Stroking an S50B30 95 M3 motor - BMW Forum - BimmerWerkz.com
M-Series (M1, M3, M5, M6) General M-Series Discussion - If it does not fit into a more specific M Category above, please place it in here. In addition, previously archived M-Series discussion is located in this section.

 
LinkBack Thread Tools Display Modes
#1 (permalink) Old 10-01-2005, 11:21 PM
1st Gear Member
 
BMWjesterFAN's Avatar
 
Join Date: Dec 2004
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BMWjesterFAN is an unknown quantity at this point
(Thread Starter)
Stroking an S50B30 95 M3 motor

Anyone know where I can find info on stroking a 3.0 S50 engine? I'm looking to make some decent power NA, and then possibly go with a supercharger, but I don't want to be like everyone else and just throw a Vortech on it and call it a day. I am tearing the motor down now, and will have the head ported, polished, and decked, and a valve job done, along with the block being acid dipped and both being inspected. Where should I go from there? Keep in mind that I am not rich, and will do as much of the work as I can myself. I rebuild internal combustion engines on aircraft in the Air Force, so I think I can handle the assembly stuff, and some minor engine work. Thanks,
-Tim
BMWjesterFAN is offline  
Sponsored Links
Advertisement
 
#2 (permalink) Old 10-08-2005, 11:56 PM
1st Gear Member
 
BMWjesterFAN's Avatar
 
Join Date: Dec 2004
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BMWjesterFAN is an unknown quantity at this point
(Thread Starter)
I have a new idea. Well, not new, just modified. According to BMW factory specs, I can overbore the block from my S50 to take S52 piston sizes. I could then us an S52 crank and Wiseco forged S52 pistons. In particular, they have a set of 13:1 compression pistons. Stroked and bored to basically a 3.2, plus the 13:1 pistons, OBD1 harness from my S50, head work (port, polish, valve job, decked), maybe some sunbelt cams (heard they are a bit more aggressive than schrick), underdrive pulleys (have 'em from Turner MS already). What do you guys think? I know I would have to run high octane gas, but any ideas on how much power I may be able to make? Oh, and since I am going to Korea for a year, I will be saving up for the TEC3, AEM, or another stand-alone EMS. Opinions? Help? Naysayers?
-Tim
BMWjesterFAN is offline  
#3 (permalink) Old 10-10-2005, 05:54 PM
Keep it Copacetic
 
///M Power's Avatar
 
Join Date: Feb 2004
Location: St. Louis, MO ||| Los Angeles, CA
Posts: 9,481
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute ///M Power has a reputation beyond repute
Send a message via AIM to ///M Power
Sounds expensive.


1995 BMW M3 Turbo - Dakar/Black
///M Power is offline  
#4 (permalink) Old 10-10-2005, 07:35 PM
Teh Peetsa Gai
 
ldsbeaker's Avatar
 
Join Date: Apr 2004
Location: Havelock, NC
Posts: 3,478
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute ldsbeaker has a reputation beyond repute
13 to 1 compression? sounds a bit high. You will DEFINITELY need to run high octane fuel. If you're going to put the s/c on, you might as well keep the compression down to a reasonable level. Otherwise, you're acid treated block and gold plated components will go boom.

'86 325es (TURTL3): PJ peetsa hawler
'87 535is (BADWATER): almost done... really.
'86 325e (GRN HLL): DD/show/rocket
'04 x3 3.0i: Wife's Bimmer (manual, woot!)
My BMW Blog
ldsbeaker is offline  
#5 (permalink) Old 10-12-2005, 12:02 AM
1st Gear Member
 
BMWjesterFAN's Avatar
 
Join Date: Dec 2004
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
BMWjesterFAN is an unknown quantity at this point
(Thread Starter)
Well, I would definitely run really high octane, probably race gas. And this would be for NA power. I would drop in some stock or dished pistons when I slap the blower on. Already got the machine shop lined up for the work, just need to get a good set of pistons so they can bore and hone the cylinders to match the individual pistons.
BMWjesterFAN is offline  
Sponsored Links
Advertisement
 
Reply

  BMW Forum - BimmerWerkz.com > BMW Model Specific Forums > M-Series (M1, M3, M5, M6)


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
User Tag List

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Blower Motor Chirp Fixed jnash 3-Series (E46, E90) 2 07-07-2009 10:41 AM
Stroking a 95 M3 S50B30 engine and other mods BMWjesterFAN 3-Series (E36) 6 10-04-2005 03:54 AM
Lost 2 Blades On The Motor Fan just_program 3-Series (E36) 11 11-27-2004 11:07 PM

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome