Engine Specs - S65 ValveTrain
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Contents
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 |
