1996 E36 316i compact exhaust ports-boring out?

Notices
 

Thread: 1996 E36 316i compact exhaust ports-boring out?

Reply to Thread
Results 1 to 4 of 4
  1. 1996 E36 316i compact exhaust ports-boring out? 
    #1
    BMW Master
    Car Details
    m43ell's Car Details
    Model of Car:
    325 tds
    Year of Manufacture:
    1994
    Transmission Type:
    manual
    Car Body Type:
    saloon
    m43ell's Avatar
    Join Date
    Apr 2010
    Location
    gloucester
    Posts
    294
    Thanks
    86
    Thanked 95 Times in 74 Posts
    upon taking the manifold off to repair a blow, i noticed that the exhaust ports were like half round half square, theres quite a bit of metal to be removed to make it a full circle, is this worth doing and would i get any gains from it or would it reduce pressure to much as the holes are now bigger? im replacing the head gasket any way so i thought i would just generally polish a replace any worn parts on the head whilst its off, thanks
     
     

  2. Remove Advertisements
    BimmerForums.co.uk
    Advertisements
     

  3.  
    #2
    BMW Guru
    Car Details
    mark@vorny.co.uk's Car Details
    Model of Car:
    911 C2S
    Year of Manufacture:
    2009
    Transmission Type:
    Automatic
    Car Body Type:
    Coupe
    mark@vorny.co.uk's Avatar
    Join Date
    Sep 2008
    Location
    Appleby Magna, Derbyshire
    Posts
    6,636
    Thanks
    5,139
    Thanked 3,738 Times in 2,697 Posts
    Can anybody offer the OP any help on this ?
    2013, Porsche 911 Carrera 4S, PDK, Sports Exhaust, Chrono, etc, etc

    *removed

    BFUK weekday crew

    PLEASE READ THE POSTING RULES & HOW TO CORRECT THREAD TITLES & THE SELLING RULES
     
     

  4.  
    #3
    BMW Guru
    Car Details
    dazza316i's Car Details
    Model of Car:
    316i compact
    Year of Manufacture:
    1996
    Transmission Type:
    manual
    Car Body Type:
    hatchback
    dazza316i's Avatar
    Join Date
    Dec 2009
    Location
    bognor regis west sussex
    Posts
    1,659
    Thanks
    663
    Thanked 580 Times in 532 Posts
    you should see some benefit but be carefull make sure you clean all swarf and dust of the head before refitting good luck
     
     

  5. Remove Advertisements
    BimmerForums.co.uk
    Advertisements
     

  6.  
    #4
    BMW Master
    Car Details
    318i's Car Details
    Model of Car:
    318i
    Year of Manufacture:
    1994 and only 50k
    Transmission Type:
    Manual
    Car Body Type:
    Saloon
    318i's Avatar
    Join Date
    Feb 2009
    Location
    Hampshire
    Posts
    438
    Thanks
    38
    Thanked 79 Times in 69 Posts
    if the exhaust manifold is the same square-ish shape then you wont see a difference.
    if the exhaust manifold holes are round and bigger than the exhaust ports then you may see a difference, good or bad.

    dont forget bmw didnt just throw the cars together. my guess is the exhaust manifold ports are the same shape as the exhaust ports. bmw spends millions in r&d.
     
     

Tags for this Thread

View Tag Cloud

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