318ti.org forum

Go Back   318ti.org forum > Technical, Maintenance and Modifications > Engine

Notices

Engine Tuneups, chips, wires, spark plugs.

.
» Recent Threads
M52 Swap Questions
07-01-2018 05:06 PM
Last post by Kglenn328
Today 02:38 AM
16 Replies, 1,391 Views
What model ti do you own?
02-26-2003 03:40 AM
Last post by 3DGE
Today 02:35 AM
322 Replies, 104,763 Views
Happy Birthday 30yrMbr
Yesterday 05:00 AM
Last post by 1996 328ti
Yesterday 05:00 AM
0 Replies, 127 Views
Will M3 parts fit a 96...
04-04-2007 05:27 AM
Last post by 3DGE
Yesterday 03:25 AM
15 Replies, 2,052 Views
AutoCross Checklist (FAQ)
08-24-2006 04:39 PM
Last post by weste46
08-14-2018 03:17 PM
9 Replies, 16,963 Views
File this under: "You're...
06-12-2018 07:23 PM
Last post by weste46
08-14-2018 03:10 PM
3 Replies, 737 Views
Expanding Our BMW Family
08-14-2018 03:01 PM
Last post by weste46
08-14-2018 03:01 PM
0 Replies, 103 Views
finally got a ti
08-14-2018 07:11 AM
Last post by Kilomattox
08-14-2018 07:11 AM
0 Replies, 150 Views
Clutch Hydraulics
08-08-2018 04:58 AM
Last post by Garnet
08-13-2018 11:22 PM
3 Replies, 759 Views
Wtb: ac compressor for...
08-13-2018 09:10 PM
Last post by Uneeqinc
08-13-2018 09:34 PM
1 Replies, 126 Views
Reply Share/Bookmark
 
Thread Tools Display Modes
Old 07-26-2018, 07:17 PM   #1
AFDanHef
Junior Member
 
Join Date: Mar 2017
Location: Riverside, CA
Posts: 21
iTrader: (0)
Question S52 Cams w/ M52 Valve Springs??

Who all is running S52 cams in their M52 motor?? What valve springs are you using??

I recently read that the S52 uses different (stronger) valve springs because it revs higher and the cam has more lift/duration. That made since to me so I researched a little and according to Realoem.com, the S52 valve spring part number is not used in any m52s except for the E39 528i, which I could assume has a more aggressive cam because it's a 5 series that needs more power. The S52 valve springs are also used in just about every M42/44 engine made. I could assume that the 4 cylinder motors use the stronger springs because they rev higher.

All this said ... Will the stock M52 valve springs hold up under S52 camshafts?? I'm rebuilding my M52 right now, using S52 cams and I would HATE to swallow a valve because I broke a spring!! Also, valve springs are $15 each!!!!! $15x24=$360!!!!!

I did NOT expect them to be so expensive!!!! .... Sooooo let me know if this is the worst idea in the world ... buuuttt I was thinking since the S52 springs are the same as the M44s ... I could go pull 24 of them from the junkyard?? Is that a horrible idea??
AFDanHef is offline   Reply With Quote
Old 07-27-2018, 04:33 AM   #2
EFoss28
Junior Member
 
Join Date: Jul 2018
Location: FW, TX
Posts: 1
iTrader: (0)
Default

Most people do not swap the valve springs when doing the cam swap. I think it is a good idea to swap as the S52 spring is a little stiffer, but also a little bit shorter. You could be more prone to valve interference if you miss a shift or over-rev if you use the M52 springs. All of my experience is from a M52 race car that I rent to customers and I have a lot of experience with bent valves from them over revving the engine. I might suggest this kit as your best option if you decide to buy springs (I use it on my current race engine and have no issues). https://thmotorsports.com/538202-sup...-retainer-kits
EFoss28 is offline   Reply With Quote
Reply

Bookmarks

Tags
m50 , m52 , s52 cams , valve springs


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Aftermarket Springs with an m52 DunkM Engine Swaps 1 08-27-2014 04:45 AM
S52 Swap, need help with fuel pressure and 3/2 valve dylanreid16 Engine Swaps 1 12-08-2011 05:00 PM
SAP (Secondary Air Pump) Repairs cali-ti Knowledge Base 5 01-23-2010 10:10 PM
M52 Cams question Alexandre VTS Engine 3 01-24-2008 10:37 PM
BMP Cams and valve springs? 1rstbmw! Engine 1 01-10-2006 03:05 PM


All times are GMT +1. The time now is 02:57 AM.


.
Powered by site supporters
vBulletin Version 3.8.8
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Copyright ©1999 - 2018, 318ti.org
© vBadvanced CMPS v3.2.2
[page compression: 70.93 k/81.49 k (12.95%)]

318ti.org does not warrant or assume any legal liability or responsibility for the accuracy, completeness, or usefulness of any information or products discussed.