Does a ball bearing turbo spool faster?
Ball bearing turbos offer unmatched throttle response, spooling up to 15% faster than traditional journal bearings. Ball bearings have less friction for the compressor and turbine to spin on. Thus they are faster to spool.
Are journal bearing turbos good?
When combined with a proper driving style a journal turbo with a upgraded impeller can outperform a driver in a ball bearing turbo car everytime and the journal turbo car will have the proven reliability and cooler internal temps that only a journal turbo design can offer.
Are ball bearing or journal bearing turbos better?
With the ball bearing cartridge the damping and control over shaft motion is far more durable and superior over the journal bearing. This allows enhanced reliability of both extreme and every day conditions.
Do ball bearing turbos need oil?
Ball Bearing Turbo An oil restrictor is recommended for optimal performance with ball bearing turbochargers. Oil pressure of 40 – 45 psi at maximum engine speed is recommended to prevent damage to the turbocharger’s internals.
Do ball bearing turbos have shaft play?
Ball bearing turbos will have no shaft play at all when they are in working order. Ball bearing turbos are not as common due to the high cost of the units. The tolerance for shaft play on a floating bearing turbo is enough that it can be seen but the blades of the unit will not touch the sidewall of the housing.
Does a journal bearing turbo need a restrictor?
Journal Bearing Turbo An oil restrictor is generally not needed except for oil-pressure-induced leakage. The recommended oil feed for journal bearing turbochargers is -4AN or hose/tubing with an ID of approximately 0.25”.
How much shaft play should a journal bearing turbo have?
While there is always going to be shaft play in a journal bearing turbo, the allowable tolerances we’re talking about is 0.003″-0.010″ which isn’t much to really notice. If you have 0.020″ of shaft play, the bearings are worn and it’s going to wear at a much faster rate as opposed to bearings that are within tolerance.
What is the difference between a journal bearing and a thrust bearing?
The Role of Bearings Journal bearings support radial loads (perpendicular to the axis of rotation). Thrust bearings support axial loads (along the axis of rotation).
Whats the best bearing for a turbo?
When driving a vehicle with the cartridge ball bearing turbocharger, you will find exceptionally crisp and strong throttle response. Garrett Ball Bearing turbochargers spool up 15% faster than traditional journal bearings. This produces an improved response that can be converted to quicker 0-60 mph speed.
Do journal bearing turbos have shaft play?
How much oil pressure does a journal bearing turbo need?
between 40 psi and 45 psi
Oil pressure entering a ball-bearing turbocharger needs to be between 40 psi and 45 psi at the maximum engine operating speed. For many common passenger vehicle engines, this generally translates into a restrictor with a minimum of 0.040″ diameter orifice upstream of the oil inlet on the turbocharger center section.