Toyota GR Corolla Crate Engine Coming With F1 Tech And Bigger Displacement

World-renowned tuner of Japanese sports cars HKS has announced a new crate engine program for the Toyota GR Corolla. According to The Drive, HKS has modified a G16E-GTS engine with several fascinating upgrades, boring and stroking the 1.6-liter three-cylinder motor in several ways to improve torque, efficiency, and power. As a reminder, the turbocharged mill in a standard GR Corolla produces 300 horsepower and 273 lb-ft of torque. With some basic ECU tuning (typically using a piggyback system), an aftermarket intake, a larger, less restrictive downpipe and exhaust system, and a couple of cooling and fueling upgrades, this engine can exceed 740 hp without beefier internals.

Supercar Technology From The World Of Motorsport

The Nettuno V6 from the MC20 supercar introduced so-called Maserati Twin Combustion, a form of pre-chamber combustion derived from the world of F1. Several other automakers are developing patented technology in the same vein, including Porsche, Ford, and even Subaru. Pre-chamber technology refers to the art of burning fuel twice through careful management of air and fuel flow, thereby maximizing the amount of power you get from every combustion event and reducing the amount of waste in those gases once spent. HKS is aiming for the same result.

Add CarBuzz to your Google News feed.

In combination with this, the pistons are plated in nickel and molybdenum, a material that increases the strength of steel and other alloys at high temperatures. The crowns of these pistons have swirl patterns to further enhance combustion efficiency, while the valves and valve guides have been rounded to prevent any hot spots. Also worth noting is that the spark plugs have been coated in a more conductive phosphor bronze alloy. But wait, there’s more.

Bigger Displacement = More Torque

Since HKS is making all this effort, it makes sense to go the whole hog with larger pistons and bigger cylinders. The stroke has increased from 89.7 millimeters to 95.7 mm, unlocking more torque, while the bore is 0.5 mm greater at 88 mm, increasing capacity from 1,618 cc to 1,746 and reducing compression from 10.5:1 to 10:1. With this, turbo lag should be reduced. Speaking of, HKS is developing various injector options to support whatever size turbo you go with. Naturally, when you’re chasing more power, there’s a risk of worsened reliability, and that is likely to be the case here because the prototype engine has a custom crankshaft with the balance shaft deleted. This is great for unlocking more power but can have disastrous consequences in the long term. Presumably, more development must still be done because no power figures have been claimed.

Related

Full-Carbon Skyline GT-R Painted Midnight Purple III Features World’s First HKS RB30 Engine

Sakamoto-san has created another masterpiece unlike anything else SEMA has to offer.

Source:
The Drive