Home made V12 .... my uncle's next project

[JCH13]

Closer inspection on my part reveals no such locating features... I wonder what kind of jig was used to keep everything aligned.

Everything could have been assembled on a fixture plate before tacking... I dunno though, it's a complicated part to weld up properly!

 

[Sidekicknichola]

The engineering and design to do what your friend believes he can do is beyond his ability. LOL

I'll bet my next paycheck you're wrong. The guy is so insanely smart... like freakishly so, I have no doubt it will be running sooner or later.

Would be much easier to just take two separate Supra Twin Turbo Engine and mount them like tractors do when they have multiple engines for tractor pulls.

Been there done that, one of his last projects:

 

[thescreensavers]

saw your post on reddit lol

He needs to finish this!

 

[repoman0]

Would be much easier to just take two separate Supra Twin Turbo Engine and mount them like tractors do when they have multiple engines for tractor pulls. The engineering and design to do what your friend believes he can do is beyond his ability. LOL

Go away, troll.

Cool project OP, can't wait to see the start up video!

 

[DaTT]

Would be much easier to just take two separate Supra Twin Turbo Engine and mount them like tractors do when they have multiple engines for tractor pulls. The engineering and design to do what your friend believes he can do is beyond his ability. LOL

Ahhhhh, you must know this man to make an assumption like this.

 

[AdamK47]

There needs to be more people like this guy in the automotive world. People that deviate from the norm and don't just do copy and paste projects.

 

[inachu]

I can ask him, not too sure, but it better be right.

I am sure he used something like mathcad or autocad to design it so it would be perfect.

 

[Squeetard]

Designing the cams will be fun.

Those are overhead cam heads. Stock or aftermarket cams for those heads will work fine. Just need to adjust the timing gear postitions for the 120 degree V.

Looks like that was the easiest part as you can see in the pics it is a done deal.

 

[Ferzerp]

Those are overhead cam heads. Stock or aftermarket cams for those heads will work fine. Just need to adjust the timing gear postitions for the 120 degree V.

Looks like that was the easiest part as you can see in the pics it is a done deal.

That's what I was thinking too.

 

[crashtech]

One of the heads is on backwards. I haven't worked it out, but I don't think the firing order will work out to allow stock cams

 

[Sidekicknichola]

One of the heads is on backwards. I haven't worked it out, but I don't think the firing order will work out to allow stock cams

He did this on purpose... from his last email to me, "Reversed one head so there are common ports to the center of the motor"

 

[crashtech]

He did this on purpose... from his last email to me, "Reversed one head so there are common ports to the center of the motor"

I'm not saying it's bad, I'm saying it necessitates the use of custom camshafts (I think).

 

[JCH13]

I'm not saying it's bad, I'm saying it necessitates the use of custom camshafts (I think).

Why do you think that?

 

[crashtech]

Because the camshafts on the reverse mounted head will be turning in the opposite direction than factory, for one.

 

[JCH13]

Because the camshafts on the reverse mounted head will be turning in the opposite direction than factory, for one.

I don't think so. Cam's have to be timed to the crank shaft, not the head. The head gets flipped, the cams get flipped back, indexed to the crankshaft, and then they should be fine. The cam lobes will (generally) be symmetric, so the cam doesn't care if it's turning clockwise or counterclockwise relative to the head.

 

[crashtech]

That's assuming that the cam can be flipped without lobes actuating the wrong valves, which will only happen with certain valve layouts. If so, then there is still the desired firing order to be worked out. It may be that the two I6 orders can be maintained 120° out of phase with each other, but then again maybe not.

 

[JCH13]

That's assuming that the cam can be flipped without lobes actuating the wrong valves, which will only happen with certain valve layouts.

Like I said, the cams are timed to the crank. If the cams and crank still match up (i.e. they don't change orientation with respect to one another), how will the valves be actuated out of time? (I assume that's what you mean by "wrong valves.")

If so, then there is still the desired firing order to be worked out. It may be that the two I6 orders can be maintained 120° out of phase with each other, but then again maybe not.

They sure can be. It's simply a matter of having a appropriate length of belt between the crank, the first two camshafts, and the second two camshafts. Alternatively, adjustable cam pulleys could also be used to solve that issue.

 

[crashtech]

You know what, I am wrong. This is a four cam engine, I am thinking about 2 valve per cyl engines.

 

[Sidekicknichola]

So I've got an evil genius uncle, the guy is a mad scientist, genius, master craftsman, you name it... its amazing what he does.

I swung by his place last night to see his next project.... splicing two 2JZGTE (Supra Twin Turbo) engines together into a single crank operated quad turbo V12.

... its coming together quite well

This 100% custom crank is a thing of beauty

From the first post in the thread - the custom crank

 

[crashtech]

Sidekick, are you mixing up the crank and the cam in your mind? Every time we talk about camshafts, you post a pic of the crank.

 

[JCH13]

You know what, I am wrong. This is a four cam engine, I am thinking about 2 valve per cyl engines.

Faith in humanity is restored! Rare is the day when a discussion is settled amicably on ATG. :beer:

 

[PlasmaBomb]

Great looking hot v

 

[crashtech]

Correct me if I am wrong, but with two of each crank throws being 120° apart and a 120° bank angle, every 120° four pistons will reach TDC simultaneously. This engine must by necessity fire two cylinders simultaneously every 120° instead of 1 every 60° like 60° V12s.

 

[JCH13]

Correct me if I am wrong, but with two of each crank throws being 120° apart and a 120° bank angle, every 120° four pistons will reach TDC simultaneously. This engine must by necessity fire two cylinders simultaneously every 120° instead of 1 every 60° like 60° V12s.

Given the pairings on the crank, that would seem to be the case: it is essentially two I6s operating in parallel.

What're the plans for an ECU? Given the above assumption a single I6-based ECU could drive both engines in parallel... in theory.

 

[MagickMan]

Would be much easier to just take two separate Supra Twin Turbo Engine and mount them like tractors do when they have multiple engines for tractor pulls. The engineering and design to do what your friend believes he can do is beyond his ability. LOL

For the good of all, take a meat thermometer, insert it into one of your ears, then push until you no longer feel the need to make posts like this. Thanks. :thumbsup: