V12 for you power people

[Tom Y]

Theres an auction next Sat with a 70 Kenworth advertised with a V12. I would think 2 6s bolt together, or did they make a block for the 12?  Tiona Pa www.petersonauction.com   Tom Y

[06 Bill]

Tom it is my understanding that the V12's were their own 12 cyl block. Fondly called the BUZZIN DOZEN.  06 Bill

[TomC]

The 12V-71 had its' own single cast block with two 6-71 heads and two 6V-71 blowers.  They weighed in at about 3,250lbs and the non turbo'd version put out twice what a 6-71N put out-or 476hp and 1200lb/ft of torque.  Many went over 800,000 miles before overhaul-was one of those engines that were perfectly balanced and extremely strong.  Turbo'd with 80 injectors, you could get 600hp and 1800lb/ft torque-now that's some power-but not good fuel mileage.  Detroit also made about 300 24V-71TTA's for marine use that used 4 turbos, 4 blowers.  The sport fishers loved them because they were low profile and verrrry smooooth.
As comparison, the new Detroit Diesel DD15 has a 560hp and 1850lb/ft power setting, is 4 stroke, weighs less at 2,880lbs and will get close to twice the fuel mileage.  Amazing how technology marches on.  Good Luck, TomC

[Tom Y]

Tom C, Maybe you should look at this for your new buggy. They say 239k original miles on complete truck.  Tom Y

[TomC]

Tom Y- actually if I were rich to the point I didn't care about fuel mileage, I really did want a twin turbo 12V-71TTA for my engine- there is no other engine that puts out a growl like a 12V-71.  But alas, I can't afford 4 mpg (my Caterpillar 3406 will probably get in the 6-8mpg range).  Good Luck, TomC

[Diesel_Gypsy]

Years ago I had a "Dirty Dozen" in a 72 Kenworth conventional. It was great fun then (I was younger) and fuel was cheap!

I can't vouch for them living a long time though, since I had to rebuild mine twice in the six years I had it. Once in-frame and once out of frame complete overhaul.

The second time around, I put in a set of matched, high performance, modified injectors. What a blast! When we put it on the dyno, it put just over 500 hp to the ground!

I could pass anything on the road except a fuel station. If I was using the power (and of course I always was!), I would get as low as 3.5 mpg! And those are Canadian gallons too.

Also I could mention that I had dual 5" straight pipes on it! Could be the reason why people have to yell at me all the time now. lol

Later. . .
Jim