E90Post
 


 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > N55 exhaust cam rockers in N52



Reply
 
Thread Tools Search this Thread
      09-07-2021, 03:00 PM   #1
MWC
New Member
4
Rep
8
Posts

Drives: E36 M3 Race car, 997.2 C2s
Join Date: Jul 2021
Location: CT

iTrader: (0)

N55 exhaust cam rockers in N52

Has anyone tried this yet? I'm looking into options for making some more power when I put my engine together and I found some speculation on whether this will increase valve lift but I couldn't find anything concrete.

Anyone know for sure if the N55 exhaust rockers will swap into an N52?

Also how about a 3.2 liter stroker with an N55 crank ?? JK lets take one step at a time here...
Appreciate 2
Biginboca3759.50
bcmfla10.50
      09-07-2021, 03:16 PM   #2
neilvan
Major
neilvan's Avatar
Canada
858
Rep
1,359
Posts

Drives: 09 E90 335i M-Sport 6MT RWD
Join Date: Nov 2017
Location: Ontario, Canada

iTrader: (0)

Garage List
The theory was yes it will; and it would be similarly close to the MILVS on the intake. I remember reading a thread where the math worked out

No one has tried it yet though as you gotta pull the cam out and all the stuff to go with it (plus the timing blocks). If you are rebuilding I 100% would put a set in.
Appreciate 1
bcmfla10.50
      09-07-2021, 03:35 PM   #3
Biginboca
Colonel
Biginboca's Avatar
3760
Rep
2,738
Posts

Drives: 2009 E92 328i 6MT
Join Date: Jun 2017
Location: Boynton Beach, FL... USA

iTrader: (3)

I sent some N55 rollers off to hassmaschine for him to compare with n52 rollers on a head he had that was disassembled. He was going to take some measurements but seems to have gone MIA and hasn’t responded to my PM’s for several months now.

So if anyone was waiting on the result of that I would say move forward in your own. I would really like to know if this is worth pursuing.
Appreciate 2
bcmfla10.50
tetsuo1111224.00
      09-15-2021, 10:55 AM   #4
hassmaschine
Major General
United_States
3940
Rep
7,216
Posts

Drives: "NBO" 330i
Join Date: Jun 2014
Location: earth

iTrader: (0)

Sorry man, I have just not had a lot of free time. I've been away every nearly weekend since the end of June. I still intend on taking measurements as soon as I am able - I think there is potential there.
Appreciate 2
ornicar133.00
Biginboca3759.50
      09-15-2021, 11:52 AM   #5
Biginboca
Colonel
Biginboca's Avatar
3760
Rep
2,738
Posts

Drives: 2009 E92 328i 6MT
Join Date: Jun 2017
Location: Boynton Beach, FL... USA

iTrader: (3)

Quote:
Originally Posted by hassmaschine View Post
Sorry man, I have just not had a lot of free time. I've been away every nearly weekend since the end of June. I still intend on taking measurements as soon as I am able - I think there is potential there.
Awesome, can’t wait to see if this is worthwhile! I’m still trying to figure out how to get some s54 headers under my hood too lol
Appreciate 0
      09-15-2021, 11:55 AM   #6
hassmaschine
Major General
United_States
3940
Rep
7,216
Posts

Drives: "NBO" 330i
Join Date: Jun 2014
Location: earth

iTrader: (0)

Quote:
Originally Posted by Biginboca View Post
Awesome, can’t wait to see if this is worthwhile! I’m still trying to figure out how to get some s54 headers under my hood too lol
My buddies made the flanges. I'm sure they could get another set cut for you. I'd like to know what they used for the tubes that pressed into the flanges.. and pick up a set of S54 headers before they're impossible to find.
Appreciate 0
      09-15-2021, 04:53 PM   #7
AmuroRay
Brigadier General
AmuroRay's Avatar
2165
Rep
4,073
Posts

Drives: M235i
Join Date: Aug 2019
Location: Florida

iTrader: (0)

You all know me, but you don't know me...let's leave it at that. But I have a set of MILVS I've been meaning to install, curious to see how putting the exhaust cam in the better flowing N52 head works out.
__________________
Mods: Yes.
Appreciate 1
Biginboca3759.50
      09-15-2021, 11:52 PM   #8
hassmaschine
Major General
United_States
3940
Rep
7,216
Posts

Drives: "NBO" 330i
Join Date: Jun 2014
Location: earth

iTrader: (0)

Exhaust cam? You don't want the turbo exhaust cams. less lift and duration, the profile is designed to spool a turbo, not for exhaust gas scavenging. If the bigger rocker ratio works, that's the way to go IMO.
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

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



All times are GMT -5. The time now is 02:57 AM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST