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Performer RPM Buick
- Designed for 400, 430 and 455 c.i.d. Buick engines
- Available bare or fully assembled and ready to bolt-on with high-quality stainless steel 2.125" intake and 1.75" exhaust valves
- 68cc combustion chambers produce 9.2:1 compression ratio with stock pistons
- Accepts widely available small-block Chevy adjustable rockers
- High flow 130cc exhaust ports
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| Specifications |
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| Combustion Chamber |
68cc |
| Intake Runner Volume |
215cc |
| Exhaust Runner Volume |
130cc |
| Intake Valve |
2.125-inch |
| Exhaust Valve |
1.750-inch |
| Deck Thickness |
5/8-inch |
| Valve Spring |
1.550-inch O.D.
Up to .600" lift |
| Rocker Stud / Guideplate |
3/8" / Hardened Steel |
| Sparkplug |
14mm x 3/4", gasket seat |
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| Part # |
Description |
| 60049 |
Complete; fully assembled with parts. Ready to install out-of-the-box. |
| 60039 |
Bare; requires valves, valve springs, retainers and locks. Requires finish valve job and sizing of valve guides. |
Technical Notes: Sold individually. Requires the use of hardened push rods. Designed to be used with adjustable rockers; typical small-block Chevy rocker arms are widely accessible and recommended.
Flow Data tested @ 28" H20 (rated in CFM)
| Valve Lift |
.100" |
.200" |
.300" |
.400" |
.500" |
.600" |
| Intake |
68 |
127 |
190 |
241 |
274 |
273 |
| Exhaust |
58 |
108 |
150 |
173 |
173 |
190 |
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| Performance Results |
| Peak HP: |
481 @ 5500 RPM |
| Peak Torque: |
541 @ 4000 RPM |
| CID: |
462 (+.030 455cid) |
| Bore x Stroke: |
4.342" x 3.900" |
| Compression Ratio: |
9.5:1 |
| Camshaft: |
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| Lift: |
.500" / .500" |
| Duration @ .050: |
242° / 250° |
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| Engine RPM |
Corrected HP |
Corr. Torque |
| 2500 |
221.7 |
465.7 |
| 3000 |
271.0 |
474.4 |
| 3500 |
327.2 |
491.0 |
| 4000 |
412.3 |
541.3 |
| 4500 |
446.9 |
521.6 |
| 5000 |
464.9 |
488.3 |
| 5500 |
481.2 |
459.5 |
| 6000 |
459.3 |
402.0 |
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AMC
