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Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Katech’s 2.7-liter billet inline-four makes roughly 375 to 400-plus horsepower naturally aspirated—not because it uses a hidden turbocharger, but because it combines a huge bore, high compression, methanol fuel, mechanical injection, aggressive race hardware, and very high rpm. It is an extraordinary competition engine developed primarily for midget racing, not a normal crate engine or an easy street-car swap.
Katech’s 2.7-liter billet inline-four makes roughly 375 to 400-plus horsepower naturally aspirated—not because it uses a hidden turbocharger, but because it combines a huge bore, high compression, methanol fuel, mechanical injection, aggressive race hardware, and very high rpm. It is an extraordinary competition engine developed primarily for midget racing, not a normal crate engine or an easy street-car swap.
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The concept is unusual even before the power figure: Katech adapted the basic architecture of the modern GM Gen V LT V8 into a compact four-cylinder. The engine keeps the LT family’s 4.4-inch bore spacing and pushrod, single-cam layout, but uses a completely redesigned billet-aluminum inline-four block.
Katech 2.7L billet four-cylinder: the verified figures
| Specification | Reported detail |
|---|---|
| Configuration | Inline four-cylinder, pushrod, single overhead camshaft-in-block layout |
| Displacement | Approximately 2.7 liters, or 165 cubic inches |
| Bore | 4.125 inches, or 105 mm |
| Stroke | 3.085 inches, or 78 mm |
| Induction | Naturally aspirated |
| Fuel | Methanol |
| Injection | Mechanical port fuel injection in the reported initial configuration |
| Compression ratio | 14:1, according to development reporting |
| Power | 375 hp reported by Performance Racing Industry; more than 400 hp reported by The Drive |
| Reported test speed | Limited to 8,600 rpm during testing, with testing reportedly reaching 9,500 rpm |
| Weight | 168 pounds, as reported by Performance Racing Industry |
| Oil system | Purpose-built dry sump |
| Primary use | USAC, Xtreme Outlaw, and POWRi midget racing |
The horsepower figures should not be treated as contradictory dyno-test results for one fixed production specification. They appear to describe different development points or configurations. The careful summary is therefore about 375 to 400-plus horsepower on methanol, with the exact number dependent on specification, dyno setup, and development status.
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How a naturally aspirated 2.7-liter engine reaches 400 horsepower
A naturally aspirated engine has to fill its cylinders with air using atmospheric pressure alone. Without a turbocharger or supercharger to force in additional air, power comes from maximizing airflow, compression, combustion efficiency, rpm, and the amount of fuel the engine can burn.
1. A very large bore and relatively short stroke
The 4.125-inch bore is enormous for a four-cylinder engine, while the 3.085-inch stroke is comparatively short. Together, those dimensions produce approximately 165 cubic inches of displacement while keeping the engine’s stroke suitable for high rotational speed.
The large bore provides room for large valves and an efficient high-flow cylinder-head layout. It also reduces the distance flame travel must cover across the combustion chamber compared with a smaller-bore design at the same displacement. The short stroke helps control piston speed and allows the engine to operate at racing rpm without the piston traveling as far on every revolution.
This is not a recipe aimed at low-rpm torque, fuel economy, or long road-car service intervals. It is a recipe for moving a great deal of air through a small, light engine at high speed.
2. High compression and methanol fuel
The reported 14:1 compression ratio is far beyond what most pump-gas street engines can use without careful fuel, calibration, and knock control. Katech’s configuration was designed around methanol, a fuel commonly used in this type of racing.
Methanol’s characteristics make it useful in a high-compression competition engine, but that does not mean the engine is a practical pump-gas conversion. Fuel choice affects compression, mixture volume, fuel-system sizing, calibration, lubrication concerns, cold starting, and operating procedures. The available reporting does not establish that this engine is intended to run on ordinary gasoline, nor does it provide a street-fuel calibration.
3. Race-oriented cylinder heads and valvetrain
The engine uses a CNC-machined, high-performance cylinder head derived from the LT family’s pushrod architecture. Its reported valvetrain includes a solid roller-bearing camshaft, Jesel lifters, T&D shaft rockers, titanium valves, and PAC coil springs.
Those parts are important because naturally aspirated power depends on maintaining stable valve motion while the engine spins rapidly. A competition valvetrain must open the valves far enough and long enough to support airflow, then close them accurately without valve float. Titanium valves reduce reciprocating mass, while shaft-mounted rockers can provide a rigid and consistent rocker system compared with a conventional stud-mounted arrangement.
The published information does not include the complete camshaft specification, valve diameters, cylinder-head flow numbers, combustion-chamber drawing, or ignition details. Those missing numbers matter when comparing this engine with other naturally aspirated four-cylinders, so they should not be guessed from the horsepower claim.
4. Mechanical port fuel injection
The initial engine configuration reportedly uses mechanical port fuel injection rather than the direct-injection system associated with production LT engines. The system is specialized competition hardware, with fuel delivered near the intake ports and metered mechanically.
Kinsler’s technical material covers four-cylinder mechanical-injection components such as modular throttle bodies, individual-throttle-body arrangements, nozzles, fuel rails, and related hardware. That supports describing the reported installation as a specialized Kinsler-style mechanical or port-injection system, but it does not establish a public consumer part number or a complete bill of materials for every Katech engine.
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The LT-based head was reportedly designed with the possibility of future direct injection, and the block provides for one or two camshaft-driven high-pressure fuel pumps. That is an indication of forward-looking flexibility in the architecture—not evidence that the initial engine uses production-style direct injection.
Why the engine is an inline four despite its LT V8 roots
Calling the engine “half an LT V8” is useful as a shorthand, but it should not be interpreted as a production V8 cut in half. Katech retained the LT family’s 4.4-inch bore spacing and pushrod layout while designing a new billet block around four cylinders in an inline arrangement.
The result preserves some of the LT concept’s compact valvetrain packaging while creating a narrow, lightweight engine suited to a specialized race car. A four-cylinder also avoids the length and mass of a complete V8, while the large displacement for the cylinder count helps produce the airflow and power needed for midget competition.
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The 45-degree lean is a feature, not an accident
The billet block has an inherent 45-degree lean. In a normal road car, an engine’s tilt is usually dictated by packaging, intake and exhaust clearance, driveshaft alignment, and hood height. In a dirt-track midget, the angle can serve the handling objective directly.
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Outbyte PC Repair FREERepair Windows errors before they cause bigger problemsFix Now →Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Tilting the engine moves mass toward the left side of the car. That can help the car turn in on a dirt oval, where cornering behavior and weight distribution are central to performance. The engine’s geometry therefore makes more sense when viewed as part of a complete midget-racing package rather than as an isolated attempt to build the most convenient four-cylinder for a road vehicle.
Billet aluminum block and dry-sump oiling
The block is machined from billet aluminum and includes provision for water jackets. Billet construction gives an engine designer considerable freedom to create a purpose-built architecture, but it also signals a low-volume competition product rather than an inexpensive mass-produced replacement engine.
The reported 168-pound weight is one of the engine’s most striking numbers. That figure must be interpreted in the context of the published configuration and what is included in the measurement; it should not automatically be compared with a fully dressed production engine, a long-block, or another manufacturer’s package weight without checking the same measurement standard.
Katech also developed a bespoke dry-sump oil pan and oiling system. A dry sump stores oil in a separate tank rather than relying on a deep pan beneath the crankshaft. In racing, that arrangement helps control oil during sustained cornering, braking, acceleration, and high-rpm operation. It can also allow the engine to sit lower because the pan does not need to be as deep.
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The available reports do not specify the pump model, tank capacity, oil-pressure target, or complete plumbing layout. Those details are essential for anyone designing an installation and are not interchangeable assumptions from an ordinary wet-sump engine.
Where the engine is meant to race
Katech targeted the engine at USAC, Xtreme Outlaw, and POWRi midget competition. That application explains nearly every unusual design choice:
- Low mass: A reported 168-pound engine helps the car meet weight and balance objectives.
- 45-degree lean: The angle shifts mass toward the left side for dirt-track handling.
- Methanol and high compression: The fuel and compression combination supports competition power.
- Dry-sump oiling: The system is designed for racing loads and sustained high engine speed.
- High-rpm valvetrain: Solid rollers, shaft rockers, titanium valves, and race springs support aggressive valve control.
- Compact inline-four format: The package provides substantial power without the size of a complete V8.
The engine has also been described as adaptable to autocross, time attack, track-day, and other competition applications. “Adaptable” does not mean street legal, emissions compliant, inexpensive, warrantied, or suitable for a casual engine swap. Installation would require compatible engine mounts, exhaust, cooling, fuel delivery, dry-sump plumbing, electronics or mechanical controls, drivetrain components, and race-organization approval.
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Is this a street-car engine or a crate engine?
No—not in the ordinary meaning of either term. The available research describes a purpose-built competition engine intended primarily for midgets. There is no verified public retail price, production volume, warranty, street-legal certification, complete dyno chart, torque curve, fuel-consumption figure, or service interval.
Nor is there evidence that a complete Katech engine is routinely stocked as a consumer product through a general marketplace. Its specialized billet construction, methanol fuel system, dry sump, high compression, and race valvetrain all point toward a builder-supported competition package rather than a plug-and-play street-car powerplant.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.What the 400-hp headline gets right—and leaves out
The headline is directionally accurate: a report from The Drive described the engine as making more than 400 horsepower, while Performance Racing Industry reported 375 hp on methanol. But “400 hp” alone hides the conditions behind the number.
This is approximately 2.7 liters producing race-engine power with:
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1Repair Windows errors before they cause bigger problems2Fix the driver behind crashes, sound loss and screen glitches3Clear out junk files and repair common Windows errors- 14:1 compression, according to reported development specifications;
- methanol rather than ordinary pump gasoline;
- mechanical port fuel injection;
- a high-flow CNC-machined cylinder head;
- a solid roller valvetrain with lightweight titanium valves;
- operation at very high rpm; and
- a dry-sump racing oil system.
In other words, the achievement is not that a normal 2.7-liter street engine somehow produces 400 hp with no boost. The achievement is that Katech created an unusually light, compact, naturally aspirated competition engine and optimized every major subsystem for racing.
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What remains unknown
Several specifications have not been established by the available reporting. They include the final production camshaft profile, valve sizes, cylinder-head flow data, torque curve, ignition system, exact fuel-system components, dry-sump pump and tank details, service intervals, price, production quantity, warranty, and current ordering status.
Those omissions are important for prospective racers. Horsepower alone cannot determine whether an engine is legal for a particular sanctioning body or compatible with a particular chassis. Rules, minimum weights, fuel regulations, engine dimensions, maintenance requirements, and parts availability would all need to be confirmed directly with Katech and the relevant racing organization.
Bottom line
Katech’s 2.7-liter billet inline-four is best understood as a lightweight, naturally aspirated midget-racing engine built around a highly modified LT-family concept. Its approximately 375-to-400-plus horsepower comes from displacement per cylinder, large-bore airflow, 14:1 compression, methanol, mechanical injection, aggressive valvetrain hardware, and high rpm—not forced induction.
It is a remarkable specialist race engine. It is not evidence that a 400-hp, pump-gas, street-friendly four-cylinder crate engine is waiting for a simple engine-swap installation.
Frequently Asked Questions
Does the Katech 2.7L four-cylinder use a turbocharger?
No. The reported configuration is naturally aspirated and uses no turbocharger or supercharger. Its power comes from high compression, methanol, mechanical port injection, aggressive cylinder-head and valvetrain hardware, and high rpm.
How much horsepower does the Katech 2.7L billet four-cylinder make?
Performance Racing Industry reported 375 hp on methanol, while The Drive reported more than 400 hp. Those figures likely represent different development stages or specifications, so the most careful description is approximately 375 to 400-plus horsepower.
Can you install this engine in a street car?
It was developed primarily for USAC, Xtreme Outlaw, and POWRi midget racing. It may be adaptable to other competition uses, but it should not be assumed to be street legal, emissions compliant, warrantied, or suitable for a casual engine swap.
What fuel and injection system does the engine use?
The reported initial configuration uses mechanical port fuel injection and methanol. The LT-based head was designed with possible future direct injection in mind, and the block reportedly provides for one or two camshaft-driven high-pressure fuel pumps.
The Bottom Line
Bottom line: Katech’s 2.7-liter billet inline-four makes roughly 375 to 400-plus naturally aspirated horsepower on methanol by combining a 4.125-inch bore, 3.085-inch stroke, high compression, mechanical injection, race valvetrain hardware, and high-rpm operation. Its 168-pound reported weight and 45-degree lean are optimized for midget racing, so it should be treated as a specialized competition engine—not a street-legal or plug-and-play crate motor.
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