We have tried to present an honest analysis of turbochargers so you can make an informed choice.

1. Mission & Statement
We Are The China Turbocharger Supply Chain Expert.
- GP Turbo is an OE standard manufacturer.
- We help our customer including brands distributors, importers and remanufacturers to carry
inventory, more than 1000 sku that you can choose from.
- What we aim to is helping customers expanding market with our annual investment in new
turbocharger development.

2. • We have tried to present an honest analysis of
turbochargers so you can make an informed
choice.
• For Any Further Requirements, Please contact
ALEX – Sales Engineer
• alex@nbmotor.com, +8613819853152

3. GP Turbo (OEM Standard) V.S. Other Factory's Turbo
- The Devil Is In the Details
The most important thing you should remember is that you need to source turbochargers that
are manufactured strictly according to OEM Standard like Garret's and BorgWarner’s. GP Turbo is
a company like this, and we have 1 year quality guarantee for every client. To help you see clear
benefits of GP Turbo, we have compared a GP turbocharger model with other factory’s
turbocharger.
This turbocharger model number is 8971397243 for Isuzu Trooper Opel/Vauxhall, KW：100,
Engine：4JB1T, Year：1998-2004.
Findings
1. GP turbo undergoes precise machining process to ensure smooth finish and perfect fitting
mechanism
2. GP Turbo are manufactured using industry approved materials that ensures, the turbocharger
has the strength to withstand extreme temperatures that are formed during fuel combustion.

4. OEM Design Specifications
GP turbo is designed strictly as OEM specifications so that you don’t have to make expensive
modifications when you need to replace factory fitted turbocharger in the vehicle.
You can see from the pictures, our turbocharger has the fitting hole at right place so that you
can easily fix the turbocharger on the engine.
Another manufacturer’s turbocharger ignores the OEM design and requires the technician to
make major modifications to fit the turbocharger.

5. Turbine Housing
A look at the above given samples and you can see the fitting holes on both turbocharger are different. The hole
diameter plays an important role in power and efficiency of the charger.
GP’s turbocharger has a smoother finish that is achieved by computer aided machining process.
Other turbocharger gives no importance to the scale and size of the internal parts which play an important role
in performance of the turbocharger.

6. Material Standards of Turbine Housing
Other’sGP Turbo’s
Let’s have a look at the different composition analysis of turbine housing l - QTSi-Mo.
Our major content figure for Si & Mo is 4.48 & 0.036, while other factory’s is only
3.16&0.028. This will affect the stability of turbine housing.

7. Compressor Housing
The air nozzle in GP turbo charger is housed at the sweet spot that ensures the
GP turbocharger gets the most value out of your nozzle.

8. Turbine Wheel
Fig a- shows the external structure of turbine wheel after subjected to higher temperatures
Fig b and c – shows typical macrostructure of hot tearing regions and the microstructure of
crack that develop at high temperatures

9. Composition Analysis of Turbine Wheel
Let’s look at this turbine wheel composition analysis. The material is 713C , however
our competitor’s value of B, Zr and Al is not according to the OEM standard . This is
specifically done to keep costs low while in sacrifice with the security of turbine wheel.
GP’s
Other’s
713C Material OE Standard
Elemental composition Content（%）
C 0.08-0.20
Si maximum0.50
Mn maximum0.25
S maximum0.015
Cr 12.00-14.00
Mo 3.80-5.20
Nb+ Ta 1.80-2.80
Ti 0.50-1.00
Al 5.50-6.50
B 0.005-0.015
Zr 0.05-0.15
Fe maximum1.80
P maximum0.015
Cu maximum0.50
Co maximum1.00
Ni

10. Material Impurities of turbine wheel
Fig 1 (Other’s) Fig 2 (GP’s)
The Fig 1 shows the material composition analysis. The black spots marks the material impurities that affects the
molecular strength of the material used. On the other hand, the Fig 2 shows there are no material impurities in the
metal used in GP Turbocharger which means you get a superior performing turbocharger that has longer life. Let’s say if
the compressor wheel fails, the turbo will fail, then how about the engine? It’s unbelievable.

11. Seal Ring
The seal ring of GP turbocharger uses W6Mo5Cr4V2, material that has high
temperature resistance at 350-400℃. Another turbocharger is 3Cr13 which has a
temperature resistance at 250-300℃, this will be a hidden trouble for the turbo.

12. Machining
The GP turbocharger has smoother finish that shows the higher level of craftsmanship and
superior turbocharger parts. On the other hand, the other turbocharger manufacturer
shows no inclination towards machining that is standard industry requirement to produce
superior automotive parts.

13. Lack of glue
The lack of glue in turbocharger parts is a clear indication of loose fitting. As you can see
there is no sign of glue in other turbocharger parts whereas GP turbochargers have the marks
of industrial glue that keeps the parts fitted together.