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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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jan 8, 2011]
    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
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    dany2k Member

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    [Jan 8, 2011]
    impressive guide andrew, thanks for taking the time to write it up.
    #42
  3. s3gazz
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    s3gazz Well-Known Member

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    [Jan 8, 2011]
    hi andrew what mods would i need to to have this done mate so it runs perfect

    cheers
    #43
  4. harryc
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    harryc Member

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    [Jan 8, 2011]
    Looks good, do you know what the flow figures 'before' were or a % increase in flow?
    #44
  5. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jan 8, 2011]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jan 8, 2011]
    I think its about 20% more on the exhaust side and less for the inlet
    #46
  7. harryc
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    harryc Member

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    [Jan 8, 2011]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jan 8, 2011]
    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
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    s3gazz Well-Known Member

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    [Jan 8, 2011]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Jan 8, 2011]
    Send me the head and i'll do all the work on it
    #50
  11. StaceyS3
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    StaceyS3 Well-Known Member

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    [Jul 27, 2012]
    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
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    jamieA3 Member

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    [Jul 27, 2012]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Dec 31, 2012]
    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
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    brasiliangringo Member

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    [Dec 31, 2012]
    Go write up although id probably pay an expert like the OP to do this for me !!
    #54
  15. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Dec 31, 2012]
    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
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    superkarl MAN OF STEEL

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    [Dec 31, 2012]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Dec 31, 2012]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Feb 12, 2013]
    Just redone my own head due to unfortunate cam breakage

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    #58
  19. Dani_B19
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    Dani_B19 Audi-sports own special child.

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    [Feb 12, 2013]
    Cant believe thats the mess of a head i gave you mate haha, top work.
    #59
    Benjiman46 likes this.
  20. <tuffty/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Feb 12, 2013]
    Nice work dude...

    <tuffty/>
    #60
  21. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Feb 12, 2013]
    Just got to get it off to my mates to get the guides done
    #61
  22. Benjiman46
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    Benjiman46 R-Tech Terrorist

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    [Feb 13, 2013]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Feb 13, 2013]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Feb 27, 2013]
    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/>
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    <tuffty/> Badger 5 Edition Staff Member Moderator

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    [Feb 27, 2013]
    I need to re-read this again I think... I might look at doing my exhaust ports

    <tuffty/>
    #65
  26. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Feb 27, 2013]
    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
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    mikem1 Golf with BAM Engine

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    [Feb 27, 2013]
    Very interesting, email sent.

    Mike
    #67
  28. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Feb 27, 2013]
    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
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    mikem1 Golf with BAM Engine

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    [Feb 28, 2013]
    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
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Feb 28, 2013]
    Yes its a A3
    #70
  31. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Feb 28, 2013]
    Got some 2.7 RS4 heads in to do now
    #71
  32. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Apr 9, 2013]
    Finished another ST170 head

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

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    [Apr 9, 2013]
    Great work!
    #73
  34. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Apr 10, 2013]
    Thank you
    #74
  35. Andrew@A.L.D
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    Andrew@A.L.D May add NOS to 600+bhp?

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    [Apr 27, 2013]
    Been busy again with another ST head

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    #75

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