QSM11 Diesel Engine Turbocharger R385-9 4037707 For Excavator Construction Machinery
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QSM11 Diesel Engine Turbocharger R385-9 4037707 For Excavator Construction Machinery
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Basic Infomation
Place of Origin: China
Brand Name: Cummins
Model Number: QSM11
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QSM11 Diesel Engine Turbocharger

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R385-9 Diesel Engine Turbocharger

Payment & Shipping Terms
Packaging Details: Neutral Package or Fumigation Free
Delivery Time: 5 - 8 work days
Payment Terms: D/P, T/T
Supply Ability: 100 pieces
Specifications
Product Name: Diesel Engine Turbocharger
Excavator Model: R385 - 9
Engine Model: QSM11
Part Number: 4037707
Quality: High Quality
Condition: New
Color: Same As Pictures
Material: Metal
Product Description

 

 

QSM11 Diesel Engine Turbocharger For Excavator R385 - 9 4037707 Diesel Engine

 

 

Specification

 

Part Name: Engine turbocharger Serial code: HS77190517324
cylinders numbe: 6 Type: Diesel engine
Application: Construction machinery Cust: 40337707
Type: Direct injection or Electric injection Industrial Engine: QSM11
Model: HX55W Assy: 4037707

 

 

Description


How does a turbocharger help a small engine?


This kind of power can be easily provided by a downsized engine with a turbocharger. Hanging a turbo on a small engine allows a little engine to breathe big. With only 6 to 8 pounds of boost pressure, a turbo can increase power output 15 to 25% or more over a naturally aspirated engine.

 

Turbo Tweaks

 

Dialing up the boost pressure is a quick and easy way to increase power in any turbo engine – up to a point. The stock fuel injectors in many diesel engines can safely handle higher boost pressures but that’s usually not the case with gasoline engines.

 

The flow capacity of the stock injectors in a gas engine can quickly max out if turbo boost is increased more than a few pounds beyond stock levels. This may cause the fuel mixture to go dangerously lean, resulting in detonation, melted pistons or a blown head gasket. To prevent such a disaster from happening, the flow rate of the injectors have to be matched to the boost pressure and airflow delivered by the turbo. Consequently, if you want to dial up the boost pressure for more power, you’re going to need a set of higher flow injectors.

 

In gasoline engines, more octane is also needed as boost pressures go up. The engine’s knock sensor can back off timing and boost pressure if detonation is detected, but that also kills performance. Most turbo engines recommend premium fuel because the higher octane helps the air/fuel mixture resist detonation. Premium pump gas is usually only available with octane ratings of 91 or 93, so higher octane racing gas or alcohol (methanol or ethanol) may be needed if turbo boost pressures are increased beyond stock.

 

The bottom end of most turbo engines is strong enough to handle a moderate increase in boost pressure over stock. But for a real killer street or race engine that’s running lots of boost, stronger pistons, connecting rods and crankshaft are probably going to be a must.

 

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