Trading my 15 5.3 for 18 6.2

[2014KL]

You said it.   There's no replacement for displacement!

[TXGREEK]

Amen!


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[barrrf]

Unfortunately........physics has everything to do with it.

The 5.3 and the 6.2 are identical in design. If you take and remove the engines from their trucks and put them on dynos, the 6.2 WILL ABSOLUTELY USE MORE FUEL. All things being equal, you cannot make more HP without using more fuel. It is impossible.

You can alter designs, get efficiency gains, etc and that all helps but thats not what we're discussing here. We're comparing 2 almost identical engines.

Now, put them back in their trucks - lets say CCSB 4x$ and load them up with like 7k lbs on a trailer. The 6.2 will out tow the 5.3. Again because physics. At cruise, the 6.2 might actually use less fuel when loaded because it isnt laboring as hard as the 5.3 might be. It wont be much of difference. The engineers tune all aspects of these 1/2 tons to be most efficient unloaded at highway speeds.

 

TXGREEK - youre whole "there is no replacement for displacement" and "God Bless Murica" statements say pretty much what everyone needs to know about you. Im actually surprised youre buying vehicles with fuel injection. But I digress. My issues isnt with your opinions. My issue is with you spreading false information. If your 5.3 was getting 11mpg then you had a modded truck with heavy tires or your engine was ****ed. Simple as that.

[TXGREEK]

Unfortunately........physics has everything to do with it.

The 5.3 and the 6.2 are identical in design. If you take and remove the engines from their trucks and put them on dynos, the 6.2 WILL ABSOLUTELY USE MORE FUEL. All things being equal, you cannot make more HP without using more fuel. It is impossible.

You can alter designs, get efficiency gains, etc and that all helps but thats not what we're discussing here. We're comparing 2 almost identical engines.

Now, put them back in their trucks - lets say CCSB 4x$ and load them up with like 7k lbs on a trailer. The 6.2 will out tow the 5.3. Again because physics. At cruise, the 6.2 might actually use less fuel when loaded because it isnt laboring as hard as the 5.3 might be. It wont be much of difference. The engineers tune all aspects of these 1/2 tons to be most efficient unloaded at highway speeds.
 
TXGREEK - youre whole "there is no replacement for displacement" and "God Bless Murica" statements say pretty much what everyone needs to know about you. Im actually surprised youre buying vehicles with fuel injection. But I digress. My issues isnt with your opinions. My issue is with you spreading false information. If your 5.3 was getting 11mpg then you had a modded truck with heavy tires or your engine was ****ed. Simple as that.

Hey Bart! Is there something mentally wrong with you, seriously? I’ve stated a fact about my experiences and apparently you take offense to it as well as my saying God Bless America. No body cares what you think Troll, attacking my character in an attempt to get your point across shows the kind of person you are so go back into the hole you creeped out of and don’t forget to take your med.


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[Nasty]

19 minutes ago, TXGREEK said:

Hey Bart! Is there something mentally wrong with you, seriously? I’ve stated a fact about my experiences and apparently you take offense to it as well as my saying God Bless America. No body cares what you think Troll, attacking my character in an attempt to get your point across shows the kind of person you are so go back into the hole you creeped out of and don’t forget to take your med.


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I stated a fact about my experiences as well. And people are getting on me    welcome to the club

[SILVER SLED]

If I may interrupt, the trim on this LTZ Z71 is very cheap looking.  Not only is it not chrome, which is fine, its all rubber. Overall this Redline edition and apparently all Z71's look cheap now.  My LTZ Z71 Redline edition looks kinda like an LTZ Z71 work truck edition.

[barrrf]

35 minutes ago, TXGREEK said:

Hey Bart! Is there something mentally wrong with you, seriously? I’ve stated a fact about my experiences and apparently you take offense to it as well as my saying God Bless America. No body cares what you think Troll, attacking my character in an attempt to get your point across shows the kind of person you are so go back into the hole you creeped out of and don’t forget to take your med.


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Nope, mentally stable here. Just tired of BS.

I do like how you say I was trying to get my point across by putting you down.................by putting me down. Makes total sense.

[TXGREEK]

I stated a fact about my experiences as well. And people are getting on me    welcome to the club

Lol, they’ll just let anyone in these forums but I guess there’s no way of filtering the loonies out.


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[2014KL]

The 6.2 and 5.3 are NOT identical besides displacement.   The 6.2 has higher compression, different heads, intake throttle body etc.   Hence why gm recommends/requires premium in the 6.2 and not the 5.3 and why the 6.2 will give you all the gravy and the 5.3 wont.

[truckguy82]

18 hours ago, barrrf said:

If you were only getting 10-11mpg in the city with your '14 5.3 then you had mods done or there was something really wrong. On my '14, prior to the level and heavy ass BFGs, I was getting 17-18 around town and up to 25mpg on road trips that didnt involve the freeway (so set cruise at 61mph and drive).

All things being equal, physics says the 6.2 cannot get better mileage than the 5.3.

Nope, 10-11mpgis about right for these trucks is real city traffic/dense suburbia. I’m getting about 9-10mpg right now in the winter.

 

if you’re getting 17-18mpg, there is no way your definition of “city” is similar. Nobody on this earth is getting 17-18mpg in a 2014+ Gm 1/2 ton truck in actual city traffic. (City = Coming to a stop every 1/4-1/2 mile or so)

 

to quote you, physics says 5500lbs can not come to a stop and then accelerate every 60 seconds and get 17mpg in a modern gasoline ICE engine without being a hybrid.

[truckguy82]

6 minutes ago, 2014KL said:

The 6.2 and 5.3 are NOT identical besides displacement.   The 6.2 has higher compression, different heads, intake throttle body etc.   Hence why gm recommends/requires premium in the 6.2 and not the 5.3 and why the 6.2 will give you all the gravy and the 5.3 wont.

Well they are nearly identical by design and function. Like identical twins but one being a boy and one being a girl. (Sorry 5.3 guys lol)

[truckguy82]

1 hour ago, barrrf said:

Unfortunately........physics has everything to do with it.

The 5.3 and the 6.2 are identical in design. If you take and remove the engines from their trucks and put them on dynos, the 6.2 WILL ABSOLUTELY USE MORE FUEL. All things being equal, you cannot make more HP without using more fuel. It is impossible.

Well I mean a higher hp motor will indeed use more fuel to make more power, that’s kind of irrelevant because it’s canceled out by the increased in velocity. I mean miles per gallon is fuel used over distance. The quantity of fuel injected into the combustion chamber is an irrelevant figure by itself as far as efficiency.

 

Random example that has completely fabricated numbers- 

6.2 at WOT 0-60 mph - 400cc per combustion for 5.5 seconds

5.3 at WOT 0-60 -330cc per combustion for 7 seconds

 

They might use the same amount fuel.

 

Just trying to explain that more power is not necessarily more fuel consumption, not just while cruising, but at WOT as well.

[pickmeup]

What is the weight of these 2 vehicles ? More important what is the weight disparity between the two trucks ? Power to weight ratio going to play a big part too if their happens to be say 700 lbs.

[truckguy82]

7 minutes ago, pickmeup said:

What is the weight of these 2 vehicles ? More important what is the weight disparity between the two trucks ? Power to weight ratio going to play a big part too if their happens to be say 700 lbs.

5.3 and 6.2? Maybe like 50lbs from the forged guts, bigger exhaust, and beefier rear diff, and whatever else is beefier.

 

The real difference is body styles.

 

I'm pretty sure 4wd double cabs and crew cabs are around 5500lbs

I'm pretty sure 2wd regular cab is about a 1000lbs lighter

 

What's amazing is the a 385hp (5.3 on e85) pushing 4500lbs and a 6.2 crew cab run about the same 1/4 mile time (~14.0@100mph)

 

e85 5.3 RCSB = 11.68lbs per horsepower

6.2 CCSB = 13.09lbs per horsepower

 

I think the only explanation is that the 6.2 is god's engine.

 

 

 

 

[pickmeup]

Yep I agree.. It got more s'more .lol