Engine Build: 427 cid LSX Pro Touring Engine

Engine Build: 427 cid LSX Pro Touring Engine

Baier's Engine Service built this 427 cid LSX for a Pro Touring application. Find out what makes it special!

For Corey Herman, it wasn’t the cars themselves that drew him to this industry, but rather the many different kinds of machining processes he could perform on an engine. That interest in machining resulted in him attending a tech school and subsequently getting a job at Baier’s Engine Service in Rochester, MN.

“Just out of high school, I had some machining work done here at Baier’s Engine Service and I chatted with the boss about an internship after I went to tech school so I could work at the shop,” Herman says. “Fast forward nearly 30 years, I’m still here.”

Baier’s Engine Service, owned by Jim Baier, has been in business for more than 45 years. The three-employee shop does engine work for dirt modified, street stock, super stock, drag racing, truck and tractor pulling, and restoration applications.

“We’ve got three tracks that are fairly close, so we’ve always done quite a bit of the dirt modified work since the beginning,” he says. “While that is a large amount of what we do, we really cover everything. We very rarely turn jobs down. We work on a number of engine platforms, but we see mostly the regular small block Chevy, because that’s the legal stuff in the dirt world here. We see more and more LS stuff. We’ve done quite a few of them lately with the street car turbo stuff. We also do lot of restoration work on small block and big block Chevys, Fords and Oldsmobiles.”

Baier’s Engine Service is a full machine shop and has a dyno in-house as well. With all of these capabilities, the engine work possibilities are endless. One engine the shop recently finished up is a 427 cid LSX engine for a Pro Touring application.

“This engine is actually mine, and it’s one that we keep in the shop as a showroom piece,” Herman says. “It’s for a Pro Touring project.”

The build started with a brand-new GM LSX block that got machined on the shop’s RMC V30 CNC machine. This LSX is a 4.125˝ bore, 4.000˝ stroke deal.

“The engine has a Callies DragonSlayer crankshaft with Callies Ultra H-beam rods and RaceTec forged flat top pistons along with RHS LS7 heads, Manley valves, a COMP custom hydraulic roller camshaft, and COMP short travel lifters,” he says. “We used Clevite H bearings, Total Seal rings, a COMP timing set, PAC valve springs, Manley retainers, LS7 rocker arms with the COMP trunnion upgrade, Trend pushrods, and ARP main studs, head studs and bolts.”

The naturally aspirated LSX also got a Holley Sniper intake and Holley’s new Terminator X EFI system. The compression is set at 11.5:1 and it should make around 700 horsepower on pump gas, according to Herman.

“This build was pretty smooth,” he says. “If you pick the right stuff, then everything usually goes pretty smooth.”

We hope that smoothness translates to the track!

Engine Builder magazine’s Engine of the Week is sponsored by PennGrade Motor Oil and Elring – Das Original.

You May Also Like

ECM Damage

Engineers have devised two strategies that can be called the “immune system” for the electrical system.

With even the most basic vehicles having more than 10 modules connected to hundreds of circuits, there is always a possibility that wires can get crossed. Engineers want to prevent damage to wiring, circuit boards and sensors if something goes wrong that causes a short or open. To avoid damage and possible fires, engineers have devised two strategies that can be called the “immune system” for the electrical system.

Fuel Pumps and Cranking

Diagnosing the problem comes down to understanding what causes a loss of fuel pressure.

PCV System DTC

PCV systems control crankcase pressure.

A/C Condenser Clogs

When a compressor fails, the question for most technicians is whether to flush the condenser or replace it.

Checking The Auxiliary Water Pump

A car or truck comes into the shop with a complaint of poor heater performance. The issue may be the auxiliary water pump.

Tech holds up heater core

Other Posts

It’s Got Spark!

Why can’t you trust some spark tests?

Understanding Differences Between Aluminum And Cast Iron

Sheer material differences aside, what are the features and benefits of aluminum and iron engine components?

Diagnosing Misfires

What if there are no codes and a misfire is intermittent? This is where it gets complicated. 

Fuel Pressure Diagnostic Service

Use a scan tool that can look at special direct fuel injection parameters and perform bidirectional tests.