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5.3L vs 6.2L V8


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1 hour ago, KARNUT said:

The whole point of this thread has been missed like usual. Which engine is better was the question. They’re all good. Which is faster? That depends on the options. Someone says the the hemi is slower than the 5.3. You can get a hemi in a 2 door truck called RT. GM doesn’t do that. Ford puts their fast engine in a 2 door. They run on reg gas. Toyota use to do a dealer installed S/C. I haven’t checked lately, maybe they still do. They’re all fast. The fastest? You’re looking at the wrong brand. GM isn’t building performance trucks. Even though they perform well.

Well said.

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7 hours ago, N55_6MT said:

Again, this isn’t true. It takes the same amount of power to accelerate the same mass at the same rate, no matter the engine or how much power it can produce.

 

Assuming mass, rolling resistance, drag ect. were the same you could take a truck with a 5.3 and a truck with a 6.2, set them side by side, accelerate them at the same rate they would take the exact same amount of power get to the same speed. 
 

You’re only using that extra power when you’re commanding more output than the other engine could deliver at a given RPM at WOT. That’s why it’s extra power.

 

I’m pretty happy with my 5.3 because it delivers more than enough power for the workload I require. For day to day driving around town I never come close to maxing out the engine, it’s only when towing that I begin to utilize the full output of the engine and would begin to “feel” any difference.

 

You missed my point; I'm not claiming that the one truck uses 500 hp to get from 0 to 60 in 15 seconds and the other use 300 hp.

 

What I'm saying, is that due to massive differences in HP and torque, these trucks accelerate differently. You don't ask the truck to give you 150 HP. You push the pedal down until the truck moves at the speed you want it too. The v6 simply needs to wind up higher in the RPM band to make the same amount of power that the 6.2 does just off of idle (ok, slight exageration, but you get the point), and needs to downshift far more often than the 6.2 when you want to get a little more power out of it to pass or to roll up a hill etc.

 

So yes they take the same amount of power to get up to speed (assuming same truck and same weight), but because the engines make different power at different rpms, the one truck needs to scream and rev out, and the other just yawns and loafs at 1500 rpms. The RPMS at which these trucks accelerate at the same speed, is much much different.

 

You notice that in your truck everytime you make it work to make it move. The effect on you as the driver, is that you're always flogging the s__t out of your v6 to make it move.

 

Have you guys not driven a diesel before? Same effect there.

 

Maybe you and Grumpy just have no feeling for this kind of thing. You just want to drive an appliance. All the more power to you (he he), then you're definitely in the right truck for you.

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18 hours ago, JimCost2014 said:

There's always your next truck.

 

Sorry, too many pages, did not realize it was a hypothetical question.

 

Good post thought, getting people all fired up, I like it.

I never imagined that after asking if the benefits of one engine outweigh the other, that people would be yelling at each other about piezoelectric knock sensors.

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56 minutes ago, Ferrari Eater said:

I never imagined that after asking if the benefits of one engine outweigh the other, that people would be yelling at each other about piezoelectric knock sensors.

Let me welcome you to the site a second time, if you want to have fun, start a post about your favorite brand of ???, and how often you change/replace it.

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I never imagined that after asking if the benefits of one engine outweigh the other, that people would be yelling at each other about piezoelectric knock sensors.

It’s always like that. This is why my friends are shocked that I participate in a forum! I’m sure that the Chinese Virus has a lot to do with the attitudes but there’s not one discussion that doesn’t involve a couple idiots that spring up out of the cracks just to cut someone down for not agreeing with them.


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10 hours ago, the wanderer said:

The point is, you do use that extra power, constantly. Every RPM your truck is at, the 6.2 is making more power at the same RPM. Even mild acceleration, the 6.2 does it easier and more effortlessly. You don't have to be WOT throttle to notice it.

 

Want to go from 0 to 60 in 15 seconds? Yup, both can do it.

Want to go from 0 to 60 in 10 seconds? Yup, both can do it, but the 4.3 is straining at this point. The 6.2 is still sipping its morning coffee.

Want to go from 0 to 60 in 7 seconds? Oops, You can't.

 

That's the issue; the effort it takes to increase your acceleration. The more you want to increase it, the more you notice the difference.

 

I can't believe this is such a hard concept for somebody who, you know, knows complex things like formulas and sh_t. I have to believe you're trolling at this point because nobody can be that dense.

https://www.motortrend.com/cars/gmc/sierra-1500/2014/2014-gmc-sierra-regular-cab-first-test/

 

Could it be that is because I deal if facts and no fantasy?

 

7.4 second 0-60 times not struggling at 10 seconds. 

Yes the 4.3 will do 0-60 in 7 seconds. 

That sort of thing will get you tickets. 

 

 

The one in this test is a 4X4 and several hundred pounds heavier than my base WT1. Pepper is a bit quicker than this and over 116,000 miles has averaged over 27 HAND CALCULATED mpg. Entire summer of 2019 not a tank under 30 mpg. 

 

Tell ya what. I'm going to give you the last word and will not reply to your next post. IN fact I'll turn my back (leave the thread and not read your reply) so you get a nice clean cheap shot at me. Hows that? (Troll was still above the belt LOL) 

 

 

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49 minutes ago, Grumpy Bear said:

https://www.motortrend.com/cars/gmc/sierra-1500/2014/2014-gmc-sierra-regular-cab-first-test/

 

Could it be that is because I deal if facts and no fantasy?

 

7.4 second 0-60 times not struggling at 10 seconds. 

Yes the 4.3 will do 0-60 in 7 seconds. 

That sort of thing will get you tickets. 

 

 

The one in this test is a 4X4 and several hundred pounds heavier than my base WT1. Pepper is a bit quicker than this and over 116,000 miles has averaged over 27 HAND CALCULATED mpg. Entire summer of 2019 not a tank under 30 mpg. 

 

Tell ya what. I'm going to give you the last word and will not reply to your next post. IN fact I'll turn my back (leave the thread and not read your reply) so you get a nice clean cheap shot at me. Hows that? (Troll was still above the belt LOL) 

 

 

 

https://www.gm-trucks.com/forums/topic/239123-53l-vs-62l-v8/?do=findComment&comment=2421489

 

The engines make different power at different RPM's. Thus you have to rev/flog the v6 more to get the same power out of it. The revving and flogging is subltly interpreted by us as feeling "weak" and "underpowered", vs an engine that can make the same power but at a much lower RPM.


I cannot make it anymore clear than this.

 

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Guilty. I love trucks, these GM trucks as well, and almost bought one so joined the forum before that. Still check in just for kicks.

You’re definitely missing out on the pleasures of owning the 6.2. Btw, I whooped a new ram getting onto the freeway, it just couldn’t keep up and I’m lifted with just a SuperChips Tune. These 6.2’s are beasts lol.
6635bff7e37206739f957422cbe20c44.jpg


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1 minute ago, TXGREEK said:


You’re definitely missing out on the pleasures of owning the 6.2. Btw, I whooped a new ram getting onto the freeway, it just couldn’t keep up and I’m lifted with just a SuperChips Tune. These 6.2’s are beasts lol.6635bff7e37206739f957422cbe20c44.jpg


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Trust me, I wanted a 6.2 with the 10 speed in the worst way. But GM didn't offer that in their lower trims. So first I'd have to pay extra to get into the correct trim, then pay yet again to upgrade power train. Combine that with the fact that Ram's discounts on equivalent packages were much much higher... yeah, I couldn't swing it financially. I mean I have the money, it just didn't make sense to me.

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Trust me, I wanted a 6.2 with the 10 speed in the worst way. But GM didn't offer that in their lower trims. So first I'd have to pay extra to get into the correct trim, then pay yet again to upgrade power train. Combine that with the fact that Ram's discounts on equivalent packages were much much higher... yeah, I couldn't swing it financially. I mean I have the money, it just didn't make sense to me.

Understood. Ram does have an awesome and rock solid Hemi though with an outstanding growl coming from the exhaust on either cold start or just idling, no need for an exhaust system.


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Holy moly. Someone is passionate about this topic.
Lol yeah. When it's a large portion of your career, hard not to be. Misinformation is frustrating and helps no one.

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2 hours ago, the wanderer said:

 

You missed my point; I'm not claiming that the one truck uses 500 hp to get from 0 to 60 in 15 seconds and the other use 300 hp.

 

What I'm saying, is that due to massive differences in HP and torque, these trucks accelerate differently. You don't ask the truck to give you 150 HP. You push the pedal down until the truck moves at the speed you want it too. The v6 simply needs to wind up higher in the RPM band to make the same amount of power that the 6.2 does just off of idle (ok, slight exageration, but you get the point), and needs to downshift far more often than the 6.2 when you want to get a little more power out of it to pass or to roll up a hill etc.

 

So yes they take the same amount of power to get up to speed (assuming same truck and same weight), but because the engines make different power at different rpms, the one truck needs to scream and rev out, and the other just yawns and loafs at 1500 rpms. The RPMS at which these trucks accelerate at the same speed, is much much different.

 

You notice that in your truck everytime you make it work to make it move. The effect on you as the driver, is that you're always flogging the s__t out of your v6 to make it move.

 

Have you guys not driven a diesel before? Same effect there.

 

Maybe you and Grumpy just have no feeling for this kind of thing. You just want to drive an appliance. All the more power to you (he he), then you're definitely in the right truck for you.

Not to keep talking in circles here, but I haven't missed your point. I've totally agreed with you that the 6.2 will loaf along happily at times when the 4.3 or 5.3 would be in a lower gear. The point I'm making is that there is nothing wrong with that, and not something I encounter much in day-to-day driving. I've driven trucks with the 5.3 and the 6.2 over the years and to me the "feel" has always been much more stark up until this generation when the transmissions are the same. I drove a 10spd 6.2 Denali and a 10spd 5.3 SLT back to back fully expecting to be lusting after the 6.2.  To my surprise, the difference at normal levels of acceleration (i.e. not breaking the law) was imperceptible because the 5.3 is already plenty capable for the job of driving my groceries around. 

 

At the end of the day you shouldn't be caring a whole lot if a engine is running at higher RPM or a lower gear, all you should care about is capability and if your chosen engine has the ability to do the task you're asking of it while delivering the economy you need. The differences between the engines only show up when you start getting near the limit of the engines capability, up until then it's just not that big of a deal. 

 

And yeah, my truck is kind of an appliance. I didn't buy it for a sporty drive or to have neck-snapping acceleration, I've got other cars for that (see my user name). I bought it so I can tow my TT, haul ****** to the dump, pick up groceries and drive to work occasionally. And that's OK...

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