1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

A small guide to doing basic cylinder head work ie porting/polish/gasflowed

Discussion in 'A3/S3 Forum (8L Chassis)' started by Andrew@A.L.D, May 27, 2010.

  1. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Yes i did

    @10in on .400 lift it made 155 cfm's on the inlet and 144 cfm on the exhaust

    Didn't go to .500 if i did it would of flowed more and the standard cams do lift that much anyway
    #41
  2. dany2k
    Offline

    dany2k Member

    Joined:
    Dec 7, 2010
    Messages:
    301
    Likes Received:
    0
    impressive guide andrew, thanks for taking the time to write it up.
    #42
  3. s3gazz
    Offline

    s3gazz Active Member

    Joined:
    Aug 11, 2010
    Messages:
    1,263
    Likes Received:
    1
    hi andrew what mods would i need to to have this done mate so it runs perfect

    cheers
    #43
  4. harryc
    Offline

    harryc Member

    Joined:
    Dec 23, 2010
    Messages:
    34
    Likes Received:
    0
    Looks good, do you know what the flow figures 'before' were or a % increase in flow?
    #44
  5. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Sorry i did look what it did before, Someone gave me flow figures of a well know cylinder head man

    I did my work on the head and strapped it to the flowbench and beat his figures

    s3gazz you may need a tweak of the map.
    #45
  6. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    I think its about 20% more on the exhaust side and less for the inlet
    #46
  7. harryc
    Offline

    harryc Member

    Joined:
    Dec 23, 2010
    Messages:
    34
    Likes Received:
    0
    Sorry for all the questions, did you get a chance to fit and test the head? never got round to dyno testing my head to see where the most gains (and or losses!) were. I could only judge by feel and increased top end performance. Id guess you would see quite healthy increases if the oem head is quite restrictive and boost picking up quicker.
    #47
  8. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Well i fitted the head to my engine, ( spec in my sig ) its on a standard map and standard injectors i pushed it one day and i know i shouldn't, running 13 psi of boost it shows 273 bhp on the liquid, never done it again as i've going BT and needs mapping
    #48
  9. s3gazz
    Offline

    s3gazz Active Member

    Joined:
    Aug 11, 2010
    Messages:
    1,263
    Likes Received:
    1
    soz again mate i dont make sence but what mods i need to got with the ported head
    cheers
    #49
  10. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Send me the head and i'll do all the work on it
    #50
  11. StaceyS3
    Offline

    StaceyS3 Active Member

    Joined:
    Dec 17, 2010
    Messages:
    2,108
    Likes Received:
    4
    Cant believe i haven't seen this thread before, looks like top quality work and as much as i'm pretty sure i could do mine (no where near as good as this) i think its something i'll leave to people that really know what they're doing ;)
    #51
  12. jamieA3
    Offline

    jamieA3 Member

    Joined:
    Jun 30, 2012
    Messages:
    150
    Likes Received:
    0
    very interesting read. you obviously have a huge amount of knowledge and expertise. just want to say thanks for sharing it!
    #52
  13. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Not been on this thread for some time now and noticed StaceyS3 reply

    StaceyS3 has one of my heads now.

    I've done some more work on head recently and having received a damaged ex JNL head that i've now cut up i've leant a lot more about the 20v head. Stacey's head is one of my new spec heads that i'm sure he will tell you about.
    #53
  14. brasiliangringo
    Offline

    brasiliangringo Member

    Joined:
    Mar 22, 2010
    Messages:
    574
    Likes Received:
    1
    Go write up although id probably pay an expert like the OP to do this for me !!
    #54
  15. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Thats why i did it as i have seen to many people mess them up but also try to give good advice so they don't mess them up
    #55
  16. superkarl
    Offline

    superkarl MAN OF STEEL

    Joined:
    Mar 28, 2010
    Messages:
    7,553
    Likes Received:
    19
    What are the differences now andrew? Do you have pics to illustrate it?
    Ive not started on mine yet, the heads only been cleaned so far. Need to get a move on really
    #56
  17. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Its something that can't really be show with illustrations, lots of measuring tools needed and you would need to be stood next to me for me to show you the different parts of the port thats been modified.
    #57
  18. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Just redone my own head due to unfortunate cam breakage

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    #58
  19. Dani_B19
    Offline

    Dani_B19 Audi-sports own special child.

    Joined:
    Nov 9, 2008
    Messages:
    7,270
    Likes Received:
    3
    Cant believe thats the mess of a head i gave you mate haha, top work.
    #59
    Benjiman46 likes this.
  20. <tuffty/>
    Offline

    <tuffty/> Badger 5 Edition Staff Member Moderator

    Joined:
    Sep 14, 2008
    Messages:
    15,727
    Likes Received:
    20
    Nice work dude...

    <tuffty/>
    #60
  21. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Just got to get it off to my mates to get the guides done
    #61
  22. Benjiman46
    Offline

    Benjiman46 R-Tech Terrorist

    Joined:
    Feb 6, 2012
    Messages:
    551
    Likes Received:
    2
    I would love to do something like this one day... Not necessarily to the S3... This sort of thing fascinates me haha
    #62
  23. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Thank you everyone

    I just hope it performs well when fitted as this is not the end and i do have more planned for her, this was just a set back to my plans.
    #63
  24. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Just done a big valve head for a 20vT

    Will see what that does on the flowbench now, this will be put on are CNC mill for deck cooling modification
    #64
    dre_S3 likes this.
  25. <tuffty/>
    Offline

    <tuffty/> Badger 5 Edition Staff Member Moderator

    Joined:
    Sep 14, 2008
    Messages:
    15,727
    Likes Received:
    20
    I need to re-read this again I think... I might look at doing my exhaust ports

    <tuffty/>
    #65
  26. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Get your manifold made up first with large ports and go from there but well worth it

    my manifold ports are the same size as the gasket so massive really, the hotside has also been ported
    #66
  27. mikem1
    Offline

    mikem1 Golf with BAM Engine

    Joined:
    Jan 26, 2011
    Messages:
    57
    Likes Received:
    0
    Very interesting, email sent.

    Mike
    #67
  28. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Got you mail


    will be looking into doing a small port head for someone that's want to see if a ported small port head will make a better drivable car rather than a his standard AGU head

    i can understand his thinking keeping air volosity high with a gtx3071 and a 10:1 compression . Very driveale if it all works out
    #68
  29. mikem1
    Offline

    mikem1 Golf with BAM Engine

    Joined:
    Jan 26, 2011
    Messages:
    57
    Likes Received:
    0
    Is that from the perspective of doing it on a 2WD car to see the driveability improvements as opposed to on a 4WD or purely on a small port head?

    Mike
    #69
  30. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Yes its a A3
    #70
  31. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Got some 2.7 RS4 heads in to do now
    #71
  32. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Finished another ST170 head

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]


    BTW the 20v head in the background has been sold, Massive spec also but didn't take any pictures of thats
    #72
  33. N8
    Offline

    N8 Kowalski Details

    Joined:
    Jul 4, 2007
    Messages:
    17,157
    Likes Received:
    5
    Great work!
    #73
  34. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Thank you
    #74
  35. Andrew@A.L.D
    Online

    Andrew@A.L.D Cylinder Head Master

    Joined:
    Jun 19, 2009
    Messages:
    3,504
    Likes Received:
    3
    Been busy again with another ST head

    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    [​IMG]
    #75

Share This Page