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Discussion in 'Trucks and Trailers' started by joed, Feb 2, 2011.
E c o b o o s t
Reworked for peak power at say 6500 rpm, I wonder if the EcoBoost would be around 500-550hp.
Ford has a 'Boss 302' version of the 5L planned. Some detail work raising it to just under 450hp. However a high performance auto engine needs its power in the 30-40% range where it has the most power under the curve. Typically that is 5-10% beyond the power peak on the high end. So, if our 6500rpm had a redline at 7000, the power band on a typical shift would drop it to 4000-4400, the bottom end of the range.
For our trucks we probably prefer a relatively flat torque curve. My hypothesis is that that passenger cars prefer a low peaked, declining torque curve, similar to a diesel, that has little torque change at the rear wheels between shifts and no power advantage from being rev'd.
I bought the STX 5.0 in a Regular cab 6.5ft bed last night. We went to dinner and home last night, city driving getting into it once getting on and then immediately off the freeway. OBC says 18.5 mpg .
BMW just announced a state-of-the-art engine. It is a 2L turbocharged 4-cylinder. It has a nearly flat 260-265 ft-lb of torque for 1300 rpm until its 245hp power peak at 5000rpm. It has a variable valve timing, variable valve lift, direct injection, a computer controlled oil pump, electric water pump, and start/stop function that turns off the engine at idle.
It is an indicator of what the next generation of engines past the EcoBoost could be.
Good young' BMW!
The Ecoboost is outpulling the Hemi and the Vortec by what 11 seconds with 9K on the trailer? And getting great milage, 20+mpg. I drove one and the thing is lighting fast! I love this engine!! I wish I would have waited another year, but I still like my 5.4, Good solid engine and has plenty of power for me, with my upgrades of course
Ford already has the I 4 Ecoboost? How is this past the Ecoboost?
Following up on the new BMW engine, GM had a few direct injection DOHC engines, but that seems to have whithered to one, a 2.4L 4-cylinder, on some Buick models. For 2012 it will offer 'e-assist' which is a 15hp motor (like a big starter motor) and a small lithium-ion battery (a total waste, lead acid would have worked fine), on some Buick models. Only capable of 25mpg city, 37mpg highway (not much different than a similarly sized Hyundai Sonata), it does turn off the engine at idle.
What is funny is how GM talks about regenerative breaking. 15hp? Are they kidding? 15hp for stopping is like using a small pruning scissors to cut a two acre lawn (brakes can generate around 1200hp).
The EPA city test is bogus though; it has only two short idle periods more than a couple of seconds. Must rush hour commutes have at least a few choke points which much more consecutive idle time. In reality, turning off the engine at idle should produce much bigger real world improvements than the EPA city numbers indicate.
Not so sure if I would call it sexy, in fact my wife doesn't like the Race Red I got. I do though, and I could not find a white, silver or gray 5.0 shortbed/limited slip within 600 miles of here. I am loving this truck, the motor pulls way harder than my 04 5.4. Ford has got it together on this truck , I like everything about it. I hooked up the trailer and mowers (2500lbs) and towing with the 3.55 will be fine with this weight.