How do you read a turbo pressure map?

How To Read A Compressor Map – Turbo Tech

1. Pressure Ratio. The pressure ratio along the X-axis represents the boost you intend to run.
2. Airflow. The Y-axis represents airflow in pounds per minute.
3. Efficiency Island.
4. Wheel Efficiency.
5. Surge Limit.
6. Overspin Choke.
7. Compressor Wheel Speed.

How do you read a turbo size?

Using Precision Turbo’s ‘chargers as examples, the numbers represent the diameters of the inducer and exducer on the compressor and turbine wheels (measured in millimeters, from tip to tip of the blades on each wheel). With a 62/66, the first two digits are the compressor wheel size (62mm).

What is the efficiency of a turbocharger?

A value of turbocharger overall efficiency of 60% has been the objective of turbocharger designers and developers since their inception.

How is turbo rpm calculated?

Calculating Additional Points: 4200 RPM

1. Our Example:
2. Wa = Airflow actual (lb/min)
3. MAP = Manifold Absolute Pressure (psia) 28.025.
4. R = Gas Constant = 639.6.
5. Tm = Intake Manifold Temperature (degrees F) =130.
6. VE = Volumetric Efficiency 0.80.
7. N = Engine speed (RPM) = 4200 RPM.

What do Garrett Turbo numbers mean?

GT simply stands for “Garrett Turbo” 25 refers to the “frame size” of the turbo, based on the turbine wheel inducer (the inducer being the top of the blade). 60 refers to the compressor exducer size, in millimeters, of the compressor wheel.

How do I know if my Garrett Turbo is real?

Authentic Garrett turbochargers will have a nameplate on the housing. The nameplate is usually a thin aluminum plate with numbers and letters stamped into it. The nameplate is commonly bonded to the turbo compressor housing, sometimes with a couple of small rivets.

How is Turbo rpm calculated?

How do I choose the right size turbo?

Most of the time, the size of the turbine depends on its wheel’s exducer diameter, or the part of the wheel air passes over last. A larger bore in the housing will typically yield more power. Sort of. The trick is keeping the turbine wheel’s diameter within 15 percent of the compressor wheel’s, give or take.

Does turbocharger increase efficiency?

Turbochargers can boost the efficiency of an internal combustion engine by as much as 30 per cent. Consequently, the internal combustion engine is not going away any time soon.

What’s the horsepower of a Garrett T28 turbo?

The T28 is a journal bearing turbocharger rated at 250hp however some JDM manual S15’s and S14’s came in a ball bearing version which is rated at 260hp, they also came with different A/R’s on the turbine housing. Both turbo’s are oil and water cooled, even on the ball bearing version of the T28 the maximum safe boost you can run…

What are the parts numbers on a Garrett turbo?

NOTICE THE 720931-***5 IS REALLY THE ONLY IMPORTANT INFORMATION here. The other numbers are just variations of the exact same turbocharger. Garrett Advancing Motion upgrade their part numbers each time they make a change to the manufacturing process of the turbocharger, eg. Material content changes, adding gasket kits etc.

What kind of compressor does a Garrett GT2560R use?

Alternate Compressor Housing Options: Compact GT25R style Comp. Hsg. Dual Ball Bearing Garrett GT2560R (aka GT28R) Turbo. Excellent responding turbo for 4 cylinder applications. The Garrett GT2560R has a flow capacity of approximately 310HP.

What’s the difference between a T28 and GT25?

The T28 is one of Garrett’s older line of turbochargers while the GT25 (pictured above) is from the newer GT series of ball bearing turbos, both of these turbochargers have similar power ratings, and can both be had for around the same price, but how well do they deliver the power?