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  1. #1
    Established Member Two Rings Krmass25's Avatar
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    Aug 18 2013
    AZ Member #
    121279
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    AMERICA

    Thumbs up Smartest and most cost effective way to rebuild the tfsi head ?

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    After finding theres no leakdown or compression issues with my engine I'm satisfied with the stock bottom end for my k04 setup.

    That leaves only the top end to rebuild for big horsepower and reliability improvements.

    After researching IE top ends, Ebay rebuild kits and the options available it is looking like the cheapest option with the highest performance requires building a head yourself.

    The IE head is beautiful but expensive. You can't get any better for $3600 with Ferrea valves installed with alll custom components by hand but if driving on the street and if high quality can be had for -$1000 or more then it is worth it to go the cheaper route. Some people will never notice a difference with supertech valves vs. ferrea valves the cost is usually up to $500 + / - so going the cheaper route can be worth it when trying to rebuild the car. Five hundred dollars can go into a large suspension or other engine upgrade that would equal horse power and more reliability in another area rather than a marginal increase in valve rain components.


    I'd like to find out once and for all if one could technically remove the head. Do a hand port and polish and end up saving money while having a high quality head rebuild.

    I'm trying to lock down a complete parts list needed if doing the job yourself. From what I understand we need:

    Head

    16 valves
    16 valve guides
    16 valve seals
    16 valve springs / retainers
    16 sets of valve locks (32 pieces)

    Camshafts
    Camshaft bearings

    8 intake rockers
    8 intake lifters

    8 exhaust rocker / lifter assemblies

    ARP head bolts

    ARP cam girdle bolts

    various seals and gaskets



    Anything missing?


    Last edited by Krmass25; 04-15-2018 at 12:21 PM.

  2. #2
    Active Member Two Rings
    Join Date
    Jan 03 2018
    AZ Member #
    411950
    Location
    South Carolina

    I don't think you will see any change over what you have now, unless you have changed you redline to 8k+. I say this because you said you are not experiencing any problem now (valve float), or plan on going to a higher lift/duration cam. You can check you valve springs compression rate most likely it will be in factory tolerances. You can get a higher compression rate spring or a small shim on the factory spring, but it will in turn put more pressure on the camshaft via the lifters (all being still stock). I run a head on my DSM with larger valves that are nitride coated, valve seats cut to match, CNC ported, with beehive springs. I only noticed a significant difference when I am running NOS in the 1/4 over a factory rebuilt head with just aftermarket springs (I shift at 8200). Yes there is a gain to be had but you can get that same 10th of a second or more by putting a set of forged wheels on the car, especially if you go down to 18s with a smaller circumference tire.
    2012 Oolong Grey A7 | EPL Stage 2 |
    1999 F150 DD Long bed
    1991 Mitsubishi 3000GT VR4 | 415 AWHP | < 100K |
    1990 Eagle Talon TSI | 670 AWHP | AKA "D Beast" |

  3. #3
    Established Member Two Rings Krmass25's Avatar
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    Aug 18 2013
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    121279
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    AMERICA

    I was thinking more along the lines of maintenance. To have no oil sneaking past the seals and while things are apart just take advantage of anything inexpensive worth doing. A port and polish can be close to the gains a cnc head has if done correctly and as far as the valve train goes wouldn't it be worth having it be all brand new and tight with superior valves, springs, titanium retainers etc? It definitely can't hurt anything .

  4. #4
    Veteran Member Four Rings aluthman's Avatar
    Join Date
    Mar 24 2013
    AZ Member #
    111961
    My Garage
    A7
    Location
    Griswold, CT

    A full Ferrea valvetrain can be had for ~$800 if you know how to buy it. It's unlikely that most people will be able to replace the guides themselves, but it's not impossible with the correct tools. You can absolutely benefit from a hand port/polish if it is done correctly. I've built a few of these heads now but have yet to try my hand at porting and polishing.
    -Adam

    '07 DTM A4 2.0T|6MT|EFR 7163 Twin Scroll|DoTuning|Built Motor|Meth and other go fast stuff…
    '06 A4 2.0T Quattro - RIP (Best ¼ mile pass 13.634 @ 103.30)

  5. #5
    Established Member Two Rings Krmass25's Avatar
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    Aug 18 2013
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    Quote Originally Posted by aluthman View Post
    A full Ferrea valvetrain can be had for ~$800 if you know how to buy it. It's unlikely that most people will be able to replace the guides themselves, but it's not impossible with the correct tools. You can absolutely benefit from a hand port/polish if it is done correctly. I've built a few of these heads now but have yet to try my hand at porting and polishing.
    Care to point me in the right direction?

  6. #6
    Veteran Member Four Rings aluthman's Avatar
    Join Date
    Mar 24 2013
    AZ Member #
    111961
    My Garage
    A7
    Location
    Griswold, CT

    Quote Originally Posted by Krmass25 View Post
    Care to point me in the right direction?
    Know anyone on active duty or a veteran? Ferrea offers a 40% military discount on their website.
    -Adam

    '07 DTM A4 2.0T|6MT|EFR 7163 Twin Scroll|DoTuning|Built Motor|Meth and other go fast stuff…
    '06 A4 2.0T Quattro - RIP (Best ¼ mile pass 13.634 @ 103.30)

  7. #7
    Established Member Two Rings Krmass25's Avatar
    Join Date
    Aug 18 2013
    AZ Member #
    121279
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    AMERICA

    as a matter of fact yes. Wow Good observation and tip sir



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