Hummer H1 swapping engine and trans.
10-28-2004, 08:06 AM
#1
Registered User
Thread Starter
Join Date: Feb 2002
Location: Sturbridge, Taxachusetts
Posts: 1,424
Likes: 0
Received 0 Likes
on
0 Posts
Hummer H1 swapping engine and trans.
Today's AutoTech Daily reports that the '06 H1 will run the 6.6 Duramax and the Allison 5 speed auto.
"The main difference is the switch from the 6.5-liter Optimizer V-8 diesel engine which will continue to be used for the military Humvee to a 6.6-liter Duramax diesel V-8. The latter produces 300 hp and 520 lb-ft of torque, up 46% and 18%, respectively, over the Optimizer’s output. Zero-to-60 acceleration is three seconds faster at 13.5 seconds. The engine will be mated with an Allison five-speed automatic transmission, which replaces the previous Hydra-matic four-speed automatic. Used in medium- and heavyduty commercial trucks, the five-speed shifter adjusts shift patterns for optimal performance when the vehicle is towing or carrying heavy loads. It also has a 45:1 “crawl” ratio. To accommodate the new engine and transmission, the body of the H1 Alpha is positioned 2 inches higher than the previous H1, providing slightly more clearance for thebody panels from the wheels and from potential obstacles on trails.......... Based upon preliminary internal tests, GM says fuel efficiency also will be improved. Due to its size, the vehicle isn’t required to be officially tested and rated by the U.S. Environmental Protection Agency. The boost in fuel economy along with a combined 9.5 gallons of additional storage capacity in the vehicle’s two fuel tanks promises to extend maximum driving range from 400 miles to 570 miles. This works out to be nearly 11.1 mpg vs. just over 9.5 mpg for the base H1."
Gee, I wonder why they're not using the 'Max in the military version?....
"The main difference is the switch from the 6.5-liter Optimizer V-8 diesel engine which will continue to be used for the military Humvee to a 6.6-liter Duramax diesel V-8. The latter produces 300 hp and 520 lb-ft of torque, up 46% and 18%, respectively, over the Optimizer’s output. Zero-to-60 acceleration is three seconds faster at 13.5 seconds. The engine will be mated with an Allison five-speed automatic transmission, which replaces the previous Hydra-matic four-speed automatic. Used in medium- and heavyduty commercial trucks, the five-speed shifter adjusts shift patterns for optimal performance when the vehicle is towing or carrying heavy loads. It also has a 45:1 “crawl” ratio. To accommodate the new engine and transmission, the body of the H1 Alpha is positioned 2 inches higher than the previous H1, providing slightly more clearance for thebody panels from the wheels and from potential obstacles on trails.......... Based upon preliminary internal tests, GM says fuel efficiency also will be improved. Due to its size, the vehicle isn’t required to be officially tested and rated by the U.S. Environmental Protection Agency. The boost in fuel economy along with a combined 9.5 gallons of additional storage capacity in the vehicle’s two fuel tanks promises to extend maximum driving range from 400 miles to 570 miles. This works out to be nearly 11.1 mpg vs. just over 9.5 mpg for the base H1."
Gee, I wonder why they're not using the 'Max in the military version?....
10-28-2004, 06:56 PM
#7
Registered User
11.1 for something that huge is prety good. And if I had to speculat as to why the dmax is not going to the goverment units I would say its more lagistics than any thing. They already have how many millions of them running around with 6.2 and 6.5 NA GM diesels. They have parts for them and they like to keep them simmple. Less electronics to get watter in and have to wory abought in the feild. and they are cheaper.
Trending Topics
10-29-2004, 07:22 AM
#11
Registered User
Thread Starter
Join Date: Feb 2002
Location: Sturbridge, Taxachusetts
Posts: 1,424
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by DZLPWR
What engine is the military using in the Hummer these days?
What engine is the military using in the Hummer these days?
Originally posted by DieselDude
woouldn't it be interesting to know why the military isn't gonna use it humm.....
woouldn't it be interesting to know why the military isn't gonna use it humm.....
Actually, it might be because the engine is sole sourced from Japan, and nowhere else in the US.
10-29-2004, 07:45 AM
#12
Registered User
Join Date: Dec 2003
Location: Central PA
Posts: 839
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by bkrukow
11.1 for something that huge is prety good.
11.1 for something that huge is prety good.
I think the dmax is a bit too complex / fragile for something on the battlefield, personally.
10-29-2004, 03:42 PM
#13
Registered User
Join Date: Feb 2004
Location: Northern Iowa
Posts: 663
Likes: 0
Received 0 Likes
on
0 Posts
Millitary engine
Primary reason for staying with the 6.5L "optimizer" engine in milliatry vechiles is the relative lack of electronics and further training that would be required. The "light duty" fleet for the miliatary is the 6.2/6.5L V-8's and to re-train service tech's and re-stock part inventories would be a huge expense and logistical nightmare. "Need more power"--but it's not quite that simple.
Thread
Thread Starter
Forum
Replies
Last Post