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GM bests Ford's EcoBoost V6 fuel efficiency without complex, expensive turbochargers

Ford has spent a great deal of time and money developing and marketing its EcoBoost family. The company makes a wide variety of EcoBoost engines (which is basically a fancy name for turbocharging plus direct injection) ranging from a 1.0-liter three-cylinder to a 3.5-liter V6.
 
Ford's efforts have paid off, as sales of the naturally aspirated V6- and EcoBoost V6-equipped F-150s have outpaced those of the V8 models. And all along the way, Ford has thumbed its nose at the Chevrolet Silverado/GMC Sierra, stating how its EcoBoost V6 gets V8 performance and V6 fuel economy.
 
GM, however, is hitting back today with the announcement that its new 5.3-liter EcoTec3 V8 engines manages to produce 355 horsepower and 383 lb-ft of torque. While the horsepower number compares favorably with the EcoBoost V6 in the F-150, it's down quite a bit in torque. GM says that in 4x2 trim, the EcoTec3 will be good for 23 mpg highway; checking off the 4x4 option box will result in 22 mpg on the highway.


2014 Chevrolet Silverado
 
Both of these numbers are 1 mpg better than the EcoBoost F-150. In fact, it matches the fuel economy of Ford’s naturally aspirated, 3.7-liter V6.
 
“Silverado’s available 5.3-liter EcoTec3 V8 gives customers the best of both worlds,” bragged Jeff Luke, executive chief engineer for the Silverado. “Customers get the proven power and dependability of a V-8 truck engine, with better fuel economy than a leading competitor’s smaller turbocharged V-6.”


5.3-liter EcoTec3 V8 engine
 
GM's decision to go the "tried and true" route may pay off in the end. Recent reports have suggested that while many manufacturers seem to ace the EPA's tests with turbocharged gasoline engines, most consumers aren't able to match the sticker numbers in the real world.

The Ford Atlas Concept previews the nexxt generation F-150
 
GM’s fun in the mpg sun, however, likely won’t last long. Ford is reportedly looking to trim up to 700 pounds from the next generation F-150, which will go a long way towards improving fuel efficiency. Ford showcased the use of active aero technology on its Atlas truck concept (which no doubt is a precursor to the next generation F-150), which boost highway fuel efficiency by 2 mpg.

Sources: General Motors [1], [2]



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RE: GM.... bleh.
By Bad-Karma on 4/2/2013 4:10:13 PM , Rating: 2
quote:
A typical diesel exhaust temps


My T444Es were originally the more well know 7.3PSD that came with the trucks. That is until I removed every piece of Ford equipment and reverted them over to the IH spec and tune. When I finished up I took her to a heavy wheel dyno in Tucson and now she'll turn just over 800Hp and 1080Ft/LBS of Torque with the flip chip all the way up.

quote:
When you say 26+lbs are you talking about inches of manifold pressure?


My pillar pre & post boost gauges are in PSI and max out at 60PSI. So you're right about manifold pressure. However, Ford original equipment used a "MAP" sensor that measured in LBS. That original sensor would alert the CCU which would automatically defuel the engine if the boost pressure reached 25LBS.

I have a by-pass element on there now that fools the CCU and lets higher levels pass. The gauge under my dash reads from that by-pass sensor and reads the actual pressure in lbs.

Oh and Spuke......Those powder forged rods(PFR) that Ford uses were one of the first things to go. Went with machined titanium. Too many of my friends cracked/broke/bent those PFR when they went over about 450+HP.


RE: GM.... bleh.
By Spuke on 4/2/2013 4:26:37 PM , Rating: 2
quote:
Oh and Spuke......Those powder forged rods(PFR) that Ford uses were one of the first things to go. Went with machined titanium. Too many of my friends cracked/broke/bent those PFR when they went over about 450+HP.
Nice mods! Is that 800 at the wheels?


RE: GM.... bleh.
By Bad-Karma on 4/2/2013 4:45:55 PM , Rating: 2
Yes, that at the wheels. But I don't dare do that kind of power output for very long. Other things will start to fail...

Had to have a custom R4100 built by BTS down in Lead Hill AR to handle everything. According to the spec the new Trans will handle up to 2K HP.

But we have a 1/3-up-1/3-down gear splitter and a diff locker from US gear installed just to help protect that tranny from any damage.

Spuke, When I'm going through the Rockies with my cattle or horses you should see the look on the face of the trucker and camper crowd when I pass them at full speed on a incline. It's priceless! Of course downhill I still have brake over heating issues but the jake brake helps even things out.


RE: GM.... bleh.
By Spuke on 4/2/2013 6:19:37 PM , Rating: 2
VERY nice rig Karma. I can only imagine those looks LOL!!! I've thought about selling my truck in a few years but modding it would be soooo much fun although since CA started smogging diesels, I'm thinking twice about that. Maybe when I move to AZ.


"So if you want to save the planet, feel free to drive your Hummer. Just avoid the drive thru line at McDonalds." -- Michael Asher














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