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  • #16
    Re: Oldeskewltoy's Headshop....

    Before and after.... All views are upside down....


    manifold, port, bowls (#2) before any work is performed





    manifold, port, bowls (#3) after sizing, before finishing - note the port roof taper is smooth from throttle body mount to both bowls





    The port floors taper where it meets the manifold... before on top....



    After(still some finishing work required) on the bottom. I made the port floors taper less severe by moving it back about double its stock distance from the manifold mounting edge.






    Now, back to the ports of #2 and #3....



    The purple line shows the original taper on the left, and on the right you can see the new taper is about twice the depth... but note the port floor, where it turns to go to the valve (green line) is the SAME. The yellow box outlines the amount of material removed from the front roof of the port. Yet still inside the Toyota intake manifold gasket



    The manifold is now nearly finished




    More to come..... :mrgreen:
    Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

    Information = POWER

    Comment


    • #17
      Re: Oldeskewltoy's Headshop....

      Don't suppose you've ever done any work on a 22R-E head at all? :P

      Excellent thread though! I do enjoy seeing detailed threads on headwork.
      The kei
      The Celica

      Comment


      • #18
        Re: Oldeskewltoy's Headshop....

        Originally posted by ill-minded
        Don't suppose you've ever done any work on a 22R-E head at all? :P
        Not yet.... I do have half of an 8R head :shock: I might play around with when I get slow....


        Originally posted by ill-minded
        Excellent thread though! I do enjoy seeing detailed threads on headwork.
        Thanks...... Odd you bring it up... I realized today that I don't post these threads for self-congratulation.... I post these threads so I have a purpose to take photos of my work......


        Huh???

        What??

        You read that correctly... I wouldn't be nearly as good as I am... if I didn't take photos. Great example is this next view.....




        I took this photo after another 5+ hour session, this time after working intake port #2.... or so I thought "after"....


        Port 2 looks pretty good, but take a closer look... the roof (photo is upside down so "floor" in view) shows a bit more of the roof then either ports 3 or 4...

        Sure enough... port 2's roof is a bit too steep... which means the taper back to the base of the guide boss is incorrect



        So I went back and adjusted it...... :wink:

        I can't speak to you about other porters... but I find posting all of my work an important ingredient in the finished product.


        btw.... more to come.... :mrgreen:
        Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

        Information = POWER

        Comment


        • #19
          Re: Oldeskewltoy's Headshop....

          Originally posted by from another forum
          Neat pics, I don't think we went it to too much detail about head work though.

          I'm still collecting parts for my build
          Some people like to see... but as I alluded too, I like to see, and if I didn't make these posts... I seriously doubt I'd be as good as I am.



          3 down... one to go



          if you look carefully inside port 2, you can see where I adjusted the port roof for a more consistent taper.


          Here is a close up before and after of port 3, this time instead of a 2 panel... a sliding gif... to show the work on port 3




          and now port 4 in mid work...





          More to come.... :mrgreen:
          Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

          Information = POWER

          Comment


          • #20
            Re: Oldeskewltoy's Headshop....

            Originally posted by from another forum
            I thought the T3 adapter would have better fitment.
            My previous experience with a T3 adapter




            solution... slotted bolt holes with jackscrews




            Originally posted by from another forum
            Good call on the ports though. But wouldn't it be easier to use a 20V engine instead of welding in parts to the head and rebuilding a complete intake plenum?
            20V has problems of its own... and besides it is easy enough to make a 16V, especially a smallport, make similar power on similar specs .


            As far as welding and completely new custom manifold... I have yet to add any material to any head I've worked.

            I understand that Hasslegren adds (welds in) extra metal into the area of the stock injector ports, I know Loynings has figured out a way to significantly raise the ports with out welding. In both of these cases this is for professional racing, and so INVE$MENT is part of every last horsepower.

            The 4AGE is a GREAT example of INVE$MENT... when Toyota was running the series they needed 12,000 rpm to make "only" 240 hp. These days... they are making close to 270hp, and only twisting them to 10,000 rpm to do it! Now the investment to get to 270hp @ 10k was likely close to $1,000,000 :shock:



            Now back to work.... remember those short radius's - radii??




            How about a bit closer...


            #1...




            #2...




            #3...




            #4...





            More to come...... :mrgreen:
            Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

            Information = POWER

            Comment


            • #21
              Re: Oldeskewltoy's Headshop....

              The short radius's are done... and as can be assumed... so is the port roofs, and manifold...




              I move on to the chambers, and exhaust side next week.... :mrgreen:
              Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

              Information = POWER

              Comment


              • #22
                Re: Oldeskewltoy's Headshop....

                Originally posted by from another forum
                OST: I have a couple of inquiries relative to this entire thread? Specifically, 1.) how do you keep the set screws on the manifold from vibrating loose on a running engine?
                2.) What is an approximate cost for you to duplicate a 16V head just like the one in this post?
                3.) How many hours of labor does it require to duplicate if you do it.

                This post and your pics are outstanding!! You are to be commended for your prowess as a head porter/developer.
                1) Locktite 290



                2) It depends... Anywhere from $1000 and up... price depends on many things... some excluding my porting work*

                LIKE:

                Who is supplying the smallport head, and ITB adapter? (smallport heads are tough to come-by recently...)

                Is the head in basic usable condition? That means it has the cam caps w/ good journals, it has good valve guides, and good valve seats.

                Do you want OEM valves, OEM back cut valves, or aftermarket valves?

                You will need aftermarket valve springs to function w/ 9mm lift cams

                Do you want Toyota, or aftermarket valve seals?



                * - my current pricing for porting work on a 4AG 16V head -

                $600 (minimum service) to do the 16 bowls/seats, taper the valve guides, deshroud and balancing chamber volume, exhaust port re-taper, and polishing.
                $150 to blend the intake guide bosses and to re-taper port roof - largeport
                $175 to blend intake guide bosses, blend port walls, and re-taper port roof - smallport
                $100 for machining of the heads surface
                $80 for cam journal deburring and polishing, and overall deburring
                $80 for hand lapped valves
                $60 for re-assembly
                $60 to set valve clearances - your supplied camshaft, special order shims not included
                $80 to adjust T3 smallport/largeport adapter
                $140 to blend T3 ITB manifold for silvertop throttles
                $220 to blend T3 ITB manifold for blacktop throttle

                Loynings valve jobs - a few hundred to a few thousand


                3) Since it isn't finished yet, the best I can give you is a ballpark time estimate - 50 to 60 hours.


                Just a small detail for me... but so much easier on my client when it comes to assembly, and fitment... check out the injector port clearancing





                More to come..... :mrgreen:
                Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

                Information = POWER

                Comment


                • #23
                  Re: Oldeskewltoy's Headshop....

                  [quote=from another forum]
                  Originally posted by oldeskewltoy
                  Originally posted by "from another forum":2utxhirz
                  ..how do you keep the set screws on the manifold from vibrating loose on a running engine?
                  1) Locktite 290

                  We use about 20 different Loctite products in our aerospace assemblies. Callout for Loctite 242 seems more widely used in critical components.
                  .

                  So much to learn from OST builds.


                  I bow down to you sir m(_ _)m[/quote:2utxhirz]

                  NEVER bow to another.... you'll miss the performance :P

                  seriously... I've failed at SOOO many things in my life it isn't funny.. I eventually found something I'm good at... it only took 35 years for me to find it :shock: ... but thank you for the sentiment

                  I use the 290 for one reason... it is wicking.... (it seeps into the threads and then sets up) The 242, and other thread lockers don't have this capability. Why is wicking important to me... simple really... it allows for fine adjustment in the jackscrews, and once set, I don't have to remove them to apply thread locker...


                  Now as to how critical it is... it isn't that critical... for once the manifold is bolted tightly(14ft/#s) to the head the jack screws could (theoretically) come out and fall away, the manifold isn't going to move once tightened.




                  Now as to magic... watch these machining marks disappear.....


                  going....








                  gone!

                  More to come.... :mrgreen:
                  Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

                  Information = POWER

                  Comment


                  • #24
                    Re: Oldeskewltoy's Headshop....




                    More to come.... INDEED... :mrgreen:
                    Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

                    Information = POWER

                    Comment


                    • #25
                      Re: Oldeskewltoy's Headshop....

                      Originally posted by oldeskewltoy
                      Originally posted by bennyd
                      Beautiful work OST, I only have experience with cast V8 heads, a fair bit mind you, but admire your work with the far less forgiving little alloy heads.

                      What do you use as a filling agent when required to reduce port volume and aid Venturi effect? Or is that not a problem when dealing with these type of ports?

                      Cheers
                      Benny
                      Thank you.... ops:


                      So far... I've not yet had to fill anything..... So far :shock: There are a few compounds out there I know of, but I have yet to work a head that needs it.

                      About less forgiving... as well as filling.... another advantage to aluminum is you can weld in more material :tu:
                      You are welcome, deserving praise IMO

                      With cast heads I use a 2 part epoxy. Most of the time it's the floors that need raising, to aid with air speed and increase the length of the short radius, completely skipped my mind that you can weld in aluminium, derr :? That would certainly help if your bit took a bit too much out of the soft aluminium compared to the cast I work with.

                      Again, beautiful, smooth work :tu:

                      Cheers
                      Benny
                      Originally posted by GonzoRacer
                      All too often I say "I can build something nicer than that" and I'm looking at my own build log...
                      2 x N360 restoration projects

                      Comment


                      • #26
                        Re: Oldeskewltoy's Headshop....

                        Originally posted by bennyd
                        Most of the time it's the floors that need raising, to aid with air speed and increase the length of the short radius
                        The only head I've come across so far where that would have been an issue... was a Volvo 530 head. It was shelved after cracks between the valves.. BUT it had HORRIBLE short radii... intake and exhaust






                        #4 is basically finished... 1 down... 3 to go....






                        More to come..... :mrgreen:
                        Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

                        Information = POWER

                        Comment


                        • #27
                          Re: Oldeskewltoy's Headshop....

                          wow!

                          Recently the cylinder head of my 4age was worked, and wished it to look like the work you are doing! I really congratulate their dedication :evil: :tu:
                          Toyota Corolla 1988 AE92 sedan
                          Toyota Corolla 1981 TE72 2door
                          http://touge-enthusiast-world.tumblr.com/

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                          • #28
                            Re: Oldeskewltoy's Headshop....

                            Originally posted by errolae92
                            wow!

                            Recently the cylinder head of my 4age was worked, and wished it to look like the work you are doing! I really congratulate their dedication :evil: :tu:
                            I have clients from all over the world... if there is a next time... send me an email: oldeskewltoy@yahoo.com

                            Originally posted by from another forum
                            you live so far away :-) would loved to come see you work
                            I've had a few people ask... I've never worked a head while others are here... it might be too distracting... but with that said, I am thinking of setting up a webcam one of these days.... :shock:



                            port #3....



                            2 down... 2 to go..







                            to get the above 2 panel view I "stuff" the camera into the port... notice the view screen on the camera... note how there is no special lighting




                            More to come.... :mrgreen:
                            Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

                            Information = POWER

                            Comment


                            • #29
                              Re: Oldeskewltoy's Headshop....

                              Originally posted by from another forum
                              Originally posted by oldeskewltoy
                              I am thinking of setting up a webcam one of these days.... :shock:
                              I might be able to help you with that. If you setup a camera to take a picture every 10 second, your 50 hours of work can be made into a movie of about 12 minutes

                              Hmmmm... that would be pretty cool.... I'll get back in touch....


                              Not quite a movie... but...... here is port 2...




                              More to come.... :mrgreen:
                              Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

                              Information = POWER

                              Comment


                              • #30
                                Re: Oldeskewltoy's Headshop....

                                Originally posted by from another forum
                                Those ports look spectacular OST! Great headwork.

                                thanks... the previous "movie" seems like it worked.... so here's another.... and a trusty 2 panel

                                Port #1 from stock to not.... :shock:






                                And with # 1 now finished... here are all four... before and after





                                More to come.... :mrgreen:
                                Cylinder head porting specialist - http://japanesenostalgiccar.com/foru...hp?f=1&t=24099

                                Information = POWER

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