I called to get one of those blocks at Prefix...Got the P# and the price, and they can't get one, allegedly....I was told to call the dealer.

Of course.
Where do I apply to have the laws of physics, properties of metals, inertia, heat transfer, etc. suspended for my project? Because my own ideas are better...

Knowing Chuck's exposure to technology and acceptance to change, I cannot dispute the gain. Possibly some members should live in a dyno cell, as the afore mentioned Engine Masters winner does.

So, what exactly are you building?

Man that's what I was thinking. What is it going in and are you going to "race it"

The thought of a aluminum G3 in my 99 Dakota is very interesting.

This block is available to everyone or just the favored few racers?

It's hard to think outside the box when the head stuck inside the box is located deep inside an anal cavity.

"Old theory": quench, developed and patented by Harry Ricardo before WWI.
But we know better now...

Of course we know more now! - Engine design and development has continued to expand beyond his original work - You are beginning to sound like a first semester engineering student!

Have you tried the dealer?

There used to be a few dealer associated people on here I thought?

Prefix may not be that involved with these blocks as they were in the past.

I know they are being produced maybe not as fast as we would like but they exist.

Mike

"You are beginning to sound like a first semester engineering student!"
How odd - that's what people said about me... when I was 12.

Did you notice that you disagreed with something I didn't say? No?

I'd love to explain, really. But the most adamant of my critics has demonstrated his lack of comprehension of the subject, so I'll just let you all believe whatever you want. M'kay?

I'm not trying to be a Male sexual reproductive organ here
But on your http://victorylibrary.com/mopar/m-table-c.htm#SBC

Some of the 6.4 hemi data is wrong, bore is 4.09 and stroke is 3.724 ,Deck is 9.28 not(B) 4.055(S) 3.795 (DH) 9.25
Thank you for posting all the information on that list it has be very helpful

That would make .0000000000000000000000001% of my free information, yes?

Yes and I have enjoyed using/reading the other .999999999999999999999999%

I ask for no further negative posts or comments. Feel free to disagree, but attacking each other is not doing this thread any good.OP

I apologize if it comes off as I'm attacking, that's not my intent.

In this writeup I am comparing aluminum with gray cast iron, common material of engine blocks.

Getting back to science, the problem comes from the relative spring rates (moduli of elasticity) of the metals involved. In relative terms, aluminum is a 10, gray cast iron is a 20, and nodular iron and compacted graphite iron are 30. So it is easy to see that using aluminum would give some problems with stiffness.

HOWEVER, another factor jumps in here and that is how stress applies to bending. We call it different things, but flexing or bending is a way that power is lost in an engine block. Stress is what produces strain, or motion. Stress in a beam in bending is proportional to the moment (bending force) and proportional to the distance from the neutral axis. It is inversely proportional to the moment of inertia. Moment of inertia almost always involves a dimension to the fourth power. So if, for example, you have a main bearing web 1" thick, and you increase it to 2" thick. the distance from the neutral axis increases by factor of two, while moment of inertia increases by factor of 16, 2 to the 4th power (2x2x2x2). You have a 2 in the numerator and 4 2s in the denominator so the increase in resistance to bending is actually increased by a factor of 8, 2 to the 3rd power, or 2x2x2.

If you followed me this far and think it through, it means that to increase the thickness of a beam to compensate for the aluminum extra springiness, you don't have to increase the dimension by 2, you have to increase it by factor of cube root of 2, which is 1.26. So your 1" thick main bearing bulkhead is now 1.26" thick and equally as stiff, and if you want to make it stiffer it doesn't have to be much thicker. Another 0.24" and it is now 1.69 times as stiff as the 1" cast iron.

This only applies in bending, not in straight tensile or compressive stresses. But bending or flexing adds friction and reduces ring seal so it is more important.

R.

Dogdays, thanks for the info!