what's the difference? 8V92 vs. 6V92TA

[Roader]

What is the difference between the 8v92 and the 6v92TA in regards to power and fuel consumption. I have seen older newells with both. I understand the 6 is a turbo and the displacements for both engines is nearly the same. What kind of fuel mileage would I expect from on to the other? I know gearing and tranny play a role in mpg, but I am just trying to get an idea about power vs. fuel consumption.

Thanks you guys!

[chockwald]

The main difference is the 8V92 is a V-8, or 8 cylinder engine with an, obviously, larger displacement. The 6V92 is a V-6 with a turbo aftercool. The 6V92 turns out 350 horsepower with the turbo. I would be surprised to find an 8V92 without a turbo, but I would guess if it is pre "silver" then that is possible.

[The Newell]

The two engines are functionally equivalent with the 350hp 6v92 obviously having more horsepower. Advantage of the 6v92 is 25% less stuff when it comes time to rebuild. Fuel mileage is really dependent on the newell and your right foot. It takes the same amount of energy to move the coach down the road regardless of engine. Now, if you use the extra hp to get up the hills 20mph faster.... that burns more fuel. Given the opportunity to have either engine in comparable condition and equal money, Well thats up to you! I would only be interested in a silver series engine if it was me DD had a few issues with the pre silver series.

[Roader]

Originally Posted by chockwald

The main difference is the 8V92 is a V-8, or 8 cylinder engine with an, obviously, larger displacement. The 6V92 is a V-6 with a turbo aftercool. The 6V92 turns out 350 horsepower with the turbo. I would be surprised to find an 8V92 without a turbo, but I would guess if it is pre "silver" then that is possible.

I failed to mention silver series after 8V92 sorry. That said does your reply still stand? I noticed your information states your running a 6V92TA how well does it preform on grades? Do you have plenty of power? and whats your rpm range? Also do you run hot by the time you reach summit? Thanks again for your reply.

[farmell]

My choice for the difference in power, weight reduction, cost of repairs is hands down the 6v92T Silver series. The horsepower can be turned up on both beyond anything practical. Torque may be an issue for a 40 plus footer pulling a heavy trailer. 2-stroke wise the 6v92T Silver is the king! I would take this motor over any V-8 Cummins or Cat. Owned them all in machinery, farm equipment, motorhomes and the list goes on. There are plenty of parts for this engine compared to the others.

[chockwald]

The 8V92 silver without TA generates around 430 horsepower.....with TA around 500 horsepower. I pull a 26' enclosed car hauler trailer with a 2002 T'Bird inside, plus several bikes, tools, etc. Climbing a steep grade for several miles will push my temp to 200, but that is well below the danger line. Without the trailer and car the coach weighs in at 29,000 GVW loaded with fuel, fresh water. With the trailer and car it's up to 38,000 GVW. On a long climb with the trailer I am down in 3rd gear and running pretty much 2000 rpms, near red line. Running high rpm's helps keep the temperature down. There are two keys to keeping the temps down.....run in a gear you can keep the rpm's near redlline, and keep the rear facing radiator clean. A good steam cleaning at least once a year is in order.

[fulltiming]

Really boils down to: how heavy is the coach, how heavy a load is being towed and how much mountain driving do you intend to do. My '92 has the 8V92TA, 500 HP. I weigh 45,000 pounds and tow a 3,400 pound car. I travel enough in the mountains to want all the power I can get my hands on. I am currently in Lusk, WY, elevation 5,034' headed for Cheyenne, Denver and Albuquerque. Wouldn't want any less engine than I have.

[Roader]

Originally Posted by fulltiming

Really boils down to: how heavy is the coach, how heavy a load is being towed and how much mountain driving do you intend to do. My '92 has the 8V92TA, 500 HP. I weigh 45,000 pounds and tow a 3,400 pound car. I travel enough in the mountains to want all the power I can get my hands on. I am currently in Lusk, WY, elevation 5,034' headed for Cheyenne, Denver and Albuquerque. Wouldn't want any less engine than I have.

Are you recommending at least purchase a used newell with the 8V92 for the HP & Torque?

[fulltiming]

Depends on the year/weight of the Newell. You won't find any 1990 or newer (Series 2000) Newells with a 6V92. Most of the widebody Newells (started in 1986 had the 8V92. Prior to the widebody, you will find 6V92s, Cat 3208 and Cummins 903 until you get back into the 70's where you will find Cimmins 555 Cat 1106 and the 391 Ford Industrial. I happen to like the 8V92. If you maintain them, run 40 wt, CF-2 oil and DON'T OVERHEAT them. They are a fine engine.

[prairieschooner]

I like the fact that you are a fan of the 6V92, what years are the Silver Series?

[jdaniel]

I knew nothing about a Detroit until I bought my 1991 six years ago. Mine is the 8v92 and I've been very impressed. Living in the southeast, we don't have the mountains you guys do and it's really on our flat highways.

[77newell]

Anything after about 1982 will be silver series, for a few years before that the changes were gradually introduced.