|
|
Attentions to POWER ENTERPRISE Off-Road product users:
Warning: POWER strongly recomends not to purchase the POWER products through any party who dose not have installation facility nor proper technical knowledges of POWER products. POWER ENTERPRISE accepts issues of warranties only through POWER authrized dealers.
|
Useful Conversion Factors (some numbers are estimated values)
1" = 25.4 mm
1 lb ≒ 0.453592 kg
1psi ≒ 0.069 bar
1 cubic inch of volume = 16.387 cc
1m3 ≒ 35.31ft3
1ft3 ≒ 0.03m3
1cfm ≒ 28.3L/min
1 gal (US) ≒ 3.785 L
1 hp ≒ 0.745 kW= 1.013 869 PS = 550 ft.lb/s
29.92 inches of mercury = 1013.25 millibars
1 atmospheric pressure ≒ 1 kg/ cm2 (14.7 lbs/inch2)
0.075 lbs/cu.ft. of air (ASME) = 14.7 PSIA, at 68°F and 36% relative humidity
Air density: The temparature rises from 70F to 120F, the density of air decrease by 10%
Compression Ratio Changes: Example: 86mm stroke engine with 9:1 compression ratio can be reduced to 8.5:1 by reducing the head gasket thickness, approx. 0.56mm.
Sample formula for 9:1 to 8.5:1 : 0.00196 x 86 = 0.56mm
Sample formula for 10:1 to 9.5:1 : 0.0065359 x 86 = 0.562mm
|
Useful Conversion Factors (some numbers are estimated values)
1 lb-ft ≒ 1.355 8 Nm = 0.138 kg.m
1 kg-m = 9.80 Nm
1kgf/cm2=14.22 psi
Temp. C = 5/9 (°F - 32) & Temp. F = (9/5 * °C) + 32: 0C=32F, 100C=212F
CC/min ≒ lbs/h x 10.25 (91 octan at 65F temp.)
1CC of air ≒ 0.0012g, 1g of air =830cc
C.I.D = CC's / 16.39
CFM=kg/sx1731.8 @ 85F(temp)&29.92im(1013mb, std of sea level pressure)
1 aviordupois weight = 16Lbs of weight =453.6g
Ohm - (Ω) The unit of electrical resistance; the resistance between two points on a conductor when a constant potential difference of 1 volt between them produces a current of 1 ampere
Joule - (J) 1J is the equivalent of 1W of power radiated for one second.
Watt = The unit of power W or Joule/second
Volt =The force required to send 1A through 1Ω
|
| Helpfull Info: Engine Bearings |
|
| Recommended Connecting Rod Bearing Oil Clearance 0.04mm |
|
| Recommended Crank Main Bearing Oil Clearance 0.05mm |
|
| |
|
| MRS Turbo Kit (Installation Guide) |
CAMCON for Toyota & Scion Quick Installation |
| PBC (Boost Controller Installtion Guide) |
CAMCON Toyota Info and Installation Guide |
| PFSC (Fan Switch Controler Installation Guide) |
CAMCON Honda Info and Installation Guide |
| V-TEC Controler Installation Guide |
V-Mount Cooling System Section.1 |
| Turbo Flow Chart |
V-Mount Cooling System Section. 2 |
| |
V-Mount Cooling System Section. 3 |
| |
V-Mount Cooling System Section. 4 |
| |
|
PBC Wiring (The Power Boost Controller PBC has been discontinued, since 2006, for production)
  |
HOW TO SELECT THE RIGHT BEARINGS (Connecting Rod Bearing) |
 |
1. Measure the OD of all connecting rod journals by use of a micrometer and log 1/1000 mm of measurement units
Example: SR20DET Connecting Rod OD 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)
Example: SR20DET Connecting Rod ID 51.008 mm
Calculation to determine the size of bearing.
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. Power Enterprise F1 Black Metal can withstand far superior to this situation than any other bearings in the world and this is one of reason the F1 Black is the most popular bearing among WRC and GT fields.
Example: If an average of high performance street engine's oil clearance is 0.04mm (connecting rod) and 0.05mm (main), an average oil clearance of modern race engine often set as large as 0.05mm (connecting rod) and 0.06mm (main) or more for less frictional resistance.
|
|
|
