Duramax 4.5L V8

[Toadz400]

Has anyone else heard about the new Duramax coming out for '09? I remember hearing awhile back that the big three were going to be making smaller diesels for the half-ton trucks. Yesterday I happened to see the 4.5L Duramax on the cover of a Diesel truck magazine. Here's a link I found on some info:

http://www.autoblog.com/2007/06/15/gm-announces-clean-diesel-v8-for-pickups-and-the-hummer-h2/

I'm definitely excited for this and I will no doubt be looking into one when they come out or the second year around just so they can work the bugs out. I could see getting 25+ mpg out of these trucks and they mention them being used in other smaller vehicles. I could see a lot of V8 S10 enthusiasts (myself included) chasing after this engine.

"The new oil burner is expected to produce at least 310 horsepower and 520 ft-lbs. of torque."
I also read that these were early estimates for the engine and they predict it will be closer to at least 590 ft-lbs. of torque.

[gbcap]

I would highly doubt 25 mpg out of it. i get 15-19 out of my 5.9l cummins. only if you chipped it and opened the intake and exhaust up a bit.

i was having this discussion the other day when i saw it in a mag i got. it will be a GREAT option for the weekend warrior to have a better riding truck during the week that can do double duty on the weekend pulling thier trailers. a lil helper spring and these trucks could well be on the way to replacing alot of 2500/3500 buyers.

[Toadz400]

I don't see how you wouldn't be able to get at least 25 mpg out of this engine in a 1500 truck. I know of several people who are able to get around 20 mpg with the 6.6L Duramax in a 3/4 ton truck. The engine is also going to be lighter and in a lighter truck so I don't see how that wouldn't improve the mileage.

Either way I'm definitely looking forward to this engine.

[pro-rider46]

i dont know how many miles to the gallon get but it gets 575 miles to the tank in his f250. and it has a 35 gallon tank

[oldskoolex400]

Originally posted by pro-rider46
i dont know how many miles to the gallon get but it gets 575 miles to the tank in his f250. and it has a 35 gallon tank

575 divided by 35..... ;)

[gbcap]

i haven't heard anyone getting 20 unless they are on FLAT ground and or they have modified the truck ie. a chip, intake and exhaust. then it is very plausible. just cause it is a 1500 truck doesn't mean its going to be THAT much lighter. MAYBE 1000lbs or so. that isn't going to make 5mpg difference.

i am JUST speculating. but i wouldn't tihnk it would be 25+ easy in the high teens and low 20's unloaded on flat ground.

i JUST got 22mpg on my last trip completely unloaded with a chip and intake on my 5.9l cummings.

[Quad18star]

I was reading an article over a month ago from Chrysler in the news paper , and by 2009 they'll have their Ram 1500s getting close to 35mpg.

[400exstud]

Originally posted by Quad18star
I was reading an article over a month ago from Chrysler in the news paper , and by 2009 they'll have their Ram 1500s getting close to 35mpg.

I doubt that. First they need to get in the 20's. My uncles "05 5.7 Hemi only gets like 18 mpg and he drives like a grandpa (he is 65).

About the diesel in a 1/2 ton. How much do you guys think that this will tack on to the price of the truck. Don't shoot the messenger, but I have heard from reading at f150online that it could be over $6000 more. Add that to a low to mid $30,000 truck and you are almost to a nice 250. Just my thoughts.

[cjmcguire90]

Originally posted by 400exstud
I doubt that. First they need to get in the 20's. My uncles "05 5.7 Hemi only gets like 18 mpg and he drives like a grandpa (he is 65).

About the diesel in a 1/2 ton. How much do you guys think that this will tack on to the price of the truck. Don't shoot the messenger, but I have heard from reading at f150online that it could be over $6000 more. Add that to a low to mid $30,000 truck and you are almost to a nice 250. Just my thoughts.


I agree with you on the pricing, half tons are expensive as it is and i wonder how much they will try to charge for a diesel in it? Personally when im older ill just get a 2500 with a diesel because im pretty sure the trucks with 6 speeds can do 20+ mpg from what ive read.

[joshyz125]

you can easily get 25 MPG out of a diesel,
they have diesels in little cars going 30 and 40+ miles per gallon,
they don't have more power then they need, which is taken out many ways to help with Fuel effiency

i have a 7.3 in a F350
i get 16-17 mpg, with 3.73 gears

a diesel has enough power down low that you could put some pretty good size high way gears, since a 1/2 ton wouldn't be rated to pull what a 1 ton would, you wouldn't have to worry about all that pulling power, just being more fuel efficent,
4.5 is pretty small, with taller gears, i think it could easily be done

we're talking mpg, not what it would be able to tow

[Quad18star]

Dodge's plans .....

http://www.pickuptruck.com/html/future/dodge/09ram0120070203.html
http://www.allpar.com/model/ram/2009-ram.html
http://www.leftlanenews.com/dodge-ram-prototype.html

[Toadz400]

Originally posted by joshyz125
you can easily get 25 MPG out of a diesel,
they have diesels in little cars going 30 and 40+ miles per gallon,
they don't have more power then they need, which is taken out many ways to help with Fuel effiency

i have a 7.3 in a F350
i get 16-17 mpg, with 3.73 gears

a diesel has enough power down low that you could put some pretty good size high way gears, since a 1/2 ton wouldn't be rated to pull what a 1 ton would, you wouldn't have to worry about all that pulling power, just being more fuel efficent,
4.5 is pretty small, with taller gears, i think it could easily be done

we're talking mpg, not what it would be able to tow

Exactly. I believe the diesel Jetta's get up to 50 mpg or more. I don't see why they wouldn't be able to get 25+ mpg unloaded and even 20 mpg pulling something. We're entering into the age of efficiency matched with unprecedented power.

[Kickstarts-suck]

my dad gets 21 in his 07 F150 4x2 5.4l

gas millage depends on how you drive mostly. I could see 25 mpg out of it

[Mxjunkie]

Originally posted by Toadz400
. I could see a lot of V8 S10 enthusiasts (myself included) chasing after this engine.


I see they say it's the same size as a small block so it could work, The entire drivetrain would have to be changed around to deal with the torque, most likely you'd end up putting a Currie 9 inch rear on it which is almost 2500 not to mention a drive shaft and some sort of transmisison. But I can see where your coming from gas mileage wise, I get 9-10 a gallon and I have to run 93. It'd be kinda cool having stacks on a s10 that blew black smoke instead.. :tired: :p

[quad2xtreme]

Originally posted by Toadz400
Exactly. I believe the diesel Jetta's get up to 50 mpg or more. I don't see why they wouldn't be able to get 25+ mpg unloaded and even 20 mpg pulling something. We're entering into the age of efficiency matched with unprecedented power.

I agree. My dad had a diesel Rabbit in 1979 and another in 1982 that he got 48 mpg driving in the hilly areas of PA. When he moved to Florida, he started getting 53 mpg. Today, my wife has a diesel Beetle that gets 39-42 mpg. The big difference...his was a snail and her turbo diesel has get up and go (more than it needs). If they changed her gearing around to run like his did back in the early 80's, she could probably be getting 75-80 mpg. His Rabbit was lucky to hit 80 miles per hour in a downhill wind, I ran hers to 105 mph and stopped trying...not sure how fast it would really go.

/Jon

[Toadz400]

Originally posted by Mxjunkie
I see they say it's the same size as a small block so it could work, The entire drivetrain would have to be changed around to deal with the torque, most likely you'd end up putting a Currie 9 inch rear on it which is almost 2500 not to mention a drive shaft and some sort of transmisison. But I can see where your coming from gas mileage wise, I get 9-10 a gallon and I have to run 93. It'd be kinda cool having stacks on a s10 that blew black smoke instead.. :tired: :p

If they left the engine in stock form there are plenty of rear ends and drive shafts that would be able to handle the torque. It's just that once you started modding that engine you'd have to look into some serious upgrades.

[Ghost-Rider]

Anyone else hear about the G8 ?

[Toadz400]

Originally posted by Ghost-Rider
Anyone else hear about the G8 ?

I just did a search for it and it looks like it's going to be a pretty sweet sedan. Amazingly it looks pretty nice for a Pontiac and it seems they did their homework on this one.

[CannondaleRider]

Originally posted by quad2xtreme
I ran hers to 105 mph and stopped trying...not sure how fast it would really go.


I can personally attest, the TDI Beetles will go at least 126 :chinese:

Quit trying after that point also.


As for mileage.....a 4.5 Duramax with the right gearing, can easily reach 25. I'd guess about 30 would be your highway average.

My '07 Dodge Mega Cab 3500, with the 5.9 backed by a G36(6-Speed), completely stock.....gets 18 average on the highway, at 85mph. If I were to back it down to about 70, and keep my foot out of it getting there, it would probably average 20. Let alone if I were to put a chip of some sort on it, that'll bump up the MPG to about 21 highway average(From what I've researched)........Yeah, a little 4.5 diesel will get 25 EASY.

The only reason I can see the mileage not being possible would be due to the diesel emissions crap.....that would limit it.

[Toadz400]

Technology is allowing for performance and mileage to be kept despite emissions. That being said I'm still not doubting it being able to get decent mileage.

[CannondaleRider]

The reason I doubted based only on emissions....is the fact that the 6.7 Cummins, the 6.4 Powerstroks, and the new LMM 6.6 Duramax all seem to be getting much worse mileage due to the emissions limits(Which, did I mention, makes me angry)....when compared to the 5.9, the 6.0(or the 7.3), and the LBZ 6.6.

Such substantial drops in mileage, that I could doubt a 4.5 with equal emissions limits, and equal systems, getting 25. Without it, I wouldn't have a doubt in my mind that it would get GREAT mileage....but this emissions crap is really screwing up diesel mileage.

If they are going to keep putting limits on diesel emissions(of course they will), then they need to find a better system to fixing the emissions "problem"...in my opinion.

[Ghost-Rider]

Originally posted by Toadz400
I just did a search for it and it looks like it's going to be a pretty sweet sedan. Amazingly it looks pretty nice for a Pontiac and it seems they did their homework on this one.

Friends uncle paints show cars for GM and said he actually likes this one,I'm excited to see how it is.

[Toadz400]

Originally posted by CannondaleRider
The reason I doubted based only on emissions....is the fact that the 6.7 Cummins, the 6.4 Powerstroks, and the new LMM 6.6 Duramax all seem to be getting much worse mileage due to the emissions limits(Which, did I mention, makes me angry)....when compared to the 5.9, the 6.0(or the 7.3), and the LBZ 6.6.

Such substantial drops in mileage, that I could doubt a 4.5 with equal emissions limits, and equal systems, getting 25. Without it, I wouldn't have a doubt in my mind that it would get GREAT mileage....but this emissions crap is really screwing up diesel mileage.

If they are going to keep putting limits on diesel emissions(of course they will), then they need to find a better system to fixing the emissions "problem"...in my opinion.

True. I'm sure eventually they will. Heck, I'm taking energy and engineering classes right now, maybe I'll figure something out. ;)

[Raptor68]

Some pics of my Dad's new '07 Silverado 2500 HD with the 6.6L Duramax.

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[Toadz400]

I don't know about anybody else, but I believe the '07 GM vehicles are the ugliest things ever produced. I think the 80's had better looking cars and much better looking trucks than the '07 models. Other than that, I'm sure that's an awesome truck.

[Xater]

diesel trucks rule, im hoping to find a 98 dogde 5.9 12v. I would stay away from all of the new diesels, idk about all of the engines that are built around getting good emissions. ne way cummins has to be the easiest to mod/fix.

[oldskoolex400]

Originally posted by Xater
diesel trucks rule, im hoping to find a 98 dogde 5.9 12v. I would stay away from all of the new diesels, idk about all of the engines that are built around getting good emissions. ne way cummins has to be the easiest to mod/fix.

i would get the 24 v.

[Xater]

Originally posted by oldskoolex400
i would get the 24 v.
I would much rather have a 12 v, there cheeper to mod. but if I bought a new truck it would be the 24v not the 6.7

[CannondaleRider]

A 12v is SO much simpler then a 24v(duh, lol). And, there is so much more available power, when modded, from a 12v...when compared to a 24.

The 9 second Cummins trucks you see, are all running 12v's. ;)

As for new trucks, I'd definatly wait for the 6.7 to be proven first, the 5.9 is such a proven setup, you'd have no reason to not go with the 5.9. We were pretty lucky to get one of the last 07 Mega's with the 5.9