Turbocharged Billet K24 Honda Engine - Engine Builder Magazine

Turbocharged Billet K24 Honda Engine

Noonan Race Engineering is well-known for its V8 engine platforms, but the shop has now dipped its toe into the 4-cylinder world with a billet K24 Honda engine. The objective – huge horsepower, while keeping factory creature comforts. Check it out!

Engine of the Week is presented by

In 2023, we got the chance to showcase a lot of what Noonan Race Engineering has going on inside its state-of-the-art engine and machine shop located in Spartanburg, SC. The shop was named our 2023 America’s Best Engine Shop in the Race category, and we gave people a full shop tour video of the facility, as well as showcased Noonan’s popular V8 Hemi platforms in a couple Engine of the Week features.

However, if we’ve learned anything during our time with shop owners Jamie and Renee Noonan, it’s that they’re never satisfied with the status quo, nor will they rest on their laurels, allowing others to catch up. They push the envelope all the time, and Noonan’s newest R&D efforts have been focused on the 4-cylinder world – specifically a Honda K24 engine platform. Noonan brought one of its first, completed, billet K24 Honda engine builds to the 2023 PRI Show, and we caught up with Barry Pettit to get the full rundown.

“This is our new Honda K24 block,” Pettit says. “It’s a full billet block that we’ve produced in-house. The K24 is the taller deck height. This engine was actually pulled straight off of the dyno from testing to bring it here – it’s still on the dyno cart. We did many, many runs and are currently at 1,200 horsepower, but expect to be at 1,800 horsepower pretty easy.”

As mentioned, the Honda and four-cylinder stuff is new for Noonan, but it gives the shop yet another segment of the engine building and racing world to explore.

“We’re typically known for the V8 stuff, but here lately we’ve been expanding our offerings with the Lamborghini V10, the Porsche six cylinder, the big block Chevy stuff we’re doing private label, so we really just want to expand,” Pettit explains. “We’ve had a lot of customers talk to us about the billet Hondas and they’re making big power. If you look at pounds per cubic inch or pounds per cc, it’s very impressive. We’re all about making big power, so we figured we’d take a swing at it, but it’s something fun that we’ve really enjoyed manufacturing. We look at making a lot more of them.”

As of now, Noonan’s K series Honda engine will be offered in both a wet or dry configuration, and the shop also plans to sell a B series Honda soon.

“This particular K24 is wet, so we were running water while on the dyno,” he says. “Temperatures never went over 100 degrees F. It was very happy and that’s doing several 1,100-horsepower pulls back-to-back, so it worked really well. This has our standard sleeve-style of machining that we do in all of our stuff from LS to the Lamborghini – it’s the same concept applied to this block.”

While the block was machined entirely in-house at Noonan Race Engineering, the rest of the engine build features parts from numerous aftermarket manufacturers, as well as a partnership with Drag Cartel, which is showcased in components such as the cylinder head, the valvetrain and several auxillary components and engine covers. Additional components include a Brian Crower 99mm stroke crankshaft, MGP billet rods, Wiseco pistons, and a new turbo from HPT.

“There’s a lot of features in here that people don’t really know about,” Pettit says. “In terms of crank clearance, you can run a 99mm stroke with an aluminum rod, which is what’s in this engine, or you could go to 106mm if you run a steel rod. This does have 1/2” head studs, 7/16ths main studs, and it can accept a factory stud with some negotiations. We did do dowels for the cylinder heads to where it’ll line up and hold properly. It’s just a great piece. It was a pleasure to build, and it’s performed extremely well.”

For fueling, the K24 Honda utilizes a dual injector per cylinder setup. When Noonan dyno tested the engine, Pettit says they were running it solely off of the FuelTech 720s and it did extremely well. For oiling, Noonan made sure to accommodate the factory oil locations. It has an OE Honda filter on the side of it too, if you want. This setup allowed for both good oil pressure and oil temps, according to Pettit.

“The big part of this for us was a lot of the products out there didn’t allow customers to run either their same engine mounts, some of the same oil filters and OE-type stuff,” he says. “Our main objective with our block was to offer a platform for huge horsepower, but still have some of those factory creature comforts – water-cooled, the right fit, and all that kind of stuff.”

As mentioned earlier, HPT came out with a new turbo that they let Noonan use to test it and the K24 Honda build. Pettit and the Noonan team came away impressed, and saw 50-lbs. of boost during the first dyno sessions.

“We’re still early in testing,” he says. “We saw 50-lbs., but we weren’t using it correctly. We are still learning how this thing wants to work and we’ve been working with Haltech on some of their new software, so there’s a lot of learning going on, but this thing didn’t even sweat at 50-lbs. When we hit the 1,200 hp number, we were at 40-lbs.”

Barry told us that 1,800 horsepower could be expected out of this engine, and it would likely require upwards of 50-lbs. of boost to get there and going beyond the 8,500-rpm rev range Noonan was initially keeping to during testing.

“We still have a lot of room left,” he says. “This will be a great engine for a lot of the front-wheel-drive drag racing classes, and we’ve had a bunch of time attack guys interested. This is a great, lightweight, small solution that you can still run 800-900 horsepower with consistently. The K series is such a great platform and the parts are so off-the-shelf that it really can go in about anything.”

All we know is there’s no debating this billet K24 Honda engine is gorgeous and stands to make a ton of power. For Noonan Race Engineering, this is just the tip of the Honda iceberg!

Engine of the Week is sponsored by PennGrade1Elring – 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

ProCharged 5.000” Bore Space Billet Big Block Chevy Engine

One of the first 5.000″ bore space big block Chevy engines that Visner Engine Development has come out with in this new design, this billet engine was built by Nick Bacalis of Bullet Racing Engines for a 1971 C10 belonging to Michael Rieck. Check out what 4,000-plus horsepower looks like!

billet big block Chevy engine

When the topic is high-quality, high-horsepower, high-performance engines, Bullet Racing Engines is a shop that’s always in the conversation. It also doesn’t hurt that the House Springs, MO-based engine and machine shop is affiliated with Larry Jeffers Race Cars (LJRC), which is well-known for building amazing race cars and chassis. Head engine builder, Nick Bacalis, is always churning out impressive engine builds, and as such, we caught up with Nick at the 2023 PRI show to talk through a ProCharged 5.000” bore space billet big block Chevy engine he had built that was on display inside Michael Rieck’s 1971 C10 truck.

3,500+ HP 427 cid Billet LS Engine

At ACE Racing Engines, Stefan Rossi’s and Laura Pugh’s hard work has been paying off in the form of increased awareness and business, a new shop space out in California, and best of all, success on the track from numerous customers. Check out this excellent example of a maximum effort, billet LS engine for a drag-and-drive application.

Supercharged 388 cid LS Engine

Hoping to reach new heights in the mile, this Cadillac customer brought his car and engine in for the School of Automotive Machinists & Technology to work their magic on. See what went into the supercharged LS engine platform.

Cadillac Supercharged LS engine
Supercharged 521 cid Brad Anderson Hemi Engine

Amanda Hoover and Eddie Rogers have been campaigning their Chevelle from Hell for nearly a decade. Helping give the car its name is a screw-blown 521 cubic inch Hemi engine. Check out the details of this build done by Chris Duncan Race Cars!

408 cid Nitrous LS Engine

During a tour of SAM Tech, we also got a chance to speak to a few students. One in particular, Jaylon Victorian, was nearing completion of a 408 cid nitrous LS engine. He applied his new engine building knowledge and skill set to the build, and it shines through in our latest Engine of the Week.

408 cid nitrous LS engine

Other Posts

Matt Stutzman’s 540 cid Supercharged Big Block Chevy Engine

We got a chance to spend significant time with Matt Stutzman during the 2023 PRI Show. He’s a Paralympic archer born without arms who’s now setting his sights on Top Sportsman drag racing. We caught up with him in the PennGrade1/DA Lubricants booth to get the details of his 540 cid big block Chevy engine,

Compound Turbocharged 6.0L Powerstroke Engine

Eric McMichael of McMichael’s Diesel Performance is a Ford guy through and through. His passion for the Blue Oval shines bright in his 2004 F-250, which features a compound-turbo 6.0L Powerstroke engine. Check it oit!

Wagler’s New Billet Duramax for Drag-and-Drive

Jeremy Wagler and his team at Wagler Competition Products have become well-known for their diesel work, and specifically the shop’s enhancements for Duramax engines. Well, Jeremy and his team have taken another step forward by introducing an all-billet Duramax geared for drag-and-drive competition. We caught up with Jeremy at PRI 2023 to get the full

Demon Motorsports’ Turbocharged Toyota 2JZ Engine

It was hard not to noticed Damon Elff’s Toyota Supra and its turbocharged 2JZ engine during Sick Week 2024 as it was basically the only Supra there, and the 2JZ made some wicked sounds at the start line. We got a chance to speak with Damon, who owns Demon Motorsports, about his Supra/2JZ combo and