details released on new chevy/GM truck engines
04-05-2013, 05:55 PM
#71
Right now only in the Denali and top of the line Silverado I believe. 14+ It will be available in everything but the regular cabs. Gm sat on the 5.3 for a while and only upgraded the car LS engines so the 5.3 was a little overdue, but this new one looks to be a gem. Remember 99 when the 5.3 came out, it decimated other trucks engines. It wasn't until 2011 that Ford surpassed GM in truck engines.
The new 6.2 will probably be rated at 425/455 minimum, but to be honest the current one outperforms the Ford 6.2. Power under the curve has always been GM's thing with their v8's and the new ones blow away their old LS v8's. EcoBoost is Fords saving grace and looks like an awesome option. I doubt GM will get Ecoboost EPA numbers out of their 6.2 until they use an 8 speed auto, but if they can come in 1mpg combined under it that will be a landmark.
Current Silverado's are not that attractive, Sierras are significantly better. The new Silverado's are nice, but the new Sierra really steps it up.
The new 6.2 will probably be rated at 425/455 minimum, but to be honest the current one outperforms the Ford 6.2. Power under the curve has always been GM's thing with their v8's and the new ones blow away their old LS v8's. EcoBoost is Fords saving grace and looks like an awesome option. I doubt GM will get Ecoboost EPA numbers out of their 6.2 until they use an 8 speed auto, but if they can come in 1mpg combined under it that will be a landmark.
Current Silverado's are not that attractive, Sierras are significantly better. The new Silverado's are nice, but the new Sierra really steps it up.
I don't believe the Torque curve pic that you posted at all.
The GM 6.2L already is inferior to the Ford 6.2L so I have no idea why you think different. Ford used the same flywheel dyno to test it against their 6.2L and here's the comparison right out of Ford's hard cover dealer stand book.
GM chose to be a follower and not a leader, by stepping up to the plate and offering everything Ford did 3 years prior.
They should had gone under but Obama wanted a motor company, so he bought them with OUR money.
One thing is for sure, even if the torque curve is as good as they claim, it won't matter with GM's typical crappy axle ratios of 3.08 and 3.42. The 3.08 gear has a 21% loss of torque multiplication compared to the Ford 3.73 axle gear. The 3.42 axle gear has a loss of 9% torque multiplication compared to Ford's 3.73 axle gearing. Chevy will need a lot more torque than their claim, to equal wheel torque with such lousy axle gear ratios.
At 350 lbs, a 21% loss would be 73 lbs and a 9% loss would be 31 lbs. GMs 6 speed transmission gears are pretty close to Fords, even though Ford still has better gearing ratios.
Last edited by Mike Up; 04-05-2013 at 06:21 PM.
04-05-2013, 09:07 PM
#72
Senior Member
Right now only in the Denali and top of the line Silverado I believe. 14+ It will be available in everything but the regular cabs. Gm sat on the 5.3 for a while and only upgraded the car LS engines so the 5.3 was a little overdue, but this new one looks to be a gem. Remember 99 when the 5.3 came out, it decimated other trucks engines. It wasn't until 2011 that Ford surpassed GM in truck engines.
The new 6.2 will probably be rated at 425/455 minimum, but to be honest the current one outperforms the Ford 6.2. Power under the curve has always been GM's thing with their v8's and the new ones blow away their old LS v8's. EcoBoost is Fords saving grace and looks like an awesome option. I doubt GM will get Ecoboost EPA numbers out of their 6.2 until they use an 8 speed auto, but if they can come in 1mpg combined under it that will be a landmark.
Current Silverado's are not that attractive, Sierras are significantly better. The new Silverado's are nice, but the new Sierra really steps it up.
04-06-2013, 08:55 AM
#73
Senior Member
I get the bias, but let's at least look at facts
It flat out dominates the 5.0 in low end torque. The 5.0 doesn't wake up until around 3500. It does this while getting better gas mileage. The Ecoboost makes more power, but this is the mid line engine. The new 6.2 will make more power and torque then the Ecoboost while probably not getting as good of gas mileage.
You can be a die hard Ford fan, but you have to admit this is looking to be a sweet motor all around. Tons of low end torque and good gas mileage in a simple v8 platform.
It flat out dominates the 5.0 in low end torque. The 5.0 doesn't wake up until around 3500. It does this while getting better gas mileage. The Ecoboost makes more power, but this is the mid line engine. The new 6.2 will make more power and torque then the Ecoboost while probably not getting as good of gas mileage.
You can be a die hard Ford fan, but you have to admit this is looking to be a sweet motor all around. Tons of low end torque and good gas mileage in a simple v8 platform.
04-06-2013, 10:00 AM
#74
For the last 5+ years, everything that GM has released has been SAE certified, therefore rated actual output verified by third party. Chassis dyno comparisons reveal these numbers to be spot on based on generally accepted powertrain losses. Ford on the other hand does not certify most of their engines, And chassis dyno comparisons suggest that their engines are actually underrated.