How about joining two 5VZ-FEs together at the crank to create a 6.8 liter V12?

I'm sure it could be done; potential problems would be synchronizing the two halves and also the practicality of mounting and using it in a vehicle.

Any thoughts on this?

 

ya its not practical! unless your building a monster truck. but even with 2 3.4s it would still be way under powered!

 

i'd like to see it done, sounds awesome

 

In the 1920's and 30's car manufactures and race car drivers used engines with four, to even sometimes sixteen cylinders, funny thing is, most of those 16 cylinder engines made only about 110 horsepower, PEAK... More cylinders does NOT mean more horsepower, done right with alot of fabbing, research, development, and years of design might yield insane results in ways of power and torque gain, but it is not worth it to do that. Just supercharge one 3.4, and do a fuel system upgrade.

 

what about a 6.8 w12?

 

its really not that hard, i did it once back in middle school for a science project, but i threw it away cause i didnt have a license so I couldnt drive it and my dad didn't want it taking up the garage space. the bugatti veyron has a w16

 

What would this "6.8l v12" you speak off fit in? Rear engine tacoma?

 

One possible way to do it would be to take a Truck or 4Runner and leave one "half" of it in the stock position, then fabricate more engine mounts and place the other "half" behind it. Then the transmission/transfer case would have to be moved back to accommodate the extra engine length. The shift linkage would have to be modified for the altered position of the transmission. Also, a shorter rear driveshaft and longer front driveshaft would be needed.

A lot of work, but if done, one would definitely have a unique rig!

 

my dad actually told me about a guy he knew who did this with two 22re's
sounded crazy to me

 

It's a neat idea, but there are better candidates for this type of operation.