Factory Camshaft Specifications
|
|
MM
|
SAE
|
| Base Circle
|
30.000
|
1.1811
|
| Lift
|
11.400
|
0.4488
|
| Intake Open
|
-1.000
|
ATDC
|
| Intake Close
|
102.000
|
ABC
|
| Exhaust Open
|
81.500
|
BBC
|
| Exhaust Close
|
14.000
|
ATC
|
Schrick '284' Camshaft Specifications
|
|
Base Circle: MM (SAE)
|
Lift: MM (SAE)
|
Opening Angle (° CA)
|
Spread
|
Intake Opens
|
Intake Closes
|
Exhaust Opens
|
Exhaust Closes
|
| Intake Cam
|
30.000
(1.1811)
|
12.000
(0.4724)
|
284
|
132-74
|
12
|
90
|
68
|
36
|
| Exhaust Cam
|
30.000
(1.1811)
|
12.000
(0.4724)
|
284
|
134-86
|
96
|
8
|
48
|
56
|
Schrick '292' Camshaft Specifications
|
|
MM
|
SAE
|
| Base Circle
|
30.000
|
1.1811
|
| Lift
|
11.400
|
0.4488
|
| Intake Open
|
-1.000
|
ATDC
|
| Intake Close
|
102.000
|
ABC
|
| Exhaust Open
|
81.500
|
BBC
|
| Exhaust Close
|
14.000
|
ATC
|
Valve Guide Specifications
|
|
MM
|
SAE
|
| Intake Guide
|
5.017
|
0.1975
|
| Valve Stem
|
4.971
|
0.1957
|
| Clearance
|
0.046
|
0.0018
|
|
|
MM
|
SAE
|
| Exhaust Guide
|
5.017
|
0.1975
|
| Valve Stem
|
4.966
|
0.1955
|
| Clearance
|
0.051
|
0.0020
|
Cam Follower Specifications
Factory Cam Followers (Original Hydraulic)
|
|
MM
|
SAE
|
| Type
|
Hydraulic
|
| Cup Type
|
Radius
|
| Diameter
|
28.000
|
1.596
|
| Weight
|
29.50 g
|
1.041 oz
|
Factory Cam Followers (Mechanical Conversion)
|
|
MM
|
SAE
|
| Type
|
Mechanical
|
| Cup Type
|
Radius
|
| Diameter
|
28.000
|
1.596
|
| Weight
|
30.13 g
|
1.063 oz
|
Del West Cam Followers
|
|
MM
|
SAE
|
| Type
|
Mechanical
|
| Cup Type
|
Radius
|
| Diameter
|
32.000
|
1.260
|
| Weight
|
25.00 g
|
0.882 oz
|
Valve Spring Retainer Specifications
Factory Valve Spring Retainers
| Measured Specs
|
MM
|
SAE
|
| Material
|
TBD
|
| Outer Diameter
|
TBD
|
TBD
|
| Inner Diameter
|
TBD
|
TBD
|
| Thickness
|
TBD
|
TBD
|
| Weight
|
TBD
|
TBD
|
Schrick Valve Spring Retainers
| Measured Specs
|
MM
|
SAE
|
| Material
|
Titanium
|
| Outer Diameter
|
25.85
|
1.018
|
| Inner Diameter
|
18.300
|
0.720
|
| Thickness
|
7.500
|
0.295
|
| Weight
|
6.00 g
|
0.212 oz
|
Valve Spring Specifications
Metric valve seat pressure is measured in Newtons.
Factory Valve Springs
| Measured Specs
|
MM
|
SAE
|
| Free Height
|
49.50
|
1.949
|
| Wire Diameter
|
3.40
|
0.134
|
| Coil Diameter (top)
|
22.25
|
0.876
|
| Coil Diameter (bot)
|
26.50
|
1.043
|
| Installed Height (L1)
|
41.90
|
1.650
|
| Lift Height (L2)
|
12.00
|
0.475
|
| Seat Pressure @ L1
|
267
|
60
|
| Seat Pressure @ L2
|
801
|
180
|
| Lift (L2 to Coil Bind)
|
1.524
|
0.060
|
| Maximum Lift
|
12.00
|
0.0475
|
| Spring Rate
|
44.500
|
252.63
|
| Spring Rate (lbs/mm)
|
9.946
|
| Weight
|
48.21
|
1.71
|
Eibach Valve Springs (Originally Sold* by BE, Dinan, RD Sport)
| Measured Specs
|
MM
|
SAE
|
| Free Height
|
48.500
|
1.909
|
| Wire Diameter
|
4.000
|
0.157
|
| Coil Diameter (top)
|
22.000
|
0.866
|
| Coil Diameter (bot)
|
26.200
|
1.031
|
| Installed Height (L1)
|
41.90
|
1.650
|
| Lift Height (L2)
|
12.00
|
0.475
|
| Seat Pressure @ L1
|
400
|
90
|
| Seat Pressure @ L2
|
1045
|
235
|
| Lift: L2 to Coil Bind
|
3.175
|
0.125
|
| Maximum Lift
|
13.000
|
0.512
|
| Spring Rate
|
53.75
|
305.26
|
| Spring Rate (lbs/mm)
|
12.018
|
| Weight
|
40.53 g
|
1.430 oz
|
NOTE *: These valve springs are no longer available.
Supertech Valve Springs (Currently Sold by BE)
| Manufacturer Specs
|
MM
|
SAE
|
| Free Height
|
50.500
|
1.988
|
| Wire Diameter
|
3.900
|
0.154
|
| Coil Diameter (top)
|
22.800
|
0.898
|
| Coil Diameter (bot)
|
27.700
|
1.091
|
| Installed Height (L1)
|
41.90
|
1.650
|
| Lift Height (L2)
|
12.000
|
0.475
|
| Seat Pressure @ L1
|
400
|
90
|
| Seat Pressure @ L2
|
845
|
190
|
| Lift: L2 to Coil Bind
|
3.175
|
0.125
|
| Maximum Lift
|
13.000
|
0.512
|
| Spring Rate
|
37.08
|
210.52
|
| Spring Rate (lbs/mm)
|
8.288
|
| Weight
|
42.92 g
|
1.514 oz
|
Schrick Valve Springs
| Manufacturer Specs
|
MM
|
SAE
|
| Free Height
|
52.500
|
2.067
|
| Wire Diameter
|
3.800
|
0.150
|
| Coil Diameter (top)
|
26.000
|
1.024
|
| Coil Diameter (bot)
|
26.000
|
1.024
|
| Installed Height (L1)
|
41.90
|
1.650
|
| Lift Height (L2)
|
12.000
|
0.475
|
| Seat Pressure @ L1
|
400
|
90
|
| Seat Pressure @ L2
|
934
|
210
|
| Lift: L2 to Coil Bind
|
3.175
|
0.125
|
| Maximum Lift
|
13.000
|
0.512
|
| Spring Rate
|
44.50
|
252.63
|
| Spring Rate (lbs/mm)
|
9.946
|
| Weight
|
38.20 g
|
1.347 oz
|