502 cid LS Engine - Engine Builder Magazine

502 cid LS Engine

With a love for building naturally aspirated engines, Ramiro Ramirez of Fatboys Racing Engines built this 502 cid LS engine for a Chevy Silverado single cab truck. Find out what went into the build and how much horsepower the engine can crank out!

Engine of the Week is presented by

Growing up with his eyes glued to automotive magazines, as so many of us did, Ramiro Ramirez knew he wanted a career dealing with high-performance engines. Inspired by Sonny Leonard of Sonny’s Racing Engines, Andy Jensen of Jensen’s Engine Technologies and Steve Morris of Steve Morris Engines, Ramiro began his journey to learning how to build engines.

Today, his business, Fatboys Racing Engines located in Monterrey, Nuevo Leon, Mexico, has been building engines for 16 years. With a focus on naturally aspirated engines and nitrous engines, Fatboys has recently started to offer forced induction builds as well. The shop’s engine builds are most commonly used for street/strip, drag racing and sand drag applications.

One of the shop’s engine builds is a 502 cid LS engine for a street/strip application that the shop put into a 2010 Chevy Silverado single cab truck.

“It’s for daily use and the track,” Ramirez says. “I like to go fast on weekends with friends and family.”

The engine build started with an RHS aluminum tall-deck block that features a 4.170˝ bore and a 4.600˝ stroke.

The heads for the LS build are Mast Black Label 305s. Fatboys Racing Engines used a Jesel valvetrain, a solid roller Cam Motion camshaft with low lash, a Marcella Manifolds intake, and a Nick Williams 112 mm throttle body.

Other parts in the LS build are a billet crankshaft, I-beam connecting rods, Wiseco coated pistons, Clevite coated main and rod bearings, a Melling high-pressure oil pump, a single timing chain, ARP hardware, an ATI super damper, Fuel Injector Clinic injectors, and Bow Tie valve covers.

“The modifications that have helped me a lot are the camshaft by Cam Motion and the cylinder head porting and polishing done by Greg Good in Houston,” Ramirez says.

With the engine all buttoned up, Ramiro says the final product boasts a 12.5:1 compression and cranks out 870 horsepower and 700 ft.-lbs. of torque at 7,100 rpm. Time for a fun day at the track!

Engine of the Week is sponsored by PennGrade Motor OilElring – Das Original and Scat Crankshafts. 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

118mm Turbocharged 540 cid Big Block Chevy Engine

These days, a 200+ mph pass at a drag-and-drive event like Sick Week, is commonplace. However, it’s not every race you watch a competitor’s doors literally get blown off. Stefan Gustafsson did just that while running a PR of 6.43 at 218 mph thanks to his C4 Corvette and its turbocharged 540 cid big block Chevy engine. See what’s in this 2,100+ horsepower engine!

During last year’s 2022 Sick Week event, we had heard Stefan Gustafsson’s name and knew the Swede was making a strong run at the overall victory. Unfortunately, the stars never aligned for us to grab any time with him that year. This year, for the 2023 edition of the drag-and-drive event, we weren’t leaving until we got a chance to speak to the 2022 champion about his 1989 C4 Corvette and its turbocharged 540 cubic inch big block Chevy engine.

Twin-Turbo 400 cid LS Next Engine

Achieving five consecutive days of mid-6-second passes and 1,000 miles driven on the street earned Michael Westberg the 2023 Sick Week overall win. His Chevy S10 features a 400 cubic inch twin-turbo LS Next engine. See what’s in this engine build done by ACE Racing Engines!

Turbocharged 388 cid LS-Swapped 1973 Toyota Celica

Proof that cars from the ’70s were awesome is Steve Groenink’s 1973 Toyota Celica. Saved from a farmer’s field, this Celica features a turbocharged 388 cid LS engine capable of 6-second passes. Check it out!

Twin-Turbo 429 cid Ford Boss Engine

Earl Schexnayder of Schexnayder Racing is a Ford guy through and through. As such, he has been entering drag-and-drive events with his 2000 Cobra Mustang and a twin-turbo 429 Ford Boss engine since 2011. Check out what makes this Ford combo a sweet one!

Twin-Turbo 5.0L Coyote Engine

Brett LaSala’s first ever Sick Week in his 2012 Mustang named Snot Rocket was a huge success thanks to a new personal best ET, a class win in Modified, 3rd place overall and ‘Quickest Ford’ honors. It’s all thanks to a 2,500-horsepower, twin-turbo, 5.0L Coyote engine built by Fast Forward Race Engines. Check it out!

Other Posts

Jason Sack’s Turbocharged 429 cid LSX Engine

Jason Sack had arguably one of the nicest Novas we saw during Sick Week 2023. The car’s beauty had some sort of gravitational pull as we walked passed it in the pits. Naturally, we gave in and stopped to have a chat with Jason Sack about his 1969 Nova and its turbocharged 429 cid LSX

1968 Chevelle with a Twin-Turbo 427 cid LS Engine

This 1968 Chevelle, owned by Tanner Stover, was thought out from the beginning to handle drag-and-drive competitions, and no detail was left undone. The gorgeous car features a twin-turbo 427 cubic inch LS engine capable of running 7-second passes! It’s our Engine of the Week! Related Articles – Mild vs. Wild (Diesel Edition) Ep 5

Kyle Morris’ Twin-Turbo Small Block Ford Engine

As Steve Morris’ son, Kyle Morris is no stranger to engine work and drag racing from his seat at Steve Morris Engines. This 1996 Mustang was purchased by Kyle at the age of 15, and he now has it ready to rip 7- and 8-second 1/4-mile passes thanks to an 1,800-horsepower, twin-turbo small block Ford

Tina Pierce’s Twin-Turbo 509 cid Big Block Chevy Engine

Striving to make 200-mph passes during Sick Week, we came away impressed by Tina Pierce and her Chevy II Nova, which features a twin-turbo 509 cubic inch big block Chevy engine. The race veteran was attending her first Sick Week and we got the details of her drag-and-drive setup in this episode of Engine of