The discontiuation of the 5.7L Vortec, Was it the Right Move?

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Thread: The discontiuation of the 5.7L Vortec, Was it the Right Move?

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    5.3 Liter Vortec V8 Corr69's Avatar
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    The discontiuation of the 5.7L Vortec, Was it the Right Move?

    From 1998 -1999 GM completely redesigned the Silverado/Sierra, new everything, including drive terrian. But many of us were sad to see the 350 leave the line up. The 5.3L was the motor which replaced it. Was this the right move, in 1999 the 5.3L was claimed to have 270horsepower and 315 lb-fts of torque, and the old 5.7L had 255hp, and 325lb-fts of torque. Many people believed that the 5.7l was still more powerful, and that GM made a mistake replacing the 5.3L. So if you have had a 96-98 Silverado give your opinion on what engine had better overall performance.


    1997.5 Buick Regal GS : 4'' Fenderwell CAI, Headers, 3.4'' Pulley, Catback, Tune.

    Mid 13s run after run after run.

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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    Quote Originally Posted by Corr69
    From 1998 -1999 GM completely redesigned the Silverado/Sierra, new everything, including drive terrian. But many of us were sad to see the 350 leave the line up. The 5.3L was the motor which replaced it. Was this the right move, in 1999 the 5.3L was claimed to have 270horsepower and 315 lb-fts of torque, and the old 5.7L had 255hp, and 325lb-fts of torque. Many people believed that the 5.7l was still more powerful, and that GM made a mistake replacing the 5.3L. So if you have had a 96-98 Silverado give your opinion on what engine had better overall performance.
    IIRC, GM changed the engines to a large degree because of the intense media pressure bashing GM for using "30 year old engine designs" while Ford had the
    "new OHC V8" pieces of crap in their trucks.

    Building an all-new truck with a new engine seemed like the right way to go at the time.

    Calling it a mistake would be a stretch. I'd like to see the 350 return to the lineup again since it's such a legendary motor. I've never known anyone who could find something bad to say about it. Lots of owners are unhappy with the piston slap problems in the 5.3.

    That said, I wouldn't be suprised if Chevy has a new 350 up their sleeve to be the optional motor in the GMT-900. Retro is in, and what better way to sell a new truck that combines the heritage of a Chevrolet with the future of trucks by installing a next-gen 350 in her.

    I love my 350. It's strong, decent gas mileage, smooth, and cheap as hell to get parts for. They are also known for going well north of 200K without major problems. It's a plus that everyone knows what you are talking about when I say "this thing's got a 350".
    Last edited by moman; 07-05-2005 at 02:52 PM.

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    5.3 Liter Vortec V8 Corr69's Avatar
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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    What year is your 350?
    Would you say its more powerful than the 99 5.3L or the 2001?


    1997.5 Buick Regal GS : 4'' Fenderwell CAI, Headers, 3.4'' Pulley, Catback, Tune.

    Mid 13s run after run after run.

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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    Quote Originally Posted by Corr69
    What year is your 350?
    Would you say its more powerful than the 99 5.3L or the 2001?
    My 350 is a 1993 with TBI, so it's running 225 HP/280 TQ (somewhere around there), so it's quite a bit less powerful than the new 5.3L.

    The Vortec system in 1996 (sequential fuel injection, better flowing heads, tighter computer controls) made a 30 HP difference alone.

    Of course, it's paid off so I'll take the power cut

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    5.3 Liter Vortec V8 Corr69's Avatar
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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    My dad had a 93, but he siad there was a quite large differnce in performance between 1993 and 1998, he did say that motor has really good torque


    1997.5 Buick Regal GS : 4'' Fenderwell CAI, Headers, 3.4'' Pulley, Catback, Tune.

    Mid 13s run after run after run.

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    GMI Staff Member Premium Member nailhead425's Avatar
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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    The Gen III/IV small blocks are vastly better than the old 350. The heads flow better, emissions are lower, the torque curve is flatter, they get better mileage, and they have much greater potential output. The 1st generation small block was and still is an excellent engine, but the Gen III/IV are better.
    Who is John Galt?
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    5.3 Liter Vortec V8 zeobandit's Avatar
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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    I wouldn't mind seeing the LS1 put into the new GMT-900s as an option. The LS2 can then be used in the SS versions.

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    5.3 Liter Vortec V8 Corr69's Avatar
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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    Yeh that would be nice, but maybe the 5.3l had enough in the trucks, keep the motor as the ls4 and bring make the 5.7L for the silverado


    1997.5 Buick Regal GS : 4'' Fenderwell CAI, Headers, 3.4'' Pulley, Catback, Tune.

    Mid 13s run after run after run.

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    6.2 Liter LS9 Supercharged V8 member12's Avatar
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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    I used to have a '95 silverado with a 5.0L engine. It had good power, and pulled the trailer a hell of a lot better than the trailblazer, but it got bad mileage. I wish it had a 350. Anyone know the hp/torque rating on the 5.0L?

    It sure lasted a long time. 165K and still running.

    I miss my truck.... It now serves as a 3rd vehicle for my parents, so I still get to drive it and wash it.
    Last edited by member12; 07-06-2005 at 11:05 PM.

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    5.3 Liter Vortec V8 Corr69's Avatar
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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    Does it have a vortec?
    the vortec 5.0l had 230 hp, and 285 ft-lbs torque


    1997.5 Buick Regal GS : 4'' Fenderwell CAI, Headers, 3.4'' Pulley, Catback, Tune.

    Mid 13s run after run after run.

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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    Vortec didn't come out until 1996.

    It was new heads, new FI, and new computer controls

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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    The 305 (5.0) was a great motor, too bad it never got the recognition it deserved....

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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    In a truck motor you want usable power. As far as usable power goes the Vortec 350 blows the new 5.3 off the chart. Look at the toque curves and you'll know what I mean.

    The 350 had 300 ft. lbs from 1800 rpm up to 3700 rpm with a peak of 325.
    The 5.3 has 300 ft. lbs from 2500 to 3500 with a peak at 3500 rpms.

    My dad is very disappointed with the new 5.3 in his 2001 and drove a 1997 with a vortec 350 and wants to do a swap to the old 5.7 if he could.

    He also drove a new 5.7 hemi and it caused him to be further diappointed in the new 5.3. It (the new 5.3) just doesn't have the low end grunt that you are looking for in a truck motor.

    Besides, I've seen a 350 vortec motor with a TBI unit built to produce 405 hp and 485 ft. lbs of torque with cam and computer upgrades. And these particular motor was in a 1991 4x4 suburban with 35" tires and 4.10 gears and managed 19mph on the highway.

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    2.4 Liter SIDI ECOTEC ockgator's Avatar
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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    Read somewhere that main reason for new engines was tightening emmission controls. In 07 they get tighter and 350 may not have been cost effective to make them meet regs. I think GM would've liked to keep 5.7 as all the tooling and dies had paid for themselves many times over, and still are paying their own way. Actually both engines are more similar than different. Cast block, OHV design, single cam in center of block, same 4.4 inch bore centers.
    I went from 98 K1500 5.7 to 02 K2500 8.1 so I can't really give a good comparo, 98 had good power and decent mpg, but when cattle trailer was loaded engine ran outa steam about 3400rpm, 8.1 no power problems at all

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    Re: The discontiuation of the 5.7L Vortec, Was it the Right Move?

    [QUOTE=moman]IIRC, GM changed the engines to a large degree because of the intense media pressure bashing GM for using "30 year old engine designs" while Ford had the
    "new OHC V8" pieces of crap in their trucks.


    that doesnt make any sense, the 5.3 is a 327 CID/ around 300HP. Just like how they brought them out in the 60s.

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