Racing Small-Block Chevy - Horsepower!
This thing has has aluminum on top of aluminum with SB2 heads and parts from the N-word roundy-round guys
Big Buzzin' Small-Block, 890 HP at 8,200 RPM
More rpm equates to more horsepower, and no one takes better advantage of that canon than the guys from NASCAR. They wind their stuff to the moon for hours on end so it is no surprise they cast off parts that show even a hint of fatigue. Ken Matthews knows that and swooped in on a set of SB2 heads from a Craftsman Truck-series engine when they were swapped out during seasonal maintenance. Ken works for Hutter Racing Engines, a company that leases engines to NASCAR teams in several different classes. In fact, the block Ken is using was once leased to Ward Burton's Hardee's Winston Cup team. After Ken received the heads, he built a 412-inch engine under it.
A. Intake Wilson Manifolds created a sheetmetal tunnel-ram to feed the 9,200-rpm and SB2 NASCAR heads that according to Ken "flow 82 percent." He means that a flow bench running wide open with no head on it represents 100 percent flow; his head flows 82 percent of the total. It's just how Hutter Engines measures things.
B. Stretched The carb was originally designed for Barefoot Bob McCurdy and his Buick-powered open-wheel Modified. It is a 1,050 that was cut in half and stretched to improve fuel distribution to all the cylinders.
C. No Distributor? It has an MSD crank trigger that throws sparks at the 9,200 shift point. The gear-ratio drop puts the engine right at the 8,200-rpm horsepower peak after each shift.
D. SB2 Heads The heads are NASCAR SB2 and can handle every bit of the 272/281 Comp Cams roller that has 0.830 lift. This head has a 12-degree valve angle and 36cc chambers.
E. Tubes The headers are custom tri-Y stepped from 1 7/8 to 2 inches by Pro Fab in North Carolina.
F. Rotator The block went roundy-round with Ward Burton as part of a leased engine. It is a Chevrolet Bow Tie block with a 4.182 bore and a 3.750-stroke Crower crank and 6-inch rods. Now it has 15:1 compression courtesy of JE pistons with a 0.100 dome.
G. Oil Control High-rpm engine builders pay attention to oil management. The Moroso oil reservoir only holds 5 quarts that are distributed by a five-stage Barnes oil pump. Three pump segments scavenge the oil pan, and the other two scavenge and pressurize the block to keep the oil from pooling anywhere for very long. At 8,000 rpm, the crankcase can hold 18 inches of vacuum to take the pressure off the low-tension oil rings.
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