? about a dodge
05-28-2008, 12:23 AM
#11
Join Date: May 2008
Posts: 13
RE: ? about a dodge
ORIGINAL: Jfsram
Hemi's are not gimmicks. It's just that they are not truck engines. Truck engine should have off idle torque. Hemi's don't start making good power until 4000rpm. In a car they shine. 4000lbs 300's are going low 14's at 99mph. That's the 340 hp.
Complaints from the towing power of a Hemi is due to it's lack of torque.
As for mileage. Not doubt a 340hp engine in a 5000lb or heavier truck is going to be poor.
Either get a 2 door, reg cab, shortie 2wd with a Hemi or step up to a diesel.
Hemi's are not gimmicks. It's just that they are not truck engines. Truck engine should have off idle torque. Hemi's don't start making good power until 4000rpm. In a car they shine. 4000lbs 300's are going low 14's at 99mph. That's the 340 hp.
Complaints from the towing power of a Hemi is due to it's lack of torque.
As for mileage. Not doubt a 340hp engine in a 5000lb or heavier truck is going to be poor.
Either get a 2 door, reg cab, shortie 2wd with a Hemi or step up to a diesel.
06-04-2008, 08:04 PM
#14
6th Gear Member
Join Date: May 2007
Location: Columbia, MO
Posts: 6,347
RE: ? about a dodge
ORIGINAL: Stepman
Well, now you dodge bashers are pissing me off! A hemi is the most efficicient combustion chamber you can come up with. Mine will smoke the tires at will, pull a trailer without effort, and get decent milage doing it. My 04 will smoke my 69..(351)and my 69 hasn't been beat yet. Why do you think they brought this design back after 40 years? It was unbeatable at Daytona and still is.
Well, now you dodge bashers are pissing me off! A hemi is the most efficicient combustion chamber you can come up with. Mine will smoke the tires at will, pull a trailer without effort, and get decent milage doing it. My 04 will smoke my 69..(351)and my 69 hasn't been beat yet. Why do you think they brought this design back after 40 years? It was unbeatable at Daytona and still is.
06-06-2008, 07:57 AM
#15
4th Gear Member
Join Date: Jan 2007
Location:
Posts: 1,999
RE: ? about a dodge
ORIGINAL: gofastbobby
then new "hemi" is not actually a hemispherical combustion chamber like the real hemis were, so yes it is a gimmick, and that thang don't got a hemi.
then new "hemi" is not actually a hemispherical combustion chamber like the real hemis were, so yes it is a gimmick, and that thang don't got a hemi.
I'll attach a link and you explain to all of us what makes a hemi a hemi.
Thanks
http://www.carcraft.com/techarticles.../photo_02.html
06-06-2008, 08:55 AM
#16
1st Gear Member
Join Date: Nov 2007
Location:
Posts: 128
RE: ? about a dodge
ORIGINAL: Jfsram
Sogofast, what makes you the expert on combustion chambers.
I'll attach a link and you explain to all of us what makes a hemi a hemi.
Thanks
http://www.carcraft.com/techarticles.../photo_02.html
Sogofast, what makes you the expert on combustion chambers.
I'll attach a link and you explain to all of us what makes a hemi a hemi.
Thanks
http://www.carcraft.com/techarticles.../photo_02.html
the first picture is a hemispherical combustion chamber. you can tell this, because it's round. Notice, that it is round, completely round and shaped like a hemisphere.
This is the picture from your link that shows the combustion chamber in the new "hemi". It is round-ish, but not completely round. That makes it a polyspherical combustion chamber. It's not something that is new by any sorts, as chrysler has been doing it I think since the '50s. The reason then for making the poly chamber, was cost savings.
You can read more about it on wikipedia, they have a pretty good explanation of it there.
http://en.wikipedia.org/wiki/Hemi_engine
06-06-2008, 09:20 AM
#17
1st Gear Member
Join Date: Jun 2008
Location:
Posts: 66
RE: ? about a dodge
it lost to the toyota tacoma in a tug a war.
In other news my one uncle swears by dodge, hes had 3, bought 2 of them new and one of them used.
Hes got a 1500 4x4 it gets crap gas mileage, but its reliable.
In other news my one uncle swears by dodge, hes had 3, bought 2 of them new and one of them used.
Hes got a 1500 4x4 it gets crap gas mileage, but its reliable.
06-12-2008, 10:10 PM
#18
4th Gear Member
Join Date: Jan 2007
Location:
Posts: 1,999
RE: ? about a dodge
Most importantly the valve are opposed and does not shroud the air flow. When a valve opens up into the middle of a bore air flows completely around it.
On engines with all the valves in one straight row. Air flow near the cylinder walls does not flow as well.
The reason for the slight shape difference between new and old Dodge Hemi is compression ratio.
The 426 did it with monster domed pistons. The new gen Hemi had to reduce the combustion chamber volume to achieve the compression ratio without using moster domes.
On engines with all the valves in one straight row. Air flow near the cylinder walls does not flow as well.
The reason for the slight shape difference between new and old Dodge Hemi is compression ratio.
The 426 did it with monster domed pistons. The new gen Hemi had to reduce the combustion chamber volume to achieve the compression ratio without using moster domes.
Thread
Thread Starter
Forum
Replies
Last Post
MustangForums Editor
Mustang News, Concepts, Rumors & Discussion
1
09-29-2015 03:23 PM