ENGINE SWAPS EXPLAINED: WHY GAMERS AND GEARHEADS LOVE THEM

The first time I saw an LS swap in person I thought somebody had made a mistake. It was in a Mazda Miata at a car show, hood propped up, and there was this giant aluminum V8 sitting where a tiny four cylinder used to live. The car was about the size of a shopping cart. The engine was the size of a shopping cart. The valve covers were basically touching the fenders. And the owner just stood there grinning like he had won something.

He had. Because that's what an engine swap is. You take a car the factory built to be one thing, you rip out its heart, and you bolt in the heart of something faster, meaner, or just plain weirder. Done right, a swap doesn't add horsepower. It doubles it. It triples it. It turns a car into a completely different animal with the same paint job. I think it's the purest expression of car modding there is, and I think it's also one of the most underused mechanics in games about cars.

Let me walk through the big ones.

The LS Swap: The People's Champion

If you've been on the internet and car people have been within shouting distance, you've heard the phrase "LS swap." It is a meme. It is a way of life. It is the answer to every question on every car forum, whether or not the question had anything to do with engines.

The LS is a family of V8 engines General Motors started building in 1997, originally for the C5 Corvette. Aluminum block. Pushrod valvetrain, which is old school. Compact external dimensions, which is the secret. An LS engine is physically smaller than most of the V8s that came before it, and it makes more power, gets better mileage, and runs forever. The factory LS1 made 345 horsepower. The LS3 made 430. The LS7 made 505. A supercharged LSA or LS9 makes stupid numbers.

Here's why the swap community fell in love with it. GM put this engine in everything. Corvettes. Camaros. Silverados. Tahoes. Escalades. You can walk into any junkyard in America and find an LS engine in the back of a crashed truck for eight hundred bucks. The truck version has more displacement, because it's a work engine, and truck LS motors are dirt cheap because nobody cares about a totaled Silverado the way they care about a totaled Corvette.

So you pull that engine out of the junkyard truck, you buy a set of swap mounts, you wire up the standalone harness, and you drop it into basically any car with an engine bay big enough to hold it. Miata. 240SX. E30 BMW. First gen Camaro where the original engine rotted out. Mid-engine Fiero project that nobody asked for. Boat. Lawnmower. Whatever.

The joke is that people will LS swap anything. The truth is they do it because the engine works. It's cheap. Parts are everywhere. It makes power. It fits. And compared to rebuilding whatever came in the car from the factory, it's often less money for triple the output.

For a hot rod shop sim this is the platonic ideal of a swap mission. Customer brings in a beater with a tired small displacement engine. You offer the LS path. You negotiate the price, order the junkyard core, pull the old engine, fabricate mounts, wire the harness, sort the cooling, handle the driveline, dyno it, and hand back a weapon. It's basically a whole campaign arc in a single repair ticket.

The Coyote Swap: Ford's Answer

Ford fans were watching the LS takeover and they were not having a good time. For years the Blue Oval side didn't have a direct modern V8 equivalent. The old 302 and 351 Windsors were great, but they were still pushrod engines from the seventies, and they didn't respond to modern tuning the way the LS did.

Then in 2011 Ford dropped the Coyote. Five liter, all aluminum, dual overhead cams, four valves per cylinder, variable valve timing. The Mustang GT started making 412 horsepower from the factory, and that number climbed with every generation. The current Coyote pushes close to five hundred stock, and supercharged or turbocharged it'll make whatever you want.

The Coyote swap is the Ford equivalent of an LS swap, and the target vehicles are exactly what you'd guess. Fox body Mustangs. 1969 Mach 1s. F100 pickups. Any old Ford that came with a 302 and deserves better. The appeal is the same as the LS. It's a modern engine with modern manners that makes modern power, and it fits into chassis that were designed around small block Fords decades ago.

The Coyote is trickier than an LS in some ways. It's physically larger because of the twin cam heads. The accessory drive takes up more space. The electronics are fussier. But if you want a modern Ford engine in a classic Ford body, this is the move. There's a whole cottage industry now of shops that sell pre-assembled Coyote swap kits with mounts, oil pans, wiring harnesses, and radiator adapters. Ford even sells crate Coyote engines with plug and play controllers so you don't have to hack apart a donor car.

A game mission built around a Coyote swap has a different flavor than an LS. It's the nostalgic one. The customer is putting a modern heart in grandpa's old Mustang. The storytelling writes itself.

The K-Series Swap: Honda's Secret Weapon

Not every swap is about putting a giant V8 in a small car. Sometimes the right move is to put a slightly better four cylinder in a much lighter four cylinder chassis, and the king of that category is the Honda K-series.

The K20 and K24 are Honda's 2.0 and 2.4 liter four cylinders. They started showing up in 2001 in the RSX Type-S and the Civic Si, and they made good numbers right out of the box. The K20A from the JDM Integra Type-R made 220 horsepower from two liters naturally aspirated, which in the early 2000s was absurd. The K24 came later with more displacement and massive torque potential.

The K-swap happens because older Honda chassis are lighter than newer ones and have better driving dynamics. A first gen CRX weighs less than a Miata. An EF Civic is a go-kart. An EG hatch is a favorite of the tuner world. All of them came from the factory with smaller, slower, single cam engines that were economy car motors, not sport motors.

You pull that out, you bolt in a K-series, and suddenly you have a two thousand pound car with two hundred horsepower that revs to nine grand. It's the recipe for a track day giant killer. These cars embarrass Porsches on autocross courses. They run mid twelves in the quarter mile on stock turbo setups. They get thirty miles per gallon on the way home from the track.

The K-swap is also interesting because the challenge isn't fabrication, it's finesse. The engines bolt in with readily available mount kits. The wiring is solvable. The hard part is making everything work right together. Throttle response. Shift quality. Cooling. Fuel delivery. A sloppy K-swap runs fine. A clean K-swap feels like a factory car that escaped from a better universe.

If you're new to engine builds generally and want to understand what's going on inside any of these engines before you start swapping them, I wrote a walkthrough that covers the whole bottom end to dyno process. A lot of that same thinking applies whether you're freshening up a 350 small block or a K24.

The 1JZ and 2JZ: The Toyota Legends

The 2JZ-GTE is the reason your cousin's friend thinks Supras make a thousand horsepower stock. They don't. But the engine can.

Toyota built the JZ family of inline sixes in the nineties. The 1JZ-GTE was 2.5 liters, twin turbo, about 280 horsepower from the factory. The 2JZ-GTE was 3 liters, twin turbo, 320 horsepower from the factory, and featured an iron block so overbuilt that the engines shrug off triple their factory output before the bottom end even notices. The legend goes that the 2JZ will make a thousand horsepower on stock internals. That's not quite true in the strictest sense, but it's closer to true than it has any right to be.

The JZ swap culture started with Supras and 300ZXs and quickly jumped species. People put 2JZs in Lexus SC400s, which is basically the same car with a different badge. Then BMW E36s. Then 240SXs. Then drift cars of every denomination. Then trucks. Then Ferraris, because somebody on YouTube had to. The iron block weighs a ton, so it's not ideal in a tiny chassis, but it's so tough that tuners learned to love it anyway.

The 1JZ is sometimes the better swap, especially in lighter cars, because it weighs less and still takes boost like a champ. It's often cheaper too, since the cult of 2JZ has pushed used engine prices into the stratosphere. A decent 2JZ longblock out of a junked Supra can cost ten grand now. In 2008 you could have bought the whole car for that.

A JZ swap mission in a game has a different texture than the American V8 swaps. This one is about boost. Turbo sizing. Manifold routing. Intercooler plumbing. Fuel system upgrades because the factory injectors top out early. The storytelling is different too. The customer isn't trying to recreate their grandfather's Mustang. They're trying to build something that can obliterate tire sidewalls on a Sunday morning.

The RB26: The Skyline Swap Nobody Can Afford Anymore

The RB26DETT lived in the Nissan Skyline GT-R from 1989 to 2002. Inline six. Twin turbo. Individual throttle bodies. All wheel drive. Factory rated at 276 horsepower, which was a polite lie because the Japanese automakers had a gentleman's agreement to under-report output. Real factory numbers were around 320. Tuned numbers go very, very high.

RB swaps have always been a flex. The engines were expensive when the Skyline was still illegal to import into the United States. Now the GT-R is legal in the US under the 25 year rule, and that has actually made the engines more expensive, because now there's a legitimate market for complete cars and the engines command a premium whether or not they're attached to a chassis.

People swap RBs into 240SXs, into Silvias, into whatever Nissan chassis will accept an inline six. Some folks put them in American cars just to be contrarians. The charm of the RB is the character. Individual throttle bodies make a sound you don't get from any other engine layout. Twin sequential turbos spool differently than a single turbo. The all wheel drive system in the donor car is a whole separate swap consideration in itself.

The RB is the prestige swap. It's not the most practical, it's not the cheapest, and the engines are getting harder to find every year. But if you want to pull up to a meet with something nobody else has, a clean RB swap does the job. In a shop sim, this is the legendary tier mission. The one where the customer is a collector with deep pockets and the build takes a whole chapter.

Why Swaps Matter

Here's the thing about engine swaps that most car games miss. A swap isn't an upgrade. It's a transformation. When you put an LS in a Miata, you're not just making the Miata faster. You're making a car that does not exist anywhere in nature. No factory built an LS powered Miata. You did. The thing you end up with is something nobody at any engineering office ever signed off on.

Same with a 2JZ in a 240SX. Same with a K24 in a CRX. Same with a Coyote in a Fox body. Every one of these is a vehicle that's half factory, half garage, and completely personal. The swap is the mod that rewrites what the car is.

Most games simplify car modding into a tier system. Buy stage one. Unlock stage two. This gives you more numbers but it doesn't change anything about what the car is. A sim that actually modeled engine swaps would be different. It would have to simulate physical fitment. Engine weight affecting handling balance. Torque curves changing how the car accelerates in each gear. Sound design that shifts from factory four cylinder to American V8 rumble to inline six boost whoosh depending on what you dropped in.

That's a much harder game to build. It's also a much better one. If you've played anything that dabbled in this, you've felt the appeal. My Garage does a little of it. Car Mechanic Simulator hints at it. But nothing on the market today really commits to the swap as the gameplay centerpiece it could be.

The Swap as a Milestone

In any garage game worth playing, the early hours should be basic stuff. Oil changes. Brake jobs. Tune ups. The stuff a first year tech does. Then you grow. You start taking on bigger work. You rebuild an engine from scratch, which is its own arc. And then, eventually, you unlock the swap bay. That's where the game gets weird and great. That's where a customer rolls in with a tired NA and you ask them how they feel about a V8.

The swap should be a multi-day project. You have to source the donor engine, which means haggling at junkyards or ordering a crate. You have to fabricate mounts, which might involve minigames for cutting and welding. You have to route the wiring, plumb the fuel system, sort the cooling, redo the driveline to handle the new torque. Each step has failure modes. Each step has shortcuts that save money now and cost you later.

When it fires for the first time on your dyno, you feel it. Because you did all of that. The car that leaves your shop is not the car that came in. It's something else. It's the real reason people get into this hobby in the first place.

For more on the engines that started this whole culture, I wrote about how a flathead V8 works, which is the ancestor of all the swap philosophy we're talking about here. The flathead was the original people's V8. Everything else came after.

Until somebody builds the swap-focused shop sim of my dreams, I'll keep watching build threads, keep staring at engine bays at car shows, and keep pretending the Miata in my driveway would be better with a V8 in it. It would be. Don't let anyone tell you otherwise.