Page 37 of 2009 Performance Parts by GM Parts Direct

crate engines ls series available for purchase online at gmperformanceparts.com ls376/480 crate engines ls series 19213229 the best of the ls3 mixed with a hotter cam just like you gm performance parts engineers spend much of their time wondering about the what if combinations when it comes to mixing and matching ls engine components and they have the tools and facilities to act on those instincts that s how we created the exciting ls376/480 crate engine our power-mad engineers started with the production ls3 6.2l 376 cubic-in engine including its rectangular-port l92-style heads and swapped the stock camshaft for the racing-inspired ls hot cam p/n 88958733 and the result was nothing short of astonishing with no other modifications horsepower jumped from 430 to 480 and torque rose from 424 lb-ft to 475 that s about 12 percent more power and torque from a simple camshaft change the key to the power boost is the hot cam s 0.525-inch lift on both the intake and exhaust sides along with 219-degree/228-degree duration specs that s less lift on the intake side than the stock ls3 cam but considerably more duration allowing the valves to stay open a little longer to draw in more air as a result peak horsepower comes earlier than the stock ls3 and the torque curve remains flat higher on the rpm band ls3 engine foundation sustains torque longer 480 hp 475 lb-ft torque installation notes · 14-inch automatic transmission flexplate included · assembly does not include any electronics · ls376/480 controller kit p/n 19201327 available for non-corvette applications kit includes electronic throttle pedal which is required for throttle input to the ecu see page 288 · 2009 throttle body is installed on engine to use ls376/480 controller kit p/n 19201327 2008 throttle body supplied must be installed · includes corvette wet sump oil pan · intended for pre-1976 street vehicles or any off-road vehicle · not intended for marine applications · non-corvette applications require flexplate p/n 12602448 see page 300 for information on our reference guide p/n 88959384 for installing an ls engine in an older car ls376/480 dyno chart possible applications give your late-model corvette a new lease on life update your 4th-gen trans am with an ls1 replacement applications have not been validated they are merely suggestions of how you might enjoy your gm performance parts crate engine some applications may affect engine warranty see page 352 for specific warranty information some applications may not be emission-legal check state and local ordinances ls376/480 tech specs part number engine type displacement cu in bore x stroke in block p/n 12584727 crankshaft p/n 12597569 connecting rods p/n 12617570 pistons p/n 19168089 camshaft type p/n 88958733 valve lift in camshaft duration 050 in 19213229 ls series gen iv small-block v-8 376 cu in 6.2l 4.06 x 3.62 103.25 x 92mm cast-aluminum with 6-bolt cross-bolted main caps nodular iron powdered metal hypereutectic aluminum hydraulic roller .525 intake .525 exhaust 219° intake 228° exhaust valve size in compression ratio rocker arms p/n 12569167 int rocker arms p/n 10214664 exh rocker arm ratio recommended fuel maximum recommended rpm reluctor wheel balanced cylinder heads p/n 12615879 aluminum l92 style port as cast with 68cc chambers 2.165 int 1.59 exhaust 10.7:1 investment-cast roller trunnion investment-cast roller trunnion 1.7:1 92 octane 6600 58x internal available for purchase online at gmperformanceparts.com gm performance parts crate engines include a 24-month or 50,000-mile/80,000-kilometer limited warranty gm performance parts does not utilize any used or remanufactured parts in this crate engine for a complete list of parts to complement and finish this engine turn to page 80 buy online at www.gmperformanceparts.com 71 70 buy online at www.gmperformanceparts.com gmpp_2009_pages058-089_final_rev.indd 70-71 11/21/08 3:58:05 pm

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