I'm not talking about the 6.0L powerstroke, I was talking about Gms 6.0L vortec which the two I've been in have yet to impress me, yes both were autos, heck the one had a hard time towing an emty 24ft aluminum stock trailor. Neither were very fast.

 

I was talking about the GM gasser as well. I always hear people talking about how much better the 6.0L is compared to the 5.4L. Am I missing something?

 

It is better but has the same charactoristics as the 5.4L in the SD. The 6.0 was only avalable in the heavy half and up which is the same as putting the 5.4L in a SD. I think in a half ton it sould be awsome. I probably made to broad of a statement buy saying all 6.0Ls, I rode in a GMC Yukon denalli and that seemd to have some get up and go, unfortuanaly I don't think the pickups get the hotrod version of this engine, I could be wrong though!

 

GM's 6.0 is no slouch - even in a 3/4 or one ton truck. Like LH said, it has a very flat torque curve and keeps on building up all the way up to 4000 RPM's. Until the advent of the 3 valve, the 5.4L reached peak torque at 2500 RPM and it was all down hill from there. Both had comparable off idle torque as well.

Really the GM 6.0 is just about as good as the 275HP Triton V10. It gives up displacement and torque, but overall performance was pretty close. 6 liters is still nothing to whiff at. And having 300 HP from a base engine was unheard of at the time also. I found it interesting that various towing tests conducting by the magazines actually favored the 6.0L of these two.

I don't know why GM autos have the reputation they do for sucking up power. I've heard dyno claims that the 4L80e is good for 30+ HP. The Allison is good for 40-50HP!!!..according to guys who have dyno'ed they're Allison trucks in comparision to those who have done so with the ZF six speed.

I've only ever driven a 6.0 with automatic. The 4L80e (though a tough tranny) only has a first gear of 2.48:1. Compared to a 5.4L SD with the Torqueshift first gear of 3.09:1.That's going to make a big difference in percieved low end.

I do know one thing, if the difference between the 6.0/4L80e and 6.0/NV4500 is anything like the difference between the 5.7 (350) with auto or 5speed, then it's going to be a HUGE difference. The only 350/NV4500 I drove, felt like it had a ton more get up and go than any of the million or so 350/auto combos I've driven....and then there's granny gear...lol, gotta love a manual.

 

Just about as good as the 275 hp triton v10? The 275 hp version was only offered 1 year, and it still had 410 or so lb-ft of torque. There's no way that a 6.0 chevy can compare to the v10.

 

Actually, in '99 one of the mags tested the 2 and the GM waxed the V10.

Before you cry unfair weight advantage (like I did) they each towed one another on the same trailer and the 6.0 still smoked our mighty V10.

It almost made me wonder if that was the main reason for such a big power jump after only one year.....275 to 310HP.

 

And you know this how? Please don't say common sense, because common sense dictates that to a certain point everything is comparable. It must be something else.

Anyway, just for your enlightenment, I'll go into a bit of detail - I'm not going to go looking for any links to any articles - if your interested enough you will find them. i'll give you the short version.

2500HD 6.0L auto trans 4.10 gears.
VS
Ford SD F250 auto trans 4.30 gears.

Each truck was timed empty and with loaded trailers. The 6.0L had better times in both categories. To equal the weight being pulled by each engine, each truck pulled the other up a 3% grade on a loaded trailer - since the Ford weighed more. So the 5000lb GM had to pull a 6000lb Ford on a 3000lb trailer. This way the GM truck didint benefit from being lighter as would be the case if both trucks were simply pulling a 5000lb trailer - yet the Ford still retained it's gearing advantage.

This is not so suprising when you think about it. Even today's 3 valve V10 gives up quite a bit of low RPM torque to the 6.0PSD, yet to a certain point the V10 will pull just as well if not better - provided proper gearing to match its powerband.

If they had been running 16000lb 5th wheels in this contest, I'm sure the V10's torque advantage would have been the telling factor, all the same, it proved that the 6.0 had more than enough torque and overall performance to win out at this level combined weight rating. This is why I said;

"Really the GM 6.0 is JUST ABOUT as good as the 275HP Triton V10."

It's quite a bit of motor for a base engine if you ask me.

 

Haha Dohc Beat Me Out

 

I would like to see the article as the 99 6.0l in my buddies 3/4 ton chevy (light 3/4) was a gimp once that stock trailor was on. Heck it was a 24' aluminum gooseneck, the dang thing doesn't weigh more than 3-4k lbs emty and he couldn't gain 1 measly mph up the same hill my V10 with 3.73s and 33" tires can gain over 10mph falt out with dang near 9k behind me (boat and camper together). I should get get him on here as he won't argue this and he's a die hard bow tie boy. like I said earlier the only one that seemed to scoot was the 05 denalli, which I was quite impressed with after the disappointment of my buddies 99'. Oh and by the way just for the record I get better Mileage out of my 415CI V10 than he gets out of his 6.0.

 

Base engine in what , a 3/4 ton, when it belongs as a nice upgrade for the 1/2!!

 

[ y is it that all the car coponies are trying to bring back all this stuff, the only one able to talk is the ford mustang, cuz it really capturs the muscle car, but the new charger, GTO, HEMI, rumble bee, and daytona shouldent even try, now i am a chevy fan but it's my onist opinion.[/QUOTE]
yes ford nailed the mustang like no other co. has been able to but u cant take anything a way from the gto it is bad

 

Why is it when I read a GM supporter's post, I get a massive headache?

 

SLE, are you comparing your '03 V10 to your buddy's 6.0?

You know we're talking the '99 V10 which didn't exactly set the world on fire. In fact, a lot of the 460 owner's whining about the "new improved V10" were because the 275HP motor was not a great improvement over the previous year 460.

 

Maybe you can explain for me why it is some people feel this absolute NEED to knock down the next guys ride. Can you? I mean the poor 5.4L guys can't catch a break from V10 owners, who in turn get taunted and ridiculed by PSD guys for not antying up the dough for a "real truck engine".

This goes round and round. Part of it is pure ignorance really. A truck is the sum of every component working together - and some engines can be made to work as well as others under similar circumstances using different components - it's as simple as that. Of course everything has a limitation and some engines have higher limitations than others, but if were working within the design and power parameters of the smaller engine - then the comparision is valid.

If I were towing at max GCWR for a V10 - the 6.0 would not even be a consideration - it would be way over max GCWR. In fact, if I were going to be towing at or near the 6.0L's max GCWR consistently, I would rather be towing that weight with the V10 - just for the extra piece of mind of having some GCWR left over. But it goes two ways from here. If towing up to around 8K or so - I'd feel just as comfortable with it being behind a 6.0 as opposed to a V10. On the flip side, if I were going to be towing heavy all the time I'd actually rather have the Vortec 8.1L - regardless of ratings, there's no way a V10 will throw you back in the seat the same way an almost 500 cu in big block will from a dead stop - no replacement for displacement.

So which of these three views is right? Take your pick, and don't worry that the next guy has something else which might be better in one way or another. They're all right - depends on which is for you. All will work as long as your within design parameters. For me the 6.0 would only be considered with manual transmission. If an auto were a requirement - it would come down to the 8.1 or V10 - and most likely the V10 as the Allison is known for sucking up too much power. With 6 speed I'd go 8.1 for towing heavy.

I can tell you I'd take a 5.4L with 6 speed and 4.10's over a V10, auto with 3.23's for towing - see the point?

As far as your mileage goes - there are a ton of variables there too. I've heard of 8.1's which can get 15.5 mpg hwy at 65 mph. The only problem is
it will use almost as much oil in that same 15.5 miles from what I hear...lol.

Really you should appreciate a guy like me. I'm going with the 6.4 twin turbo PSD in 07 now that I see Ford has'int lost their minds with the TONKA. You will still see me around here, and I won't be one of those who pokes or prods the gas guys, or who is un willing even to discuss the pros and cons of HD gasoline engines for work/commercial use - everything has it's place.

 

Frank, do you still have the landscaping business?