POWER's F1 Black Engine Bearing Supports 1000 HP with much less friction than any other race bearings in the market
Reducing the crank shaft temperature by
20C ( 68F) degrees lower than other bearings.

POWER F-1 Black Bearings
1. Crystallized pyramid shape overlay.
2. The crystallized pyramids overlay of POWER F-1 bearing retains more oil on its much larger surface resulting in lower film pressure, lower bearing/journal temperature and help floats the crankshaft centered. It reduces crank shaft temperature by 20 degree C (68 F) lower than any other leading racing bearings.

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POWER F-1 Black Bearings

POWER F-1 Black Metal have longer life span
than any other leading bearings.



 
Applications
  
Some major engine bearing manufacture sells only 3 different thickness, a standard, 1-undersize and 1-oversize, but Power's F1 Black Metal offers, 5 to 6 different thickness for each connecting rods and main bearings to make perfect oil clearance. None of machine shop can make the journals perfectly at exact measurement, for instance, to make 0.003mm oil clearance with a given standard size bearing.

HOW TO SELECT THE RIGHT BEARINGS (Connecting Rod Bearing)
Power's F1 Black Metal offers, 5 to 6 different thickness for each connecting rods
and main bearings to make perfect match to your race engines.

1. Measure the OD of all connecting rod journals by use of a micrometer and log 1/1000 mm of measurement units. Best to measure 6 points across the journals from different angles.

Example: SR20DET Connecting Rod OD average 47.966 mm

2. Measure the ID of all connecting rod housing by use of
a dial gage and log 1/1000 mm of measurement units.
(Install the cap without the bearings and tight with a torque wrench. Best to measure 6 points across the housing from different angles. )

Example: SR20DET Connecting Rod ID average 51.008 mm
Calculation to determine the size of bearing thickness.
If the target oil clearance is 0.030 mm, then:
51.008 mm - 47.966 mm = 3.042mm
3.042 mm - 0.03 mm = 3.012 mm
3.012 mm / 2 = 1.506 mm
(dividing by 2 to get one bearing thickness)
Go to product list to find the part #, this case 1101-MN222

1101-MN222 is applicable between 1.504mm to 1.508mm
2 / Brown 1.5mm +0.008 1101-MN222
+0.004
HOW TO SELECT THE RIGHT BEARING THICKNESS (Crank Main Bearing)

1. Measure the OD of all crank main journals by use of a
micrometer and log 1/1000 mm of measurement units

Example: SR20DET crank main journal OD 54.970 mm

2. Measure the ID of all crank main housing by use of
a dial gage and log 1/1000 mm of measurement units.
(Install the cap without the bearings and tight with a torque wrench)

Example: SR20DET crank main housing ID 58.956 mm
Calculation to determine the size of bearing.
If the target oil clearance is 0.020 mm (SR20 main clearance is much smaller than the average) , then:
58.956 mm - 54.970 mm = 3.986 mm
3.986 mm - 0.020 mm = 3.966 mm
3.966 mm / 2 = 1.983 mm
Go to product list to find the part #, this case 1102-MN222

1102-MN222 is applicable between 1.981mm to 1.985mm
2 / Brown 2.0mm -0.015 1102-MN222
-0.019
To confirm the selected bearing is proper size (Using Plasti Gage)
After installed the bearings, check with Plasti-Gage to confirm the desired oil clearance of both main and rod. The picture lower left SR20DET connecting rod shows it has a clearance of approximately 0.038mm a slightly larger than the target clearance of 0.030mm. This is due to the bearing's crush height effect. When the caps were installed and properly torqued, the amount of crush height create a tension on the bearings toward out side of the housing, resulting in enlarging the clearance. Some extreme case happens with RB26 engine's crank main, the crush height create as large as 0.020mm enlargement.


Depending on the type of engine, more of modern race engines builders are tend to have 0.02mm or larger oil clearance than the most high performance street engines for less frictional resistance, but the down side of this would causes more fatigue on the engine and creates noise and vibration.