エンジン アップグレード キット

スパーク プラグ - $25 to $50
Unlike most of the other parts in this list, spark plugs are regularly replaced after a certain time to ensure a good ignition of the air-fuel mixture in the combustion chamber. While some would go bad after just 30,000 miles, there are some spark plugs that would still be okay even after 50,000 miles.
のみ 可能 欠点 with this upgrade is if a plug was placed inwrong; otherwise, it might be the simplest and cheapest modification to an engine.

燃料 インジェクター - $150 から $300
Fuel injectors are responsible for squirting fuel to produce the air-fuel mixture, which is then ignited by the spark plugs. And like spark plugs, fuel injectors also need to be changed after a certain time — although in this case a little longer, around 50,000 to 80,000 miles.
通常, tuners go for larger injectors and those that put out more fuel. It is equally important but to know what size and what type of injector a car needs because putting in the wrong one might make the air-fuel mixture too rich.

冷気 空気 吸気 - $400 から $600
取得 a high quality yet less restrictive air filter can make an engine more responsive for as cheap as $70 to $120. Mechanics discourage this practice though due to heat soak, or a condition where the intake sucks warm air to the engine — which is not ideal.
This is why a lot of tuners go with a cold air intake, as it ensures that air being fed into the engine is cold and condensed, making more horsepower.

ラジエーター/ 冷却 システム アップグレード - $200 to $1,000
Many car owners upgrade to aluminum radiators because while copper ones have better heat transfer abilities, aluminum is just stronger and better at resisting corrosion and damage over time. Aside from the radiator though, it might be necessary to upgrade other parts of the cooling system like the the thermostat, cooling hoses, the water pump, as supporting modifications. Of course, picking a good coolant is also key.

排気 アップグレード (キャットバック または フル 排気) - $400 to $2,500
マフラー are meanant to reduce engine noises, but in the process, they also restrict the flow of exhaust gases coming from an engine. This leads tuners to have one of the the most common and most perceivable upgrades installed: a new exhaust system.
There are different ways to upgrade a car's exhaust system, but most experts agree that a cat-back system, where all exhaust components located after the catalytic converter are replaced, would increase engine power the most.

レーシング クラッチ キット - $400 to $1,700
While most consider the clutch assembly as not a part of an engine, it is still important for those looking to produce more horses to upgrade it since the clutch connects the flywheel to the transmission, and ensures that power is transferred to the wheels.
A クラッチ does not have impact on horsepower, but the best kits transfer power at a minimal loss. Aside from that, the stock clutch kit can only handle a specific power band — any higher than that, it may lead to huge damage for the clutch or even the entire transmission.

鍛造 ピストン - $750 へ $1,500
ほぼ すべて レーシング セットアップ use a forged piston, as they can handle more power and stay in higher RPMs without degrading over time due to heat. Speaking of crankshafts and connecting rods, it is also good to upgrade these to produce more power safely. But for street applications, a lot of stock crankshafts can deal with a few additional horses.

アフターマーケット カムシャフト - $1,300 へ $1,700
カムシャフト オープン バルブ of an engine, allowing air to either pass through a cylinder, or the exhaust gases exit the engine. stock camshafts are built to last for a long time, but original equipment manufacturer (OEM) parts may not be able to support a projected increase in horsepower. Bigger and stronger camshafts would not only open valves more and longer, but they also allow car owners to stay at high RPMs without worrying too much about wear。

ターボチャージャー/ スーパーチャージャー - $600 to $2,000
How can you add around 100 more horsepower to your car? The quickest answer would be forced induction, or by slamming a turbo or a supercharger into an engine — and for an already-turbocharged car, putting a bigger turbine.
For normally aspirated cars, turbocharging them might mean a delay in throttle response at cruising speeds — also called turbo lag — but the increase in horsepower and torque once the turbo spools are so huge that some would live with it, and just improve their driving mechanics.

ECU リマップ - $400 to $2,000
In short, the potential power gain from upgrades installed would not be reached if ECU tuning is not done properly. What remapping basically does is to control how much fuel is pumped in at certain power bands, and to select when the spark plug would trigger the combustion. remapping however only applies to modern cars, or those that utilize electronic fuel injection instead of carburetors. また, remapping does not come cheap: tuners usually charge a hefty amount for use of the software, the dynamometer which measures horsepower and torque figures, and the expert's skills which have been honed over time.