Monotherm pistons

blackbetty13 · Feb 28, 2012

91turbogsx said:
Call Swamps and find out what these will go for...

I'm sorry but the bowl isn't dead center! Does it matter ?

02BigD · Feb 28, 2012

blackbetty13 said:
I'm sorry but the bowl isn't dead center! Does it matter ?

Unique bowl structure and placement for different applications.

Chvyrkr · Feb 28, 2012

blackbetty13 said:
I'm sorry but the bowl isn't dead center! Does it matter ?

Well, it's a 7.3 piston...

So it looks about right.

Big Bore · Feb 28, 2012

blackbetty13 said:
I'm sorry but the bowl isn't dead center! Does it matter ?

Anyone with the ability to design and make one with the bowl off center surely had a well researched reason, which I'm fairly confident has to do with where the fuel hits the bowl area. If you are worried about "balance", consider how many pistons have relief cuts for valve protrusion on one side.

Hotrodtractor · Feb 28, 2012

blackbetty13 said:
I'm sorry but the bowl isn't dead center! Does it matter ?

Ughh... maybe that's because the factory bowl is off center and the injector is actually off center? Just maybe.....

Big Bore · Feb 28, 2012

Hotrodtractor said:
Ughh... maybe that's because the factory bowl is off center and the injector is actually off center? Just maybe.....

And maybe thats why the pistons can only be installed one direction on the rod?

Big Bore · Feb 28, 2012

Factory Mahles with bowl work and coating.

Powerstroked162 · Feb 28, 2012

Hotrodtractor said:
Ughh... maybe that's because the factory bowl is off center and the injector is actually off center? Just maybe.....

Sir, surely you jest... This makes to much sense

blackbetty13 · Feb 28, 2012

Ohhh ok that explains it

Big Bore · Feb 28, 2012

blackbetty13 said:
Ohhh ok that explains it

Does it? Are you sure? Because we really want you to be perfectly at ease with the design from one of the foremost innovators and experts on 7.3 Powerstroke parts, and you really seemed to seriously question their design.

Chvyrkr · Feb 28, 2012

97spoolinstroker · Feb 28, 2012

does any one know what the price is on the mahle monotherm for the lly d-max

JDub · Feb 28, 2012

The forged set Mahle made for us turned out perfect. They make a hell of a product, just don't see the demand there for 7.3L Monotherms though.

juniort444e · Feb 28, 2012

Lets just say I wanted them to make me one set. How much would I be looking at spending. And would they even do it.

Im still having a hard time comprehending why its so hard to make these if they have all the dimensions and what not.

Hotrodtractor · Feb 28, 2012

juniort444e said:
Lets just say I wanted them to make me one set. How much would I be looking at spending. And would they even do it.

Im still having a hard time comprehending why its so hard to make these if they have all the dimensions and what not.

Making them is not hard. Making them so you can afford them is. They have various different piston designs and run pistons in batches - they have a minimum batch size that they will not do less than for anyone - its not worth their time to tool up and make 8 pistons unless you want to fork over 6 figures for those 8 pistons - no one would do that.

If you guys are truly interested in a custom built piston for whatever your purpose - there are plenty of companies that will do that for you in very small batch orders - even quantities that are small enough to do just one engine, and they will do it cost effectively - but perhaps they won't have the exact same material properties of a monotherm. Machined billet - cheaper than forged in small quantities.

02BigD · Feb 28, 2012

Big Bore said:
Does it? Are you sure? Because we really want you to be perfectly at ease with the design from one of the foremost innovators and experts on 7.3 Powerstroke parts, and you really seemed to seriously question their design.

LOL !!!

juniort444e · Feb 28, 2012

Hotrodtractor said:
Making them is not hard. Making them so you can afford them is. They have various different piston designs and run pistons in batches - they have a minimum batch size that they will not do less than for anyone - its not worth their time to tool up and make 8 pistons unless you want to fork over 6 figures for those 8 pistons - no one would do that.

If you guys are truly interested in a custom built piston for whatever your purpose - there are plenty of companies that will do that for you in very small batch orders - even quantities that are small enough to do just one engine, and they will do it cost effectively - but perhaps they won't have the exact same material properties of a monotherm. Machined billet - cheaper than forged in small quantities.

Could you send me a few of those companies names. I would love to have a piston that has the characteristics of the monotherms, expand and heat up same as block, more durable and so on. Even if it costs a little more than the Mahles we can get now, i think it would be worth it in the end.

MadDiesel73 · Feb 28, 2012

Billet Steel pistons? How can they be lighter then aluminums?

Charles · Feb 28, 2012

3 or 4 years ago I called everyone. Quite literally EVERYONE listed in the Mahle directory and begged each and every one of them to please for the love of God make me a set of monotherms. Never got anywhere...

If the one above is actually for a 7.3, then maybe some of my extreme cold-calling at least planted a seed.

Hotrodtractor · Feb 28, 2012

MadDiesel73 said:
Billet Steel pistons? How can they be lighter then aluminums?

Piston design. By designing a piston with weight only where it needs to be can come out to the same weight or lighter than an off the shelf production piston. The trick is to put material where it is needed and not where it is not needed. Compare the pictures earlier in this thread with each other and you'll see what I mean.