Competition steel monotherm pistons for b series...

[nickleinonen]

i was randomly googling stuff and ran across this...



Introducing Mahle's Steel Monotherm Diesel Race Piston - Why Go Sixty? - Why Go 60?



i searched here and didn't find anything posted on the tdr about them so i thought i'd post this...



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[RHestand]

I'll be watching for more info. on this piston.

I'm curious as to wt. comps. to alum. pistons, how it effects higher rpm diesel race engines.

I know they use steel pistons in some of the big over the road (OTR) truck motors I've read about, but they run at much lower RPMs than race engines.

I would think steel could tolerate much higher EGTs? If anyone has info on steel pistons, chime in.

Thanks, Ray

 

[BigYellowIron]

Talked to them today. Its not production yet. They was advertising to drum up intrest and to start testing these. Sounded like the cost to start with was going to be about double the cost of a current forged piston i. e. ross or aries.

 

[PSU-CE]

I've read some blurbs on these (monotherms) and here's what Ive gathered: I've heard they weren't recomended for over 4500 rpm. I also heard mixed answers on the weights being higher than aluminum, yet another report is the weight is equal due to the sidewall cuts (I would think they wouldn't want to make them heavier). One advantage may be the reduced compression heights, due to using steel over aluminum, which may help to allow for some stroking using a custom rod design? Maybe someone smarter on stroking can chime in. Another positive is the heat expansion is not as much of a concern so they can be installed with greater bore tollerances. They also come factory coated from Mahle.



On another note, has anybody heard any good or bad about the diesel pistons Ross offers?

 

[BigYellowIron]

On another note, has anybody heard any good or bad about the diesel pistons Ross offers?

Garret at Pure Diesel Power, He runs and sells them.

 

[F8LDOSE]

We use that piston in our engines at work (macks and volvo's) Their really a nice looking piston, i'm sure you could run much tighter sidewall clearances with them than stock casts, less blowby at high boost and high temps. They do weigh a ton thou. If my old 200k mile engine will ever blow up for me at the dragstrip, i'm gonna rebuild with them, but i don't see over 3600rpm at 122mph.

 

[Bobcat698]

I run the Ross pistons. I ruined the first motor I put them in so I can't give an opinion on the pistons yet

 

[John Robinson]

We are running a set of these pistons. So far we are the only ones to be testing them. They are a little heavier but we are turning 5200 rpm & havent seen any problems. They handle the heat for sure, we are showing no signs of wear anywhere on the piston. You do have to modify the wristpin area to make them work with b rods, not too much though. The rings have a cumminspart #. The compression with a stock headgasket is 15. 8 to 1. They are a little pricey but if they last & will allow you to get by with murder, they will have a market. You guys can give me a call if you have more questions