Twin-Turbo 427 cid LS Engine - Engine Builder Magazine

Twin-Turbo 427 cid LS Engine

Somewhere in the range of 1,500-1,700 horsepower, this LS-powered '68 Chevelle made a new personal best pass for owner Tanner Stover at Sick Week this year. Check it out!

Engine of the Week is presented by

One of the most cathartic experiences humans have when growing up is getting their first paycheck. It’s a strong feeling of freedom and self-government when you no longer have to rely on your parents financially, and a lot of people even remember the first purchase they made with that initial “adult” paycheck.

For gearheads, that often means a new car or accessory to a car, and for Tanner Stover it was no different. At Sick Week 2023, Stover was one of the younger drivers we saw out at the track, and we were curious to know the story behind the “Tanner’s Paycheck” sticker plastered on the side of his 1968 Chevrolet Chevelle.

“Pretty much throughout my younger years, I grew up on the racetrack with my dad,” Stover says. “Our local track ended up closing down so we got into off-road racing, but then eventually started drag racing again.

“We looked long and hard for this car and flew from California to Indiana to purchase it and then ship it back. We’ve put a ton of time into it over the last 10 years and my dad was mostly supporting the racing program while I was going to mechanical engineering school. Once I graduated and was able to start affording my own stuff, it started being my paycheck that went into the car so that’s where the name came from.”

And quite a few paychecks have gone into this build, as it’s much more than just a pretty car. Stover’s Chevelle is powered by a 427 cid LS engine, complete with a twin-turbo setup that’s fairly new for the father-son pair.

The twin 80mm Forced Performance chargers allow for Stover to make around 30-lbs. of boost on the top end, which helped him to make a personal best time of 7.75 seconds at 172 mph during Sick Week. Before the turbos, Stover was simply blasting the engine with nitrous – nearly 800 horsepower worth per pass. But, that inevitably resulted in more than a few sets of pistons giving out.

Luckily, Stover’s new setup has stood the test of time and continues to put out a ton of power while maintaining reliability. He says that the car is “purpose built” to be a drag-and-drive car, and the past few years of building has produced a machine that’s a tribute to the fun factor of drag-and-drive events. He says the LS engine is making somewhere along the lines of 1,500-1,700 horsepower currently, but it’s built to be capable of up to around 2,100 horsepower with everything maxed out.

“It’s a 427 LS with a Dart iron block,” he says. “It’s got Frankenstein F310 heads and a Callies crank, Callies I-beam rods, and JE pistons. The cylinder heads have top fuel hoops in them so we run a copper head gasket, that way we can give it all the boost.

“It has a dual-fuel system on it, so when we’re racing, we run off methanol. We use our 700 lb.-per-hour atomized fuel injectors and then it has the pump gas system. The methanol has a mechanical pump up front, and we’ve got a nice big 20-gallon tank in the back for the long drives.”

Tanner competed in Sick Week in the Modified class and recorded passes of 7.99 at 170 mph, 7.89 at 171 mph, 7.79 at 174 mph, 7.76 at 173 mph, and 7.75 at 172 mph for an average of 7.83 at 172 mph.

Engine of the Week is sponsored by PennGrade Motor OilElring – Das Original and NPW Companies. If you have an engine you’d like to highlight in this series, please email Engine Builder Editor Greg Jones at [email protected].

You May Also Like

2,662cc Air-Cooled and Turbocharged VW Engine

This 1969 Volkswagen Beetle was just $600 when Steve Dalton bought it in high school. Having tweaked the performance of the car every year, he’s gone way past that mark and several iterations of the VW engine. Today, it’s a 2,662cc air-cooled and turbo’d VW with a bunch of aftermarket goodies.

There’s just something inherently awesome about seeing a Volkswagen Beetle wheelie off the line at a dragstrip. It’s even cooler when you know the engine making it happen is also a VW and not some sort of swap. We caught up with Steve Dalton, the owner of such a Beetle, during Sick Week 2024. His air-cooled and turbocharged Volkswagen engine competes against a sea of V8 horsepower, and it holds its own, so we wanted to know how the 1969 Beetle and the VW engine got to this point.

Volkswagen Beetle’s Air-Cooled and Turbocharged Engine

This Volkswagen Beetle cost owner Steve Dalton $600 when he bought it back in high school for use as a daily driver. Every year since he’s owned the car, the Beetle and its engine have gotten some sort of performance upgrade to the point that it is at now. Steve is a regular on the

ProCharged 572 cid Big Block Chevy Engine

Inspired to build a hot rod with all its systems exposed, Leroy Edwards used his 50 years of mechanic experience to build this cool-looking car himself. Powering this hot rod is a ProCharged 572 cid big block Chevy engine with nitrous adding an extra kick. Check it out!

big block Chevy engine
Twin-Turbo 6.4L Gen III Hemi Engine

After rebuilding his ‘Lil Red Express truck for the past two years following a collision during the Midwest Drags, Rick Russell got back to drag-and-drive competition at Sick Week 2024. This time, ‘Lil Red Express featured a twin-turbo 6.4L Gen III Hemi engine!

Lil Red Express
All-Billet K24 2.2L Honda Engine

We’ve known JBR Engines owner Jose Bello for a few years, and well before that, we knew his shop was one of the premier shops in the Honda and import engine scene. During a recent visit, we got to see an all-billet Honda K24 2.2L engine coming together for a customer looking to improve upon his 5.86-second quarter mile time!

Other Posts
Troubleshooting Turbos

When it comes to turbos let’s examine three common causes of insufficient boost and how to get back to peak performance.

turbochargers
The 2025 NHRA Mission Foods Drag Racing Schedule

In all, the 2025 NHRA Mission Foods Drag Racing Series schedule currently includes 20 races at standout facilities across the country.

Turbocharged Nissan SR20 DET Engine

For a number of years now, Derek and Rita Cho-Sam of DRZA Auto in Tavares, FL have been among our top Nissan engine shops. When we realized that Sick Week would be rolling through their part of Florida, we made arrangements to stop by and see DRZA in person. Derek and Rita gave us a

Nissan SR20 DET engine
When the Industry Comes Together

It’s been said many times and in many ways – this industry of ours is tough to beat – especially when tragedy strikes.