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Inline 6 vs. V8 Diesel

  
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Inline 6 vs. V8 Diesel

 
Dieselguy89 Dieselguy89
New User | Posts: 14 | Joined: 08/08
Posted: 08/28/08
02:48 PM

NEWS FLASH JOHNTHAN5 MACK MADE A V-8 DIESEL BACK IN THE 70'S AND 80'S IN ITS SUPERLINER TRUCKS  

Edward A. Sanchez Edward A. Sanchez
Administrator | Posts: 2112 | Joined: 07/06
Posted: 08/28/08
05:23 PM

Well, some of the really, really big ones are inline 12s and 14s:
Worlds Largest Engine  

Kazairl Kazairl
User | Posts: 83 | Joined: 08/07
Posted: 08/29/08
05:33 PM

DieselGuy.
#1 Your confusing how the engine is designed and how its configured. Replace (Inline) and (V-8) with (cummins) and (Ford/Chevy) and I'd agree with you.
#2 Mack was never famous for making the best engines.
#3 Is it really necessary to leave your caps turned on?  
02 Dodge 2500 QC LB NV5600 4.10 D60+D80 285/75R16 Wild Country AT 16x? Eagle Alloy wheels Quad Adrenaline, Edge Jammer 3, Afe Stage 1, Afe 4" Straight pipe, Autometer Cobalt gauges.

overby3 overby3
User | Posts: 69 | Joined: 09/08
Posted: 09/26/08
08:01 PM

I-6 is better hard to say when your a die hard chevy fan but i dont like any chevy trucks newer than 06 because of the bulky body and i hate tht chevy doesnt use a solid front axle because that IFS is killing chevy in off road usage.  

cbrownell cbrownell
New User | Posts: 1 | Joined: 08/11
Posted: 08/31/11
03:57 PM

V8 Diesel suck more gas and has a lot less power then inline 6 engines.  First I am a truck driver, therefore that is the reason that 18 wheeler use I6s and not V8 here is some supporting factor to back up my claim. www.duramaxdieselspecs.com, the specs on the v8 engines only; 300 hp at best and 520 lb-ft at best.  That was based off 6.6L Duramax LB7.  Now for the cummins (I6) www.cumminsdieselspecs.com; as of spring of this year the I6 can now output 350 hp and 800 lb-ft of torque as well as the fuel efficency.  That is 50 more horsepower and 280 more torque than the v8.  Anyone that dares to say that v8s are better speak now and show proof because everything pointing to the I6 as the better engine in fact when I purchase Chevy 3500 I will special order it with I6 cummins.  Thats the number 1 reason a lot people that don't have a clue about these engines assume diesel are more expensive than gasoline. however, I believe Gas is more expensive only because you have refuel more often in the same one hour time the I6 will only burn 1 gallon of fuel while sitting in traffic (Los Angeles Traffic) versus the v8 diesel and gasoline engine vehicles. Thats my 2 cents on this topic.  

jason.thompson jason.thompson
Guru | Posts: 839 | Joined: 06/08
Posted: 09/01/11
08:09 AM

Inline versus V engines is hard to make direct comparisons because there are many variables between engines.

Angle of the V also has a lot to do with how the forces act on the crankshaft.

For example number of pistons also has a say. Why do small inline four engines need balancer shafts?

Opposed Piston and boxer engines have a better natural balance. A simple way to tell how good an engine is balanced has to do with how robust the block needs to be to contain the wiggles. A rotary diesel engine the military is now developing for attack drones is also neat.

Packaging the engine is one concern. Airplanes have great engines and many are V because of packaging and power density. DELTA HAWK DIESEL

I'd like to see a diesel VR6 Volkswagens VR6 engine was the worlds first 6-cylinder, narrow-V (15 degrees) engine. Only one cylinder head.  

I'd like to hear what an engineer has to say about this.

Great topic! Grin  
___

My personal goals include developing perpetual motion and bringing power to the people. I’m also working on building a ’87 Ford F-250 7.3L IDI (Project 300) on a paycheck- to-paycheck budget. One day, I’d like it to be a renewable diesel-steam-hydraulic-compressed- air-wind-solar-infinitely-variable-transmission-equipped hybrid, but until then, I’m just happy to have a simple diesel-powered pickup.

jason.thompson@sorc.com

The_Copenhagen_Kid The_Copenhagen_Kid
User | Posts: 119 | Joined: 03/10
Posted: 09/01/11
08:53 AM

To each his own.  
David
_____________________

Big trucks shouldn't be this fast!

keitha17 keitha17
New User | Posts: 2 | Joined: 09/09
Posted: 09/01/11
11:01 AM

From what I have heard, the V8 has a broader power-band than an I6. Thats why International went with the V8 over the I6 for the 6.9l and later the 7.3. If Cummins is so much more efficient, then why do the new Fords and Chevy's get better fuel mileage than a new Dodge with the HO Cummins? Plus my 7.3 gets 16-18 all day long and ive gotten 21 mpg once and 19-20 a few times. Almost matches a Cummins and the Cummins has 2 less cyliners. Sure the I6 builds torque at a lower RPM. But the 6.4 PSD is getting 1,200+ lb-ft with just intake, exhaust and a Spartan tuner. And its a V8!  

dsltechdvr3667 dsltechdvr3667
New User | Posts: 4 | Joined: 09/11
Posted: 09/01/11
07:46 PM

im a diesel tech/ and im a owner op(trk driver), as a rule a i6 will provide more torque provided the cubic inches are the same,(fords 300 inch 6, verses the ford 302v-8, yes i know its a gas motor but the 300-6 would always out pull a 302 v8)   how ever it depending upon bore and stroke of said engine,i6 is usally a large bore ,long stroke motor ,v-8 smaller bore shorter stroke,higher rpm band, the size of the engine and the bigger they get the worse the vibration comes, and sooner or later vibration tears the motor aprt  the technology and cost of operation is what keeps i6 under the hood of semis  and the wieght factor 4-5 mpg was good with a v-8 ,i6 were getting up to 8mpg before the dpf and all the emission add ons, i6 now are getting 5.4-6.2mpg if there lucky .  not to mention to get v8 to fit in these aero style trks,,,somebody said mack has never made a good engine,,boy you are wrong there and v8 macks , the superliners yeah they were a tough motor, cummins KTA
couldnt and 1693 cats couldnt unless somebody messed with the pumps  

dsltechdvr3667 dsltechdvr3667
New User | Posts: 4 | Joined: 09/11
Posted: 09/01/11
07:49 PM

buddy of mine has a new dodge,,says it wont pull any better than the 3 yr old one did with 250k miles, and he lost 4mpg ,  

dsltechdvr3667 dsltechdvr3667
New User | Posts: 4 | Joined: 09/11
Posted: 09/01/11
07:53 PM

biggest complaint hes got with new cummins the dpf failure,, 4 times so far , last time warrenty says they wont replace it ,  

dsltechdvr3667 dsltechdvr3667
New User | Posts: 4 | Joined: 09/11
Posted: 09/01/11
08:26 PM

the narrower the v ,or the closer in becomes in line the more torque a engine has,how ever opposed cylinders (flat) has even greater tq and the part about balance your perfectly correct  

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