GM, and others want more diesels....

[TxDieselKid]

This is a news story I found intresting.....

GM, Others Pushing for Wider Diesel Use



The diesel engine, used widely in big trucks but less commonly in passenger cars, may enjoy a revival if General Motors and some other automakers have their way. If they are successful, the biggest gains could be for pickup trucks and sport utility vehicles, which are often used in local commercial delivery service.



The reason, according to an article in the Detroit News, is rising gasoline prices and the increasing pressure to improve fuel economy. However, GM says current Environmental Protection Agency regulations make it very difficult to use diesel technology. Diesel burns 30% more efficiently than gasoline, but gives off more soot and smog-producing emissions. (May 24, Transport Topics)

The scorce can be found HERE



Andrew

 

[A Johnson]

Interesting, I didn't read the link but I don't know why they couldn't be as clean with the proper aftertreament. I realize regenerative soot traps would add significant costs, $5-6K per engine but I think it could be done. Not that anyone hear has ever removed a catalyst or anything like that.



I am hemming and hawing about getting a new rig,saw the 03 and wow!! I like it! However $35000 or so isn't possible.



Next question is if a big rig 350- 600 HP can get 5-7 MPG pulling 98000 pounds why can't we buy an 8000lb pickup that gets 30mpg. I realize there are some physics and such that come into play but 10- 20 mpg seems too low.



A Johnson

 

[drees1]

Just remember, their 80,000 lbs pulled with 400Hp would be like us using 100Hp to pull 20,000 lbs. Not exactly right, but if we had 13 speed trannys, 100 useable Hp would be effective, and we could get 30mpg. We also need better aerodynamics. The wind drag Hp per lb pulled is less on the semi. Also, their rolling resistance per pound pulled is less, as they use large diameter 110 psi tires. My old 5 speed jetta diesel gets 50+ mpg every time, but 48 Hp helps for slow take off, and since I don't redline it (5000rpm) I probably only use 25 - 30 Hp at 2800 - 3000 rpm shift points.



I think 30 Mpg empty is possible in our trucks if we modified them correctly.



Doug Rees

 

[LarryB]

Originally posted by drees1

but 48 Hp helps for slow take off, and since I don't redline it (5000rpm) I probably only use 25 - 30 Hp at 2800 - 3000 rpm shift points.

Doug

You must be running a 1. 5L to get 48hp. The 1. 6L makes a whopping 52hp! WOW!