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· Premium Member
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Another Memory Monday thread revisit. Yet another thread that needs a followup now that it's got a better thread title.

· Super Moderator
4,756 Posts
The Performance Specs for the......5.7 Liter V-8 Engine,

VORTEC 5700 RPO CODE 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 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 four bolts attaching the intake manifold as opposed to the traditional six 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 (191 kW) to 350 hp (261 kW) at 4600 rpm and 430 ft-lbf (448 N•m) to 450 ft-lbf (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:

TBI L31 applications

  • 1996 G-Series vans over 8,500 lb (3,856 kg) GVW w/ 4L80E transmission
Edit......I Typed in the Wrong Number on the H.P......255 HP......Thanks Charile.....:glasses:


· Registered
1,665 Posts
I seem to remember my 1998 Suburban 5.7 makes 250 hp.
191 KW would be about 191/.75=255 hp.
I HP is about 3/4 of a KW-
PS The ancient Suburban 217,000 miles- sure feels stronger than 250 hp, but I think 250 is its rating.
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