Whos running Mahle Pistons in their 12v? - Page 2 - Competition Diesel.Com

*Soup Nazi* · 11-10-2007, 01:05 PM

Quote:

Originally Posted by AsTroSS

Cummins Marine 370

Mahle 155

I have no picture of Mahle Marine piston

The two pistons here are not alike. This particular Mahle branded piston is weaker than the stock Cummins 370 unit.

Also, be careful there are several "marine" pistons. They are not all alike.

Yes, Mahle makes a great part for the job and their branded pistons are more than good for the intended use. The one pictured above is a great example. It would run great in some marine engines, but would not in the 370 and higher.

I think a part time engine under 600 HP would be fine with the Mahle piston shown. After that, the margins get to thin for me.

I cringed to see these pistons being used in high HP engines in the earlier days. A very prominent engine failed from these pistons too. No, I am not giving out names, etc.

I said earlier to run the Marine 370 piston for a reason.

All that being said: Mahle can make you a heck of a custom slug and makes some of the best top quality stuff in the world. The particular piston shown is not the one you want for serious HP.

AsTroSS · 11-10-2007, 01:19 PM

And here is lots of useful information from *THE* Jeff

PRattenbury · 11-10-2007, 01:47 PM

Dunno if this will work, but I attached a pic of my pistons.

AsTroSS · 11-10-2007, 01:56 PM

Quote:

Originally Posted by PRattenbury

Dunno if this will work, but I attached a pic of my pistons.

Mahle Marine ?

or Cummins Marine ?

PRattenbury · 11-10-2007, 02:52 PM

Cummin to think of it, could be Cummins. Pistons were a topic of a lot of discussion when picking out the parts. And it was several months ago now.

PRattenbury · 11-10-2007, 03:02 PM

Cummin together fairly well now. Should be making noise pretty soon.

AsTroSS · 11-10-2007, 03:07 PM

Here is old topic about pistons:

http://www.competitiondiesel.com/for...ead.php?t=9935

AsTroSS · 11-10-2007, 03:09 PM

Quote:

Originally Posted by PRattenbury

Cummin together fairly well now. Should be making noise pretty soon.

Cut off aluminium intake

PRattenbury · 11-10-2007, 03:10 PM

Only way to get at the intake ports.

*Bobcat698* · 11-10-2007, 05:29 PM

While I don't know if those are the EXACT pistons I run, but I was told Erick Stacey runs the same Mahle 155º pistons that I do, at a lower compression obviously.

Rich Buckley · 11-12-2007, 10:10 PM

the mahle marine piston and cummins are the same part. they both have steel ring inserts, coated skirts, 53.0 cc bowl. std dodge are 45.4cc bowls. mahle marines, with total seal rings cast me 64.72each.

Muddin_dude06 · 11-12-2007, 10:29 PM

What will it drop the CR to by adding Marine 370 pistons with stock gasket and nothing taken off the block? Is the piston height reduced or is the bowl just bigger? And what does it usually cost to get flycuts done on a piston?

*dzlfarmboy* · 11-13-2007, 07:15 AM

Quote:

Originally Posted by BigDodge

the mahle marine piston and cummins are the same part. they both have steel ring inserts, coated skirts, 53.0 cc bowl. std dodge are 45.4cc bowls. mahle marines, with total seal rings cast me 64.72each.

Are you sure?, Who's your source for this info, i've heard other wise.

Rich Buckley · 11-13-2007, 01:00 PM

mahle parts catalog. they have all the spec on all the pistons.

THE TANK · 11-13-2007, 07:33 PM

Is the marine 370 a good piston to lower compression and or different gasket?

PRattenbury · 11-15-2007, 06:58 PM

Here ya go, Luke! Maybe....

luke h · 11-15-2007, 09:27 PM

Thanks bud! I believe they are the same! ill send you some pics of my build as soon as i get it done. Im degreeing the cam tomorrow and then all thats left is the block stiffener, pan, front cover, head, and some tunning!

Jim Fulmer · 11-15-2007, 10:48 PM

Quote:

Originally Posted by PRattenbury

Here ya go, Luke! Maybe....

What's the part number for the Cummins 370 Marines.

Jim

PRattenbury · 11-16-2007, 05:50 AM

I actually do not know. I had a small diesel shop in Massachusetts collaborate with another diesel shop in Effingham on my shortblock. My fuel and air were supplied by a company out in Utah. Now my truck is being reassembled in Connecticut, and will then be sent back to Massachusetts for an overall pre-flight inspection before it gets sent to me in Little Rock. I was hoping to collaborate with you in the early part of '08 on some fine tuning of twins and the finer points of other subjects I hear you are familiar with. You aren't that far away from me in Oklahoma, methinks. Do you ever help people less educated in high horsepower rigs become more savvy?

Jim Fulmer · 11-16-2007, 08:09 AM

Quote:

Originally Posted by PRattenbury

I actually do not know. I had a small diesel shop in Massachusetts collaborate with another diesel shop in Effingham on my shortblock. My fuel and air were supplied by a company out in Utah. Now my truck is being reassembled in Connecticut, and will then be sent back to Massachusetts for an overall pre-flight inspection before it gets sent to me in Little Rock. I was hoping to collaborate with you in the early part of '08 on some fine tuning of twins and the finer points of other subjects I hear you are familiar with. You aren't that far away from me in Oklahoma, methinks. Do you ever help people less educated in high horsepower rigs become more savvy?

No one around here making power but I do get allot of Calls/E-mail saying.....help me make power. It would be nice to have some sort of sideline business selling parts but they are everywere now and not any business locally.

Jim

11-10-2007, 01:19 PM	#22
AsTroSS Name: AsTroSS Title: problems start @80 psi Status: Not Here Join Date: May 2006 Location: Europe Member`s Gallery Posts: 4,327	And here is lots of useful information from THE Jeff __________________ Ram 2500 '98 QC 12V Cummins 4x4 automatic --->project: T-25 Ram 1500 ‘ 97 QC 12V Cummins conversion 4x4 automatic - ->project: T-15 Superb '21 -TDI 2.0 CR-205hp

11-10-2007, 02:52 PM	#25
PRattenbury Name: PRattenbury Title: Neophyte Status: Not Here Join Date: Jan 2007 Location: Connecticut Member`s Gallery Posts: 1,095	Cummin to think of it, could be Cummins. Pistons were a topic of a lot of discussion when picking out the parts. And it was several months ago now. __________________ 1994 2500 4x4 with a couple mods If corn oil is made from corn and vegetable oil is made from vegetables, what is baby oil made from?

11-10-2007, 03:07 PM	#27
AsTroSS Name: AsTroSS Title: problems start @80 psi Status: Not Here Join Date: May 2006 Location: Europe Member`s Gallery Posts: 4,327	Here is old topic about pistons: http://www.competitiondiesel.com/for...ead.php?t=9935 __________________ Ram 2500 '98 QC 12V Cummins 4x4 automatic --->project: T-25 Ram 1500 ‘ 97 QC 12V Cummins conversion 4x4 automatic - ->project: T-15 Superb '21 -TDI 2.0 CR-205hp

11-10-2007, 03:10 PM	#29
PRattenbury Name: PRattenbury Title: Neophyte Status: Not Here Join Date: Jan 2007 Location: Connecticut Member`s Gallery Posts: 1,095	Only way to get at the intake ports. __________________ 1994 2500 4x4 with a couple mods If corn oil is made from corn and vegetable oil is made from vegetables, what is baby oil made from?

11-10-2007, 05:29 PM	#30
Bobcat698 Name: Bobcat698 Title: Pure Diesel Power Status: Not Here Join Date: Apr 2006 Location: Marshfield, WI Member`s Gallery Posts: 2,229	While I don't know if those are the EXACT pistons I run, but I was told Erick Stacey runs the same Mahle 155º pistons that I do, at a lower compression obviously. __________________ Pure Diesel Power 715-254-1833

11-12-2007, 10:10 PM	#31
Rich Buckley Name: Rich Buckley Title: Opie shaft twister Status: Not Here Join Date: Feb 2007 Location: Hanceville Al. Member`s Gallery Posts: 1,219	the mahle marine piston and cummins are the same part. they both have steel ring inserts, coated skirts, 53.0 cc bowl. std dodge are 45.4cc bowls. mahle marines, with total seal rings cast me 64.72each. __________________ 00 Pete 379 EXHD 650hp C16 18spd, Bullseye Batmo 80mm, FASS 250.

11-12-2007, 10:29 PM	#32
Muddin_dude06 Name: Muddin_dude06 Title: ... Status: Not Here Join Date: Sep 2007 Location: Chandler OK Member`s Gallery Posts: 2,541	What will it drop the CR to by adding Marine 370 pistons with stock gasket and nothing taken off the block? Is the piston height reduced or is the bowl just bigger? And what does it usually cost to get flycuts done on a piston? __________________ '96 2500 4x4 5sp. 3” Full Long arm lift w/35's ValAir DD Clutch w/ Input DFI 5x.012’s, O-ringed, 625’s Hamilton 178/208, pushrods, PDD street springs, S362sxe/.7WG ‘12 LML crew cab swb 4x4 RC 3.5” lift with 33’s Anarchy tune 5” exhaust w/ Jones 5050XL

11-13-2007, 01:00 PM	#34
Rich Buckley Name: Rich Buckley Title: Opie shaft twister Status: Not Here Join Date: Feb 2007 Location: Hanceville Al. Member`s Gallery Posts: 1,219	mahle parts catalog. they have all the spec on all the pistons. __________________ 00 Pete 379 EXHD 650hp C16 18spd, Bullseye Batmo 80mm, FASS 250.

11-13-2007, 07:33 PM	#35
THE TANK Name: THE TANK Title: rookie Status: Not Here Join Date: Sep 2007 Location: Eastern shore of Maryland Member`s Gallery Posts: 217	Is the marine 370 a good piston to lower compression and or different gasket? __________________ 2006 3500 loaded 6spd, bully dog 1990 dodge 550 SCRAPED! Now pullin 1989 peterbilt 400++ cummins TEAM MONKEY BUSINESS

11-15-2007, 09:27 PM	#37
luke h Name: luke h Title: Too Much Time Status: Not Here Join Date: May 2007 Member`s Gallery Posts: 298	Pistons Thanks bud! I believe they are the same! ill send you some pics of my build as soon as i get it done. Im degreeing the cam tomorrow and then all thats left is the block stiffener, pan, front cover, head, and some tunning!

11-16-2007, 05:50 AM	#39
PRattenbury Name: PRattenbury Title: Neophyte Status: Not Here Join Date: Jan 2007 Location: Connecticut Member`s Gallery Posts: 1,095	I actually do not know. I had a small diesel shop in Massachusetts collaborate with another diesel shop in Effingham on my shortblock. My fuel and air were supplied by a company out in Utah. Now my truck is being reassembled in Connecticut, and will then be sent back to Massachusetts for an overall pre-flight inspection before it gets sent to me in Little Rock. I was hoping to collaborate with you in the early part of '08 on some fine tuning of twins and the finer points of other subjects I hear you are familiar with. You aren't that far away from me in Oklahoma, methinks. Do you ever help people less educated in high horsepower rigs become more savvy? __________________ 1994 2500 4x4 with a couple mods If corn oil is made from corn and vegetable oil is made from vegetables, what is baby oil made from?