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  1. #1

    Default 99 Yukon HP and Performance Specs

    i was wondering if u guys can tell me the specs of the 99 yukon 5.7 engine. like HP and tq.

  2. #2

    Default

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

    Steve
    10 Chevy Traverse LT AWD
    02 Chevy Trailblazer LS (110K+ miles - loaded except for 4WD - WRECKED!)
    99 Chevy Cavalier LS (105K+ miles - commuter car)
    78 Chevy Suburban Silverado (454, 3/4 ton)
    62 GMC 3/4 ton Pickup (350 police interceptor)

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    * I've been saying for years that I was going to change my username, and I finally did.

  3. #3

    Default

    The Performance Specs for the......5.7 Liter V-8 Engine,

    THE
    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 Nm) to 450 ft-lbf (475 Nm) 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.....

    Last edited by 99'HEARTBEAT; 10-24-2011 at 04:23 PM. Reason: Correct Infor.

    MIKE


    99"SILVERADO
    5.3 l 3.73 l G80
    BLACK BEAR CUSTOM TUNE
    SNUGTOP l COLORMATCH l KATZKIN










  4. #4
    Legend

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    Default

    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-
    Charlie
    PS The ancient Suburban 217,000 miles- sure feels stronger than 250 hp, but I think 250 is its rating.
    1998 suburban-
    1/2 ton

    199500 miles
    River
    Ridge,LA

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