Page 27 of 2009 Performance Parts by GM Parts Direct

crate engines small-block ht383 crate engines small-block 12499101 a classic combination engineered for big torque truck owners step right up replace that worn small-block in your pre-1976 truck with this big-torque combination using a 3.80-inch stroke crankshaft unique camshaft and heads designed to build workaholic torque the ht383 delivers 340 horsepower and a whopping 435 lb-ft of torque better still the ht383 produces a wide flat torque curve that hits the 400-lb-ft mark by 2500 rpm and doesn t dip below it through the 4000-rpm peak torque level it s just the thing to flatten grades when towing a trailer great in heavy street cars too ensuring the ht383 is up to every chore the bottom end features four-bolt mains an upgrade for most production engines that came with two-bolt mains a forged steel crankshaft and a smooth hydraulic roller camshaft its 9.1:1 compression ratio allows it to run on regular gasoline too we deliver the ht383 with an aluminum intake manifold ready for you to swap over the accessories from your tired engine don t forget we back the ht383 with a 24-month/50,000-mile 80,000-km limited warranty giving you peace of mind and your truck a new lease on life economical replacement solution 400 lb-ft from 2500 to 4000 rpm sturdy bottom end four-bolt mains installation notes · requires addition of carburetor ignition and starter not included · rochester quadrajet or holley 770-cfm carburetor recommended · comes with 12.75-inch externally balanced 153-tooth automatic transmission flexplate requires externally balanced flywheel for manual transmission see chart on page 175 · has right-side oil dipstick · designed for pre-1976 street vehicles or any off-road vehicle · not intended for marine applications 12499106 383 partial engine it comes with 4.00-inch-bore/3.80-inchstroke reciprocating assembly already installed including a forge steel crankshaft heavy-duty connecting rods and durable aluminum-alloy pistons check out gmperformanceparts.com for a list of power packages to improve the performance of this engine ht383 dyno chart possible applications your hot rod truck your hot rod station wagon your heavy project car anything that requires big-block torque in a small-block package 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 ht383 tech specs part number 12499101 engine type chevy small-block v-8 displacement cu in 383 bore x stroke in 4.00 x 3.80 block p/n 88962516 cast-iron with 4-bolt main caps crankshaft p/n 12489436 4340 forged steel connecting rods p/n 12497624 heavy-duty pm steel pistons p/n 12499103 hypereutectic aluminum camshaft type p/n 14097395 hydraulic roller camshaft lift in .431 intake .451 exhaust camshaft duration 050 in 196° intake 206° exhaust cylinder heads p/n 12558060 valve size in compression ratio rocker arms p/n 10089648 rocker arm ratio water pump p/n 88894341 recommended fuel ignition timing maximum recommended rpm balanced vortec iron 64cc chambers 1.94 intake 1.50 exhaust 9.1:1 stamped steel 1.5:1 cast iron 87 octane base 10° btdc 32° total 5000 external note distributor with melonized steel gear must be used with long blocks and partial engines with steel camshafts or engine damage will occur 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 56 buy online at www.gmperformanceparts.com 51 50 buy online at www.gmperformanceparts.com

[close]