Topic: First Drive: 2019 GMC Sierra Elevation 2.7T

[Great_Big_Abyss]

You can't just look at torque when determining tow ratings, but also HP.  HP is the amount of work an engine can do.  Take pulling a trailer up a long grade.  That is work.  A Higher horsepower engine will do it faster than a lower HP engine, regardless of torque.

It gets confusing though, because HP is a function of torque and RPM.  So generally, the higher the torque, and the higher the rpm, the higher the power number.

I'm guessing If you look at Ford's 2.7TT, it builds a lot torque at low rpm, which is great for tooling around town, but then falls flat on its face at higher rpm, which is bad for trailer towing.

[dirtyjeffer]

^^ this.

it's why many prefer a nice V8 as a regular work truck (tow, haul, etc)...there's also the potential concern for longevity...to be fair, most modern turbo engines seem to be fairly decent, but a NA V8 is almost bulletproof now, since they've been around forever.

[EV-Light]

You can't just look at torque when determining tow ratings, but also HP.  HP is the amount of work an engine can do.  Take pulling a trailer up a long grade.  That is work.  A Higher horsepower engine will do it faster than a lower HP engine, regardless of torque.

It gets confusing though, because HP is a function of torque and RPM.  So generally, the higher the torque, and the higher the rpm, the higher the power number.

I'm guessing If you look at Ford's 2.7TT, it builds a lot torque at low rpm, which is great for tooling around town, but then falls flat on its face at higher rpm, which is bad for trailer towing.

For sure, that’s exactly why people prefer diesels to tow....lots of horsepower to boot!


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[Great_Big_Abyss]

You can't just look at torque when determining tow ratings, but also HP.  HP is the amount of work an engine can do.  Take pulling a trailer up a long grade.  That is work.  A Higher horsepower engine will do it faster than a lower HP engine, regardless of torque.

It gets confusing though, because HP is a function of torque and RPM.  So generally, the higher the torque, and the higher the rpm, the higher the power number.

I'm guessing If you look at Ford's 2.7TT, it builds a lot torque at low rpm, which is great for tooling around town, but then falls flat on its face at higher rpm, which is bad for trailer towing.

For sure, that’s exactly why people prefer diesels to tow....lots of horsepower to boot!


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Diesels are a completely different ball game, and have a lot of torque for a relatively low hp figure.  But still, HP sticks as the measure of how much work can be done.  Look at big rig trucks and heavy machinery, tractors, etc.  Their engine sizes are all measured in HP, not torque, because when you're looking at heavy equipment, you want to know how much work can be output by the powerplant. 

[BWII]

Their numbers are almost too close to call - I think on the highway, the 2.7 will still out pull the 5.0. I test drove a 5.0, in 2013 mind you, the new one has better numbers, and I was not impressed.  The 3.5 just pulls.  The 5.0 was a dog with a trailer on it.  And the new one (3.5 - well, I guess all of them) has even more torque - I'd love to have one.  Maybe a Ltd so I could have the Raptor engine.

2.7


5.0


3.5

[dkaz]

Is that Ford's 2.7 or GM's 2.7? Still, damn 425+ ft-lb of torque on a 2.7. My 4.7 V8 only has 315.

[Great_Big_Abyss]

Is that Ford's 2.7 or GM's 2.7? Still, damn 425+ ft-lb of torque on a 2.7. My 4.7 V8 only has 315.

That's with a tune...

[BWII]

Yeah, stock is only like 400. 

[dkaz]

Is that Ford's 2.7 or GM's 2.7? Still, damn 425+ ft-lb of torque on a 2.7. My 4.7 V8 only has 315.

That's with a tune...

On 93 octane. I'd go for it. 370 some odd ft-lb at 87 is still very good.

[EV-Light]

Is that Ford's 2.7 or GM's 2.7? Still, damn 425+ ft-lb of torque on a 2.7. My 4.7 V8 only has 315.

Ford....the GM one is a weak unit for a truck.


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[Seafoam]

Is that Ford's 2.7 or GM's 2.7? Still, damn 425+ ft-lb of torque on a 2.7. My 4.7 V8 only has 315.

Ford....the GM one is a weak unit for a truck.


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The GM one is their base engine. The base V6 in the ford must be weak to then.

[EV-Light]

Is that Ford's 2.7 or GM's 2.7? Still, damn 425+ ft-lb of torque on a 2.7. My 4.7 V8 only has 315.

Ford....the GM one is a weak unit for a truck.


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The GM one is their base engine. The base V6 in the ford must be weak to then.

No it isn’t...the 4.3 is the base engine.


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[Seafoam]

Is that Ford's 2.7 or GM's 2.7? Still, damn 425+ ft-lb of torque on a 2.7. My 4.7 V8 only has 315.

Ford....the GM one is a weak unit for a truck.


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The GM one is their base engine. The base V6 in the ford must be weak to then.

No it isn’t...the 4.3 is the base engine.


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They should change the writeup on this truck then because it mentions that the 2.7 replaces the old 4.3.
It also says that the 2.7 isn't that much slower than a similarly equipped 6.2. 

Also if you are  saying the 2.7 is weak then Ford's 3.3 V6 and GM's 4.3 must be really bad. I think Vmango has the 3.3 in his truck.