How come we suck??
Fleet Mechanic
Joined: Jan 2006
Posts: 1,510
Likes: 7
From: Anchorage, AK
Nope...not wanting to start trouble at all. But to me seems like we're going against the grain. Show me a 9 sec 6 cyl car...won't find any. So why is it that a V8 config makes less sense in a diesel? There are plenty of 2000+ HP cars out there and none of those are inline 6s. I'm just trying to figure out why the inline 6 works better for high HP diesels...or does it????
Post Fiend
Joined: Feb 2006
Posts: 11,892
Likes: 2
From: Middle Tennessee
Yes, nothing replaces displacement, nothing. Now forced induction engines artificially increase the displacement and therefore the fuel that can be burned. That means you need to put more air (oxygen) in there and more fuel to make more power. The 7.3 falls on it's face here where the 5.9 just takes a pounding and asks for more. That is as simple as I can make it. The 7.3 was not built to make 400hp, like I do, let alone 800-1000 like many 5.9s do. Yeah, there are many 500hp plus 7.3s out there. They usually lead a short life unless carefully tuned and well cared for.
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Freshman User
Joined: Aug 2009
Posts: 31
Likes: 0
y
Again how come??? Some mention the Skyline, Supra...blah, blah. Look up any Top Fuel Dragster and tell me how me 6 cylinders you see
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Freshman User
Joined: Aug 2009
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BUT...we should be better
Posting Guru
Joined: Dec 2003
Posts: 2,392
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From: NW Arkansas
We are saying that $ for $ the 5.9 is better.. however.. if you say go crazy with $$$ i'm sure a 7.3 would put out more power than a 5.9...
Posting Guru
Joined: May 2007
Posts: 1,967
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From: Bowling Green, Kentucky
Yes, nothing replaces displacement, nothing. Now forced induction engines artificially increase the displacement and therefore the fuel that can be burned. That means you need to put more air (oxygen) in there and more fuel to make more power. The 7.3 falls on it's face here where the 5.9 just takes a pounding and asks for more. That is as simple as I can make it. The 7.3 was not built to make 400hp, like I do, let alone 800-1000 like many 5.9s do. Yeah, there are many 500hp plus 7.3s out there. They usually lead a short life unless carefully tuned and well cared for.
Fleet Mechanic
Joined: Jan 2006
Posts: 1,510
Likes: 7
From: Anchorage, AK
I wasn't saying inline 6s are the fastest in the world, but that they deserve respect too. Top Fuel Dragsters make 8000 hp for about 4 seconds and then they get completely rebuilt and for once, cost most than a 7.3 to play with.
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Posting Guru
Joined: Dec 2003
Posts: 2,392
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From: NW Arkansas
But why would you want that much power?
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Freshman User
Joined: Aug 2009
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I am getting the impression you may need to look into what people are actually saying to you.
I wasn't saying inline 6s are the fastest in the world, but that they deserve respect too. Top Fuel Dragsters make 8000 hp for about 4 seconds and then they get completely rebuilt and for once, cost most than a 7.3 to play with.
I wasn't saying inline 6s are the fastest in the world, but that they deserve respect too. Top Fuel Dragsters make 8000 hp for about 4 seconds and then they get completely rebuilt and for once, cost most than a 7.3 to play with.
Post Fiend
Joined: Feb 2002
Posts: 10,600
Likes: 3
From: Carhenge
It's all weight to horsepower ratio in the gas motorsports world. An I-6 design engine is inherently heavier for the same displacement, and therefore undesirable in the gas world. Strength and longevity of parts doesn't matter because every engine gets rebuilt every run.
The industrial world is absolutely dominated by the I-6. Weight doesn't matter, it's all about strength and reliability. The diesel engine needs a large mass rotating assembly to be strong enough to stand up to the torque. The greatest stress put on any engine component is when the piston changes directions at the top or bottom of it's stroke. The gas world is low torque, high revving, so they use light rotating assemblies so the components can handle the stress. Diesel engines have very heavy piston/rod combinations to handle the compression and torque. The I-6 lends itself to these heavy rotating assemblies because the stresses of the heavy pistons changing direction occurs on a single plane, instead of two planes of a V configuration.
The industrial world is absolutely dominated by the I-6. Weight doesn't matter, it's all about strength and reliability. The diesel engine needs a large mass rotating assembly to be strong enough to stand up to the torque. The greatest stress put on any engine component is when the piston changes directions at the top or bottom of it's stroke. The gas world is low torque, high revving, so they use light rotating assemblies so the components can handle the stress. Diesel engines have very heavy piston/rod combinations to handle the compression and torque. The I-6 lends itself to these heavy rotating assemblies because the stresses of the heavy pistons changing direction occurs on a single plane, instead of two planes of a V configuration.
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Posting Guru
Joined: Sep 2007
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From: Knoxville, TN
But.......You may be in luck. Swamps seems to be coming out with some things lately that may make some big HP numbers, but who knows.
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Post Fiend
Joined: Feb 2006
Posts: 11,892
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From: Middle Tennessee
I had a 5.0 mustang. I know what you are talking about and that engine/car was singularly responsible for the resurgance of the pony car or muscle car era in the 80s. Even forcing Chebby to put vette engines in the Crapmaro to compete.
Look at the redline on your tach. Think that one over. That is a design limitation, as is the injector's ability to get the fuel in at the right time at the right quantity. There are folks working on a common rail for the 7.3. That along with a built engine could have you in a 2010 6.4 SD for the money.