6.2 Chevrolet vs. 6.9 Ford vs. Early Cummins Dodge

[spence13e]

Originally Posted by travisg96

They used the 6.5 in the hummers. And the military still uses the 6.5. Just goes to show how our government is throwing it's money away.

if you go back to my last post that's exactly what i was talking about. and they used NA 6.2 & 6.5 or the turbo 6.5. the NA's are gutless even with an empty hummer. the 6.5s aren't THAT bad on the armored stuff (12 to 15k in weight w/ 205HP & 440ft/lb).

and you say the government is throwing away it's money - how might i ask is that? they're not the GREATEST engine around but they ARE simple for a 63B to repair in combat. i thought it'd be cool if they'd drop any of the current diesels in them but they're just too complicated to be practical for all situations, especially combat.

those old GM powerplants aren't the best, definitely lacking in power, but they did what they were designed to do: be long lasting and get good mileage.

YMMV

[nitrogen]

as far as burbs go ford never did have anything to compete with them until they came out with the excursion, and now their gone.really though for everyday heavy half tons the old 6.2 got you there without too much fuss and for minimal fuel useage

[460429_freak]

yeah if ford was to made the excursion or the expidition back in the 70-80's chevy suburbans wouldn't be so hot now.... imagine a 77 ford expiditon.. and not a centerion either... I have been thinking (checking on cost) of having a 4 door converted with a bronco back but unlike the centerion I would not have the frame shortend but it just add the differnce in the body and maybe make it 4 row of seating and/or make it where you could still tow a goose neck... still working on this ideal... yeah the burb is going to be the cheap go in the snow vehicle for me for work...

[origcharger]

Originally Posted by mistakenID

Short history lesson:
The 6.9L, 420-inch V-8 produced 175 hp and 318 lb-ft of torque with 20.7:1 compression. It featured IDI (Indirect Diesel Injection), which used a mechanical pump-line nozzle injection system that metered fuel into a small pre-chamber in the head before it was mechanically injected into the combustion chamber right before TDC. In 1984, a boost in compression to 21.5:1 jumped torque to 338 lb-ft, but there was no horsepower gain.

"metered fuel into a small pre-chamber in the head before it was mechanically injected into the combustion chamber"

I don't believe this is an accurate description of the 6.9 fuel injection process as wasn't the fuel simply injected into the prechamber which started the combustion process.