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BMW Engine Specifications |
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Engines |
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| Displacement |
2126 cc |
1990 cc |
2692 cc |
3430 cc |
2985 cc |
Bore |
92 mm |
89 mm |
84 mm |
92 mm |
89 mm |
| Stroke |
80 mm |
80 mm |
81 mm |
86 mm |
80 mm |
Compression |
10.0:1 |
8.0:1 |
9.0:1 |
10.0:1 |
8.0:1 |
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Cylinder Head |
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| Porting |
HiFlo ST |
None |
None |
HiFlo ST |
None |
Flow Increase |
18% |
0% |
0% |
18% |
0% |
| Valves- Intake |
46 mm ST |
46 mm |
40 mm |
46 mm |
46 mm |
Valves- Exhaust |
38 mm ST |
38 mm |
34 mm |
38 mm |
38 mm |
| Valve Guide |
Manganese Bronze* |
Bronze |
Bronze |
Manganese Bronze* |
Bronze |
Valve Guide Seal |
Teflon |
Rubber |
Rubber |
Teflon |
Rubber |
| Head Gasket |
94 mm |
90.5 mm |
Stock |
93 mm |
90.5 mm |
Camshaft |
275° Asymmetrical |
Stock |
Stock |
275° Asymmetrical |
Stock |
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Piston |
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Cast Piston |
Cast Piston |
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Cast Pistons |
| Weight |
600 grams |
700 grams |
540 grams |
600 grams |
700 grams |
Rings-Upper |
Moly 1.5 mm |
Chrome 1.75 mm |
Chrome 1.75 mm |
Moly 1.5 mm |
Chrome 1.75 mm |
| Rings-Middle |
Ductile 1.5 mm |
Ductile 2.0 mm |
Ductile 2.0 mm |
Ductile 1.5 mm |
Ductile 2.0 mm |
Rings-Oil |
3-Piece Chrome |
1 Piece Cast |
1 Piece Cast |
3-Piece Chrome |
1 Piece Cast |
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4.0 mm |
4.0 mm |
4.0 mm |
4.0 mm |
4.0 mm |
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Connecting Rod |
Stock |
Stock |
Stock |
Stock |
Stock |
| Weight in Grams |
710 grams |
730 grams |
605 grams |
730 grams |
730 grams |
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Crankshaft |
Stock |
Stock |
Stock |
Stock |
Stock |
| Stroke (mm) |
80 mm |
80 mm |
81 mm |
86 mm |
80 mm |
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Oil Pump |
Blue Printed |
Stock |
Stock |
Blue Printed |
Stock |
| Oil Pressure |
71-75 lbs. |
59-64 lbs. |
48 lbs. |
71-75 lbs. |
59-64 lbs. |
Oil Pan Baffle |
Added |
Stock |
Stock |
Stock |
Stock |
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Engine Output |
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| Yellow Line |
6200 rpm |
6200 rpm |
4800 rpm |
6100 rpm |
6200 rpm |
Red Line |
6400 rpm |
6400 rpm |
4800 rpm |
6400 rpm |
6400 rpm |
| Horsepower/RPM |
155 / 6000 |
110 / 5800 |
121 / 4250 |
260 / 5900 |
175 / 5500 |
Torque/RPM |
145 / 4200 |
115 / 3700 |
170 / 3250 |
235 / 4100 |
188 / 4500 |
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