Not new to the forum but looking for some info...

I have been told that the 6.8l v-10 is basically the same as the 5.4l v-8 only with 2 extra cylinders. Is this true?

I ask because if Ford can get 725hp out of the Super Snake with the 5.4, then doesn't that mean I can build a 6.8l to put out as much or more horsepower?

If the 5.4 and 6.8 are different, then what are the differences?

As I stated before I want to put the v-10 in my 72 Gran Torino next year when I return from Iraq.
Save your breath on all the opinions of why it CANNOT work but lets talk about how TO MAKE IT work.

Help me out with the info please.

THANKS

 

They are similar, sharing the same pistons, rods, valves and other components.

Super snake engine is an entirely different beast with a head design that cannot be had on a V10. Even if you get the heads to flow enough, the block or the crank is going to give.

Good luck though.

 

What about other components? what is different about the heads besides the 2 extra cylinders? why do the v-10s pop plugs and the v-8 not an issue?

IF they are the same or similar then theoretically I could buy 10 pcs instead of 8 and build power in the v10 with the available 5.4l aftermarket parts? to include superchargers/turbos or other parts?
I have all the room in the world under the hood so that is not an issue. I also know there will be MANY modifidied/1 off parts I have to fab for the build.

I have ALOT more research to do!

 

They have popped plugs as well here is the thread
https://www.ford-trucks.com/forums/1...park-plug.html

 

The V10 block is also a 6-bolt main block. That's right, 4-bolt main caps, with cross-bolts too!

The only thing I'd worry about, and it might not even be a big concern if you don't mind the wobble, is that if you change pistons/rods, that they weigh as close as possible to the OEM parts. The balance shaft is setup to counteract the inherent imbalance from all 10 pistons/rods not moving exactly opposite each other. If you change the weights of the rods and pistons, especially the small end of the rod, you run the risk of getting some vibration from the engine that may or may not be an issue.

I'd bring this subject up with a VERY GOOD engine balancer.

Otherwise, there's nothing stopping you from putting out HUGE numbers.

There's a few concerns though.

The front of the crank can snap off in high-boost situations with a supercharger. There are support bearings available aftermarket for the crank snout to overcome this. Or there were.

The stock crank is forged steel, but is a split-pin design which means you need to be careful how far you go on power.

Other than that, getting it to breathe would be the big thing. But not unsurmountable.

Good luck

 

You can get well over 1000hp with a 5.4l, highly modded of course. Should be able to get more out of the V10 than the 5.4l in theory however the 5.4l is supported by the aftermarket MUCH better than the 6.8l. Though the 5.4l and 6.8l share many components.

There are more 5.4ls that blew plugs than 6.8ls by far. The thing with the 5.4l is aftermarket and higher flowing 4V heads are available for it with the 6.8l they arn't, at least to my knowledge. If you want to make 700=hp with a V10 you'll have to beef up the internals, do major, head work, custom cams, and of course a forced induction and/or nitrous.

Sounds like a fun project.

 

Besides this forum is there another site, place, person, or company to talk to about big numbers from the V-10?

SOMEONE has to have experimented and become a pretty good "expert" on these motors?

BTW, THANK YOU for the info above and all the info I am sure y'all will provide!
Pics of my 72 Gran Torino can be seen on www.grantorinosport.org

 

Follow on questions...

1. What year V-10 is the best for the build up I want to do above and why?

2. What Tranny would you use and why? I have read some of the trannys had problems.

3. Does your opinion change if I was to just take the engine, tranny, harness and computer straight out of a truck and slap it in to my hot rod without doing any power build ups?

I ALWAYS appreciate your opinions and guidance!

 

Here's one answer that I would love to have; Vortech Engineering: Viewing product: 1999-2003 Ford F-250, F-350, Super Duty, Excursion Supercharging Systems

 

If you find any, let us know

The V10's reputation as a "heavy-duty truck engine" has basically left it pulling trailers and other loads, and not really racing around.

Strap a turbo/blower on it, dyno/tune it, and there's not much more to it. However, the rods would be the next place to do anything. And cams.