120 mph in the quarter-mile.”

Prototype Ride

At the time, Matt’s ride was a test bed for Fleece Performance, which was developing a line of billet-wheel BorgWarner-based turbochargers. The truck received a 68mm turbo, then a 71mm, and finally a 75mm charger that made 1,003 rwhp on fuel, and got Matt kicked out of the track for not having a roll bar. If the team was to continue to progress, changes had to be made, so a new frame was sourced, and everything was swapped over, except for the solid axle front suspension. Instead of lifted, the truck would now be lowered, approximately 3 inches in the front, and 4 inches in the rear. The front drop was achieved merely by cranking the torsion bars all the way out, while the rear was lowered by removing two leaves in the spring pack, and using drop shackles.

Lowering the truck wasn’t the only modification to the suspension, however, as Rancho 9000 shocks, Cal Tracs traction bars, a PPE Center link, and Fleece Performance tie-rod sleeves were also installed on the new IFS rebuild. For the street, the rig rides on 305/50R20 Nitto 420S tires, while at the track, super-sticky 28×14.50×16 Hoosier Quick time Pros get the call. With its new lowered stance, Matt decided that it was also time to step his game way up, and go after more power once again.

Power Parts

The engine is the same one that was in the truck when it was lifted, and although the block and (surprisingly) cylinder heads are stock, the rest of the Duramax is chock-full of aftermarket parts. The factory crank swings a set of Carrillo rods, and lowered-compression 15.5:1 PPE pistons. ARP fasteners are used throughout the engine, and secure the heads to the block, the rods to the crank, and the main caps to the block. SoCal Diesel also supplied parts for the build, such as one of their performance dampeners, 3388 camshaft, and valve springs and retainers. The pushrods are one of the only parts not from SoCal, and were sourced from Merchant Automotive.

Lifted or lowered, Matt definitely didn’t skimp on the power-producing parts over the course of his Chevy’s construction. Exergy Engineering 100 percent over injectors were installed, along with ported fuel rails. Fleece Performance supplied twin CP3K pumps; modified Bosch units that are designed to help support fueling at more than 3,000 rpm, which were installed on the engine with parts from ATS and PPE Dual Fueler kits. For induction, the turbo setup was stepped up drastically once the truck was lowered. The billet 75mm Fleece turbo was retained, but now had twin 68mm Fleece turbos blowing into it. The triple-turbo setup was put together using piping from Vibrant Performance, and raised boost pressures considerably, from 55 psi with the single, to 85-90 psi with the triple turbos. Horsepower went up as well, by about 200 hp to the rear tires.

Transmission Work

Surprisingly, the Allison 1000 holds up to an estimated 1,200 rwhp quite well. The transmission behind all this power and torque even has stock shafts, although it’s been rebuilt by Fleece Performance with Raybestos clutches, deep pan, and 2,800-rpm Sun Coast converter. Fleece also did the transmission tuning on the truck, and installed one of its Ally Lockers to control converter lockup.

“85-90 psi with triple turbos.”

Results

With a substantial weight savings over the old 11-second setup, Matt’s current efforts have certainly paid off, as the Chevy has rocketed down the eighth-mile in 6.71 seconds at 109 mph. Translated to quarter-mile numbers, that’s roughly 10.30, at more than 135 mph! What’s even more impressive is that he still has never been off tune 3, a mild setup that only generates about 1,400 degrees on the EGT gauge during a pass. With two more performance levels to go, we can definitely say that the competition better watch out when they see Matt’s crazy-quick street truck in the other lane. UDBG

This Chevy has rocketed down the eighth-mile in 6.71 seconds at 109 mph.”

---

Build List

6.6L Duramax Engine:

• Carrillo Forged Connecting Rods
• PPE 15.5:1 Compression Ratio Pistons ARP Fasteners
• SoCal Diesel Performance Dampener SoCal Diesel 3388 Camshaft
• SoCal Diesel Valve Springs and Retainers
• Twin Fleece CP3K Modified CP3s (with help from ATS, PPE and HSP)
• Pushrods from Merchant Automotive
• Exergy Engineering 100-Percent Over Injectors
• Triple Turbo Setup: Single 75mm Fleece Turbo, with two 68mm Fleece Turbos
• Twin S&B Air Filters

Allison 1000 Transmission:

• Built by Fleece Performance
• Raybestos Clutches
• 2,800-rpm Sun Coast Torque Converter
• Custom Transmission Tuning from Fleece
• Fleece Performance Ally Locker

Suspension:

• Rancho 9000 Shocks
• CalTracs Traction Bars
• PPE Centerlink
• Fleece Performance Tie-Rod Sleeves
• 305/50R20 Nitto 420S Tires (street)
• 28×14.50×16 Hoosier Quicktime Pro’s (track)

Extras:

• Peffley Performance Rollcage
• ISSPRO gauges
• Pypes 7-inch Stack
• Bushwacker Fender Flares
• Goodmark Hood
• Yukon Grizzly Locker

---