L31 is a V8 truck engine. Displacement is 5.7 L. It is the last production Generation I small-block from Chevrolet. The cylinder heads feature combustion chambers and intake ports very similar to those of the LT1 V8, but without the reverse-flow cooling. As such, the L31 head is compatible with all older small-blocks, and is a very popular upgrade. It offers the performance of more expensive heads, at a much lower cost. It does, however, require a specific intake manifold (a Vortec head has 8 bolts attaching the intake manifold as opposed to the traditional twelve bolts per head). The L31 was replaced by the 5.3 L 5300 LM7. The 2002 model year was the final year for the L31 5.7 L small block V-8 whose origins date back to 1955. The Vortec 5700 produces 255 hp (190 kW) to 350 hp (261 kW) at 4600 rpm and 330 lb·ft (447 N·m) to 350 lb·ft (475 N·m) of torque at 2800 rpm. It is currently being produced as a crate engine for marine applications and automotive hobbyists as the "ramjet 350" with minor modifications. L31 applications: 1996–2003 Chevrolet Express/GMC Savana full-size vans 1994–1999 Chevrolet/GMC C/K full-size trucks 1996–1999 Chevrolet Suburban/GMC Suburban full-size long-wheelbase SUVs 1996–1999 Chevrolet Tahoe/GMC Yukon (and 2000 Tahoe Limited) full-size short-wheelbase SUVs 1999–2000 Cadillac Escalade TBI L31 applications 1996 G-Series vans over 8,500 lb (3,856 kg) GVW w/ 4L80E transmission Special applications
_________________ GMC savana explorer limited '97
Love My Big Beauty
|