Is this 5.7L a secret,96/02 G2500/G3500 vans

[Hudson Hawk 97]

So according to GM the engines used in these heavy duty vans are different than a 5.7 in a 1500 truck. GM says they are 300 to 330 horse with HP crank shafts, rods, timing set(true roller). Has anyone else heard of this

 

[MIHELA]

I know the 8600+ GVWR engines were 4 bolt mains and had hardened exhaust valves and inserts. They had slightly different head castings but the blocks are the same otherwise as far as I know. Maybe somebody else can chime in, vans are weird sometimes.

 

[HotWheelsBurban]

A factory stock vortec with LS horsepower? Tell us more about this unicorn!

 

[Hudson Hawk 97]

14088526 crank shaft, 880 block has provision for manual fuel pump,high volume oil pump w/.750” pick up tube,rods are 10108688,roller timing,14088783 chain,14088784 crank sprocket 12552129 cam sprocket.

 

[Hudson Hawk 97]

14088526 crank shaft, 880 block has provision for manual fuel pump,high volume oil pump w/.750” pick up tube,rods are 10108688,roller timing,14088783 chain,14088784 crank sprocket 12552129 cam sprocket.

And 880 4 bolt block

 

[arrg]

Would love to see where you got this info "according to GM".

 

[stutaeng]

As far as I know it's just 4 bolt main and the valves, as mentioned. Some places like Jegs have these listed and it says for "Heavy duty use only," or something to that extent.

I don't think the HP was any higher than the truck versions, so 255 or so?

They are work vans, so they typically don't get the "latest and greatest" engines, i.e., high HP. Rather, they get the high durability/reliability engines.

It's typical for manufacturer to "detune" engines in heavy duty applications for that reason.

 

[Hudson Hawk 97]

Would love to see where you got this info "according to GM".

Those numbers came off the parts, so if you look them up read the notes

 

[Hudson Hawk 97]

As far as I know it's just 4 bolt main and the valves, as mentioned. Some places like Jegs have these listed and it says for "Heavy duty use only," or something to that extent.

I don't think the HP was any higher than the truck versions, so 255 or so?

They are work vans, so they typically don't get the "latest and greatest" engines, i.e., high HP. Rather, they get the high durability/reliability engines.

It's typical for manufacturer to "detune" engines in heavy duty applications for that reason.

Sounds logical, guess that’s the reason for the 906 heads instead of 062s. With a little port work and some valve lift/ duration with springs to match it may make a nice performer

 

[skylark]

It is just a numbers game. The vortec 350 is rated at 255 horsepower with all the accessories. It is rated at 330 horsepower without any of the accessories.