A couple inline six questions

[Conki]

Yeah why does it have to be aluminium?
If I understand correctly, you want to create a display engine, right?
Is it going to be a cutaway? Then I understand you want a SOHC design for simplicity and clarity, but why is there a material requirement?
And I6 engines are in perfect balance, yes, but if it's not going to run, why does it matter?
And even if you plan to run it, any other engine would have low vibration with factory balancer.

[SpecM]

You mean OHV.

yes, and the Jeep 4.0 is a pushrod (OHV) engine anyway

the cam is in the block, not head

[Bimmerman325i]

Why aluminum? For an art project, the material doesn't seem like it should matter. Hell, spraypaint a $100 M20B27 block to look aluminum if it really matters.

[Fusion]

Oh, I didn't notice the Jeep isn't SOHC.
I was thinking it would be easier to work with the aluminium block if we wanted to do a cutaway on one of the cylinders or drill/thread parts if we need to, and the small weight difference.

[Conki]

Oh, I didn't notice the Jeep isn't SOHC.
I was thinking it would be easier to work with the aluminium block if we wanted to do a cutaway on one of the cylinders or drill/thread parts if we need to, and the small weight difference.

Aluminum engines are newer, so they tend to come with DOHC, so you've got a decision to make here.

[tjts1]

The solution is simple. BMW M70. V12 (2 inline sixes), Alloy block, SOHC, dirt cheap. Lose all the ancilary BS, and cut away. Would make a hell of an art project.

[Danny]

^Not a bad idea.

You can find them pretty cheap too.

[bimmerfan46]

The solution is simple. BMW M70. V12 (2 inline sixes), Alloy block, SOHC, dirt cheap. Lose all the ancilary BS, and cut away. Would make a hell of an art project.

That would work well because you could leave one side intact and do a cutaway on the other.

[e34john]

Toyota stuff from 1980 or older.

[u3b3rg33k]

I still haven't figured this out, not even google knows. This is at idle btw.
And would anyone take a wild guess at what the crank power output might be at idle, no accessories, on let's say a ~200hp M52?

Idle as in ONLY idling the engine? or idle as in WOT at idle RPM?
the answer is either virtually zero (steady state means no spare HP), or a lot more than zero.

[gearheadE30]

yes, and the Jeep 4.0 is a pushrod (OHV) engine anyway

the cam is in the block, not head

I had no idea; I stand corrected.

M70 is a good idea...and if you really need a 6, just cut the crank case in half and see if an M20 crank or something would fit....