Will GM’s New 2.7-Liter Turbo Gas Engine Pull Stronger Than Its 2.8-Liter Duramax Diesel?

hizzo3 · May 29, 2018

People want Diesel for low and flat torque curve, but this turbo gas engine makes it look like a moot point. Put that thing in a new Equinox Sport.

Correctly sizing the turbos, variable vanes, and variable valve timing have made turbo lag pretty much disappear. There is still some F1 tech waiting to make its way down - attach an electric motor to the turbo, controlled by the ECU. Kinda makes me wish I could get one.

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WilliamBos · June 2, 2018

On 2018-05-22 at 1:02 PM, newdude said:

The big difference is the HP. That 2.7 Turbo gas makes near double the HP of the 2.8 Duramax. The 2.8 is a sweetheart of a powerplant, but as you break 3000rpm, she starts to steam off due to the torque loss. The 2.7 Turbo peaks its HP near double the RPM, and has near twice the HP. To me that alone shows its faster, and would probably be faster at yanking a similarly weighted trailer around. The 2.8 Duramax though would probably eat it in mileage with and possibly without a trailer. I've never ran less than 24mpg per fill up, and that includes winter time idling. I'm on 28.5mpg on my current tank, 150 miles into the tank.

To me, the Silverado's secret weapon might be that 3.0 Inline Duramax, providing they give it some strong tow rating numbers. The 2.7 is a potent and technologically sophisticated base engine, that packs quite a punch, but will it pack that with potential customers?

I think the new 2.7 will be a success like Ford’s Ecoboosts, particularly the 2.7 EB.

Can’t wait to see the 3.0 Dmax numbers.

Imcrazy · June 3, 2018

I do not understand the interest in this tiny motor. Wish they’d bring the good ole 350 back, make the 327 the base motor and ditch all these tiny motors. Full-size trucks just don’t make sense with out a V8. Strange times we live in these days. There ain’t no replacement for displacement.

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Daly · June 3, 2018

All these, one, tiny motors?!?! That also eclipse the small block chevy in power and economy. While I will have a V8 every time I buy a full-size, I'm good with the 4 banger. What ever they GM needs to do to meet the EPA's stupid requirements for a full-size.

Imcrazy · June 3, 2018

All these, one, tiny motors?!?! That also eclipse the small block chevy in power and economy. While I will have a V8 every time I buy a full-size, I'm good with the 4 banger. What ever they GM needs to do to meet the EPA's stupid requirements for a full-size.

I was lumping ford in there with there ego boost 2.7 and 3.5.

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WilliamBos · June 3, 2018

15 hours ago, Imcrazy said:

I was lumping ford in there with there ego boost 2.7 and 3.5.

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The 2.7 EB will humiliate and small block and any LT. The 3.5 EB crushes the LT 6.2. The new GM GTDI 2.7 will sell like crazy, and should have an excellent tow rating. It will also outshine any V8, especially when it comes to passing a gas station.

Daly · June 3, 2018

14 minutes ago, WilliamBos said:

The 2.7 EB will humiliate and small block and any LT. The 3.5 EB crushes the LT 6.2. The new GM GTDI 2.7 will sell like crazy, and should have an excellent tow rating. It will also outshine any V8, especially when it comes to passing a gas station.

LOL to all, except what's highlighted... The 3.5 competes with the 6.2, hardly "crushes it". And I'm willing to bet the 2.7 4Cyl GM is going to suffer the same major drawback as the Ford Ecoboosts, great fuel economy, until you put something behind it and ask it to do work. Then the fuel economy tanks and it'll hit the gas station faster than a 8.1 Vortec.

WilliamBos · June 3, 2018

10 minutes ago, Daly said:

LOL to all, except what's highlighted... The 3.5 competes with the 6.2, hardly "crushes it". And I'm willing to bet the 2.7 4Cyl GM is going to suffer the same major drawback as the Ford Ecoboosts, great fuel economy, until you put something behind it and ask it to do work. Then the fuel economy tanks and it'll hit the gas station faster than a 8.1 Vortec.

The V8 engines also suffer from horrible mpg when towing the max, so no difference.

The difference is the GTDI 2.7 will get superior empty mpg. Thats what most light duty trucks do - drive around empty.

66% of all F150 sales are Ecoboosts - says a lot for their engine program.

The GTDI engines are here to stsy. I wish GM all the best, hopefully they have an I-6 GTDI to go along side with the I-4 in the 1500.

Edited June 3, 2018 by WilliamBos

WilliamBos · June 3, 2018

6 minutes ago, Daly said:

LOL to all, except what's highlighted... The 3.5 competes with the 6.2, hardly "crushes it". And I'm willing to bet the 2.7 4Cyl GM is going to suffer the same major drawback as the Ford Ecoboosts, great fuel economy, until you put something behind it and ask it to do work. Then the fuel economy tanks and it'll hit the gas station faster than a 8.1 Vortec.

The V8 engines also suffer from horrible mpg when towing the max, so no difference.

The difference is the GTDI 2.7 will get superior empty mpg. Thats what most light duty trucks do - drive around empty.

gearheadesw · June 3, 2018

So, we still know next to nothing on the new 3.0 Dmax straight 6? Is this the engine that is supposed to go into the 2500? What transmissions will be offered, all like 8 and 10 speed automatics? No manual trucks in some of the upper trim levels, maybe? With fuel prices starting to go up, some better economy would be nice to maybe look forward to...

Daly · June 3, 2018

1 hour ago, WilliamBos said:

The V8 engines also suffer from horrible mpg when towing the max, so no difference.

The difference is the GTDI 2.7 will get superior empty mpg. Thats what most light duty trucks do - drive around empty.

My 5.3 High Country gets 21-22MPG, empty, during day to day driving. Towing my Duster it gets 16-18MPG, that's not much of a hit, considering thats close to 6500lbs behind the truck. Compare that to my buddy that has a 2016 3.5EB F150 Sport Super Crew that gets similar empty MPG, he's says he gets anywhere from 20-24mpg day to day driving, but when towing his lighter Fox body to the same track at the same speed (we go together), he has only ever been able to manage 11-13MPG tops. Our other body with a 2011 Ram Sport does even better in a way. He gets about 15-17MPG towing his Valiant, and has told use he gets 19-20MPG day to day. Less MPG, but also less of a drop. The EB and all turbo engines suffer from the same problem, when the turbo spools up and forces more air in, it needs more fuel to maintain a good air/fuel ratio. The more you use the turbo, the more fuel you use. Ford can spout off all the MPG claims they want, but real life use is showing other wise.

And Ford sells 66% EB, because they push the EB more. If you read/watch the reviews, the hidden gem is almost always the 5.0 V8.

Edited June 3, 2018 by Daly

Daly · June 3, 2018

The 3.0 Diesel will likely be 200-220hp and 350-400ftlbs. It's going to be inline with the Ford and Dodge 3.0 diesels and if GM continues their trend, it'll likely be lower than the competitors numbers.

Abarth500. · June 4, 2018

Looking at the tech integrated into this motor, I'm actually quite impressed. I don't think there will be any major durability issues- a well-designed turbo 4 can be very strong.

Imcrazy · June 4, 2018

Cite all the data you want, there is no replacement for displacement... Turbo charged v6's in trucks don't seem like a good recipe for long term durability...

Imcrazy · June 4, 2018

5 hours ago, Daly said:

My 5.3 High Country gets 21-22MPG, empty, during day to day driving. Towing my Duster it gets 16-18MPG, that's not much of a hit, considering thats close to 6500lbs behind the truck. Compare that to my buddy that has a 2016 3.5EB F150 Sport Super Crew that gets similar empty MPG, he's says he gets anywhere from 20-24mpg day to day driving, but when towing his lighter Fox body to the same track at the same speed (we go together), he has only ever been able to manage 11-13MPG tops. Our other body with a 2011 Ram Sport does even better in a way. He gets about 15-17MPG towing his Valiant, and has told use he gets 19-20MPG day to day. Less MPG, but also less of a drop. The EB and all turbo engines suffer from the same problem, when the turbo spools up and forces more air in, it needs more fuel to maintain a good air/fuel ratio. The more you use the turbo, the more fuel you use. Ford can spout off all the MPG claims they want, but real life use is showing other wise.

And Ford sells 66% EB, because they push the EB more. If you read/watch the reviews, the hidden gem is almost always the 5.0 V8.

The 5.0 is where it's at...