whats really cool is this has about the same amount of power as the first year of the 6.6 d-max

 

I keep hearing the MPG argument, but I get 14 in my gas rcsb and I got 12 in my old Powerstroke around town... I loved the power and towing ability, but the mileage was never better than 15 with mixed driving.

 

i don't see why it wouldn't, our 2500HD rclb dmax gets 23mpg

 

But 4.5L will weigh about he same as a gas V8 and be way more efficient. Plus its not a 3/4 ton and you don't have all the weight to pull around.

I doubt you will get in in anything less than a crew or ext cab. Not to mention it will be a $5000 option. So it would pay for itself in the better mileage. But swapping it into a regular cab truck and stripping it down to nothing and you could see 30mpg and 10's in the 1/4mile! Lol...

 

I actually know the specs on that motor - work on alot of stuff for that. It WILL be a great engine - we built/designed/tested the turbo systems and emissions systems, and probably the tranny to (but not my divison).

 

Please leak some information!!!! Pictures whatever!!!!


What turbo does it have?


Anything please!

 

You need a tune. I'm getting better than that in my ECSB even after my cam install. I haven't even retuned for the cam yet.
The 4.5 will probably come factory with 22mpg epa considering the weight of the truck. Alot of dmax guys area already getting 25+ with the 2500hd on a tune. Tune the 4.5 and it's a whole new ballgame.

 

I have a tune actually, I just have a shitty commute, 6 miles and it takes me 15-20 minutes. Hell, my Lexus IS300 only gets 17 mpg (rated at 22 mixed). I did a tank in my RCSB of only highway and got 20, so it's not the vehicles, it's the commute.

As for my original argument, I'm not saying the new diesels won't have better usable torque and some other benefits, I'm just saying efficiency shouldn't be their selling point. I personally haven't seen a diesel get more than 2-3 mpg better than an equivalent gas engine (i.e. crew cab, 4x4, etc.) and the way diesel fuel is looking in the southeast, it's just not for me.

 

This engine design has a head design that makes perfect sense for diesels. Exhaust ports are on the the valley sides of the heads and intakes are on the outside. Hot high-pressure turbo plumbing is minimized and the turbo can sit lower. The lower profile will allow it to fit in the shallower engine bays of half-ton trucks and reduce underhood heat. Article says narrow-angle V. I wonder if it had to get a counter-balance shaft to pull this off.

 

wonder if GM will be nice and allow it to bolt up to a T56....would make a killer combo.

Hopefully GM keeps with the easy to remove DPF for increased economy as well...our 08 dmax has jumped a ton on mpg after DPF removal.