Suburban 2500…6.0 vs 8.1 vs Excursion V10

Gale Hawkins wrote:
If not tuned right the Chevy Big Blocks would be a dog I have been told but if they set up right they just would not quite pulling even at low RPM's. I have no complaints about our 454 TBI in the MH and it was only rated at around 210 HP I think. It got us up the Old Priest Run going into Yosemite NP when we took it by mistake. That was a four mile grind at WOT in 1st gear going about 15 mile per hour and I was thankful we had the smaller metric tires to boot.

The Chevy big block era started like 45+ years ago add a long run and are past tense for the most part as daily drivers but still make for great trucks.

Right on and a lot has to do with how it is broken in, taken care of
and the level of materials used for maintenance & add ons

Must admit that it's down on HP with +161K miles (indicated, but
should be about 7% more 'cuz of over sized tires), but power mode
still comes on whenever I nail it. That is what Burbman and the others
are talking about 'fly by wire'...ECU (engine computer unit) controls

My 1996 7.4L was just Calif SMOG'd. My mechanic and the speciality
SMOG shop continue to be amazed a the results. My 7.4L tests lower
than most cars in the whole state


Here is proof...the SMOG test results


Notice that it lists my curb weight for a K2500 7.4L with SLT (highest
trim level) at 5,250lbs. I've weighed it at the county certified
measures and weights certified scales at ~7,200 lbs with me (180)
toolbox (+200) and misc stuff (about 75lbs). Both mechanic and SMOG
tech says they don't put in the weight, as the state program plugs it
in for all vehicles based on OEM DB (curb)



A better image of the results...NO is always higher at speed and think
due to how much BTU's the big block puts out off idle