Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 Engine Rebuilding Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
Join Date: Oct 2011
Location: Lafayette, CA
Posts: 750
Garage
You’re correct that we were talking forged pistons. I was just curious if the composition of the aluminum alloy relating to the cylinders was similar to that.
Old 08-26-2018, 01:46 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #61 (permalink)
Under the radar
 
Trackrash's Avatar
 
Join Date: May 2007
Location: Sebastopol, the land of wine and redwoods in The Republic of California.
Posts: 4,848
Garage
Thanks for the clarification. I was confused, too many threads here.

So M142 is one of those new super alloys?
__________________
Gordon
___________________________________
'71 911 Coupe 3,0L outlawed
#56 PCA Redwood Region, GGR, NASA, Speed SF
Trackrash's Garage :: My Garage
Old 08-26-2018, 02:41 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #62 (permalink)
Registered User
 
Join Date: Jul 2005
Location: Atlanta
Posts: 810
Quote:
Originally Posted by Speedy Squirrel View Post
Mahle uses M142. It is on all of their drawings.
Si 11-13%
Cu 2.5-4.0%
Ni 1.75-3.00%
Mg 0.8-1.2%
Fe <= 0.7%
Zn <= 0.3%
Mn <= 0.3%
Other <= 0.2%
Bal Al
M142 offers the dimensional stability of 4032 and the fatigue characteristics of 2618.
Mahle spends 60 Million a year on materials R&D.
That is incredibly accurate! Love it. Same stuff used in their F1 pistons I'm sure.
__________________
No physical quantity completely explains its own existence
Old 08-27-2018, 05:08 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #63 (permalink)
Under the radar
 
Trackrash's Avatar
 
Join Date: May 2007
Location: Sebastopol, the land of wine and redwoods in The Republic of California.
Posts: 4,848
Garage
As a side note this article states that M142 is use for CAST Corvette pistons.

Amazing how metallurgy has advanced in the last few years.

https://books.google.com/books?id=pG1cD2F_iJcC&pg=PA80&lpg=PA80&dq=m142+aluminum&source=bl&ots=QNE4TFdsC-&sig=EUZaJPZ-YWaIQ6wYkbMSyFxTvp0&hl=en&sa=X&ved=2ahUKEwi9nobO44vdAhVi7YMKHWElC90Q6AEwAnoECAAQA Q#v=onepage&q=m142%20aluminum&f=false
__________________
Gordon
___________________________________
'71 911 Coupe 3,0L outlawed
#56 PCA Redwood Region, GGR, NASA, Speed SF
Trackrash's Garage :: My Garage
Old 08-27-2018, 08:48 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #64 (permalink)
Under the radar
 
Trackrash's Avatar
 
Join Date: May 2007
Location: Sebastopol, the land of wine and redwoods in The Republic of California.
Posts: 4,848
Garage
Here is an article that states "Trey McFarland, the sales/marketing manager of MAHLE Motorsport in Fletcher, North Carolina, says his company is bringing a new aluminum alloy, M142, to the performance aftermarket." dated 2015. https://theshopmag.com/features/choosing-right-pistons-rings
__________________
Gordon
___________________________________
'71 911 Coupe 3,0L outlawed
#56 PCA Redwood Region, GGR, NASA, Speed SF
Trackrash's Garage :: My Garage

Last edited by Trackrash; 08-29-2018 at 10:48 AM..
Old 08-27-2018, 09:08 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #65 (permalink)
Straight shooter
 
Lapkritis's Avatar
 
Join Date: Sep 2012
Location: Vilnius
Posts: 3,060
Garage
Pistons are as important as the builder. I cringe at the sharp edges on the dome when they're dropped in without fine finishing even with tbc regardless of manufacturer.

Sent from my SM-T580 using Tapatalk
__________________
“Of the value traps, the most widespread and pernicious is value rigidity. This is an inability to revalue what one sees because of commitment to previous values. In motorcycle maintenance, you MUST rediscover what you do as you go. Rigid values makes this impossible.”
― Robert M. Pirsig, Zen and the Art of Motorcycle Maintenance: An Inquiry Into Values
Old 08-29-2018, 09:14 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #66 (permalink)
formerly dug@project914
 
rennzeit's Avatar
 
Join Date: Dec 2001
Location: Mountain View, CA
Posts: 667
Quote:
Originally Posted by lvporschepilot View Post
I have not run the coated skirt but just make extra certain the wall clearances are indeed correct with the coating.
Don't blindly listen to random posts like the above. Read the information you get with your pistons. The skirt coatings may be spec'd to not be included in the clearance measurement. Some manufacturers are even leaving a spot uncoated on the skirt where the measurement should take place.
__________________
1973 914-6 MetalCraft Racing C-Prod/TransAm/IMSA history
Old 09-01-2018, 02:15 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #67 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 11:37 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.