Specifications, Pistons, Compression ratio reference chart – Tomei Powered RB28KIT/ FORGED 8 COUNTER CRANKSHAFT User Manual
Page 7: Connecting rod, Crankshaft
SPECIFICATIONS
PISTONS
-13.0
-11.2
-13.0
-11.2
COMPRESSION RATIO REFERENCE CHART
【RB26DETT】
【RB25DET】
CONNECTING ROD
Ring
Size
Valve Recess
Part No.
φ86.5
9.0
8.8
8.6
8.3
YES
NO
YES
1121865111
Standard
30.00
NO
φ86.5
Size
Compression Ratio Reference (With gasket)
Gasket
Bore Size
t=
t=
t=
t=
1.0mm
12mm
1.5mm
1.8mm
9.3
9.1
8.8
8.6
8.5
9.0
8.8
8.6
8.4
8.2
φ87.0
φ21
2738
1121865112
φ87.0
1121870111
2770
1121870112
Compression Height
Pin Dia.
Crown
Displacement
Volume
(cc)
(cc)
φ88.0
PART
CONNECTING ROD
Conrod Bolt
No
Yes
Valve
Recess
Gasket
Bore Size
t=
1.0mm
12mm
1.5mm
1.8mm
2.0mm
φ87.0
φ88.0
Size
Compression Ratio Reference (With gasket)
t=
t=
t=
t=
9.0
8.9
Conrod Bearing
NO
YES
NO
YES
Valve
Recess
φ87.0
8.7
8.6
8.3
8.1
8.6
8.4
8.8
8.6
8.4
8.2
7
CRANKSHAFT
77.7
(STD 73.7)
PART
NUMBER
CONNECTING ROD
Conrod Bolt
Conrod Bearing
Centerline
Big End Dia.X
Small End Dia. X
Material
Screw Size
Neck Length
Inner Dia.
Bearing Width
(mm)
Thickness
Thickness (Inner Bush Dia.)
3/8-24
40
φ48
17
STROKE (mm)
125002
119.5
φ51 x 21.8
φ21 x 21.8
SNCM439
7