» Site Navigation | | » Recent Threads | | 1999 M3 Swap 09-07-2023 10:10 PM 05-02-2024 08:18 PM 6 Replies, 405,518 Views | | | | | 11-25-2008, 07:49 AM | #1 | Senior Member Join Date: Aug 2005 Location: Southern Cal Posts: 113 | m42 pluses i was reading around other forums and i came across this write up.. is it true about the m42??! Forged crank stock Forged Rods stock 4 Valves per cylinder flows very well New combustion chamber designed to maximize squish and fuel mixing for a complete burn Integrated piston oil squirters (very beneficial for boosting, cools piston crown) Sodium Filled valves (once again dissapates heat, great for boosting) Strong iron block No timing belt to break Very well balanced and likes to rev are our valves really filled with sodium? __________________ | | | 11-25-2008, 03:23 PM | #3 | Senior Member Join Date: Aug 2005 Location: Florida Posts: 2,525 | I also did not think we have a forged crank stock... That is why people use the m47 diesel crank for high horsepower applications. The two weak points become the crank and the valve retainers. | | | 11-26-2008, 07:03 AM | #4 | Senior Member Join Date: Aug 2005 Location: Southern Cal Posts: 113 | deng... __________________ | | | 11-26-2008, 08:27 AM | #5 | Senior Member Join Date: Sep 2008 Location: Hawaii Kai Posts: 232 | We get the forged crank. | | | 11-26-2008, 04:31 PM | #6 | Senior Member Join Date: Apr 2006 Location: Oxford, Ohio Posts: 868 | Quote: Originally Posted by mohaughn I also did not think we have a forged crank stock... That is why people use the m47 diesel crank for high horsepower applications. The two weak points become the crank and the valve retainers. | The M47 crank has more stroke. That crank is used to get higher displacement | | | 12-09-2008, 12:48 AM | #7 | Senior Member Join Date: Oct 2008 Location: Los Angeles, CA Posts: 1,464 | Quote: Originally Posted by jbxblitz are our valves really filled with sodium? | Can't say for certain that the BMW valves are, but many automotive applications use liquid sodium metal in the valves for cooling/transfer of heat away from the valve face. LSM is also used in certain nuclear reactor designs as a cooling fluid! | | | 12-09-2008, 12:51 AM | #8 | Senior Member Join Date: Apr 2006 Location: Oxford, Ohio Posts: 868 | Only the exhaust valves are soidum filled... yes it's true. | | | 12-09-2008, 03:01 AM | #9 | Senior Member Join Date: Nov 2006 Location: Orange County, NY Posts: 1,067 | The M42 crank is forged. I don't know about the rods though. __________________ McLaren F1 - BMW M Power S70/2 | | | | Currently Active Users Viewing This Thread: 1 (0 members and 1 guests) | | Posting Rules | You may not post new threads You may not post replies You may not post attachments You may not edit your posts HTML code is Off | | | |
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