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Pontiac Supercharger Kit Installation - Double Down
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| RPM |
N/A |
N/A |
Boost |
Boost |
| HP |
Torque |
HP |
Torque |
| 2,600 |
223.9 |
452.3 |
300.4 |
609.0 |
| 2,700 |
234.7 |
456.6 |
319.6 |
621.8 |
| 2,800 |
244.7 |
459.0 |
339.5 |
636.7 |
| 2,900 |
252.6 |
457.5 |
360.5 |
652.9 |
| 3,000 |
262.5 |
459.6 |
381.7 |
668.2 |
| 3,100 |
270.9 |
459.0 |
402.7 |
682.2 |
| 3,200 |
278.3 |
456.8 |
424.3 |
696.5 |
| 3,300 |
284.1 |
452.2 |
448.1 |
713.1 |
| 3,400 |
289.5 |
447.2 |
472.2 |
729.4 |
| 3,500 |
294.5 |
441.8 |
499.6 |
749.7 |
| 3,600 |
313.2 |
456.8 |
525.8 |
767.0 |
| 3,700 |
321.1 |
455.7 |
552.1 |
783.7 |
| 3,800 |
334.0 |
461.5 |
577.8 |
798.6 |
| 3,900 |
346.9 |
467.3 |
601.1 |
809.5 |
| 4,000 |
358.7 |
470.9 |
630.6 |
828.1 |
| 4,100 |
378.3 |
484.7 |
654.8 |
838.8 |
| 4,200 |
393.5 |
492.1 |
679.8 |
850.1 |
| 4,300 |
400.2 |
488.9 |
705.0 |
861.1 |
| 4,400 |
406.1 |
484.8 |
730.9 |
872.4 |
| 4,500 |
417.9 |
487.8 |
753.7 |
879.7 |
| 4,600 |
417.7 |
476.9 |
776.2 |
886.2 |
| 4,700 |
412.9 |
461.4 |
795.5 |
889.0 |
| 4,800 |
433.3 |
474.1 |
813.8 |
890.5 |
| 4,900 |
433.3 |
464.3 |
826.4 |
885.9 |
| 5,000 |
393.4 |
413.3 |
841.7 |
884.2 |
| 5,100 |
425.3 |
438.2 |
849.8 |
875.2 |
| 5,200 |
458.9 |
463.7 |
856.6 |
865.1 |
| 5,300 |
415.9 |
412.0 |
862.9 |
855.2 |
| 5,400 |
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861.3 |
839.7 |
 Again, nothing really exotic...  Again, nothing really exotic going on here, just a production 3/4-length windage tray, along with the new BOP Engineering one-piece pan-gasket cap off the rotating assembly. (The BOP Engineering gasket was easy to reuse.)  This shot shows the porting...  This shot shows the porting done in the bowl area. The exhaust was also opened up slightly to accommodate the Manley 1.71-inch exhaust valve.  The ports were treated to...  The ports were treated to a minor street-style porting job, which raised the flow from 294 cfm to 315 cfm at 0.650-inch lift and at 28 inches of water.  In order to make this engine...  In order to make this engine easy to duplicate, Luhn Performance sought to use as much off-the-shelf components as possible, such as the Edelbrock intake valves and Manley exhaust valves and pushrods, and Crane valvesprings and lifters.  The pistons are sunk 0.043-inch...  The pistons are sunk 0.043-inch below deck to achieve a 9:1 compression ratio. This works fine in a supercharged application, as quench area is not nearly as significant a factor as it is in a normally-aspirated combination. The custom Cam Motion grind is also visible here.  Crane Gold roller 1.65:1 ratio...  Crane Gold roller 1.65:1 ratio rockers are used to provide 0.616/0.627-inch lift. Big-block Chevy 3/8-inch pushrods are also used. A stud girdle from the now-defunct Indian Adventures stabilizes the valvetrain. Equivalents are available from a variety of sources.
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