1. The site has been updated to the Xenforo platform for numerous reasons. If you find any bugs or problems, please post them here: Software Update
    Dismiss Notice

Jack's Information on Head Porting

Discussion in 'The Garage' started by Patches, Sep 19, 2011.

Tags:
  1. Patches

    Patches XS650 Junkie

    I know Jack has been hanging around the forum a little bit now and I have been looking over his info in the 650 garage. I am starting to get into head porting and experimenting a bit. A lot of his info is written down and described pretty well, but all of the pictures are missing. Also his info on basic head porting is missing too. Does anyone know if that info with pics is floating around here somewhere? Or has anyone saved it for future reference? He's a wealth of knowledge, and I think it would be good to see that info here as well.

    Jack- if you are reading this please feel free to chime in. :thumbsup:
     
  2. dwyatt

    dwyatt XS650 Addict

    Pretty sure they got purged from the host site. Damned shame, some good stuff there.
     
  3. justin

    justin XS Monger

    I thought i posted those here, all well here you go....


    Alrighty here are the pics. I do not have these in proper order most likely, These are pics of the INTAKE ports...

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  4. justin

    justin XS Monger

    Here are the EXHAUST port pics....

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]
     
  5. justin

    justin XS Monger

    Thats all i have, match that up with THIS POST. Below are the flow numbers for the modified Vs. stock heads as ported, and a pic of the gentlemen responsible for all the hard work.


    [​IMG]

    [​IMG]
     
  6. The pictures show it all takes a little time but well worth it.
     
  7. Punkskalar

    Punkskalar Hugh's HandBuilt

    The best part, is that JACK just came by the shop this week :thumbsup: I've been looking up to his work for a good long while and it was nice to finally meet him in person.

    I'm gonna help him get his Long Rod engine together, and he's willing to help me work on a head for my latest engine :bike:

    Life is good over here at Hugh's HandBuilt
     
  8. Patches

    Patches XS650 Junkie

    Would this be the CR500 rods with XT pistons or GSXR pistons? 860cc or 880cc? Inquiring minds want to know..... :wink2::thumbsup:

    Gotta love Hugh. Just living an XS dream..... lol

    Edit:
    v scabber, I've been watching the same build. Those combustion chambers are crazy. He said that it just takes a bunch of mig welding and grinding. But after reading everything I'm still unsure what pistons they have decided to go with. Also, I don't remember how much or if they were raising the deck..... It's a long thread......
     
    Last edited: Sep 20, 2011
  9. Thats good to hear I've been watching that build a long time while he was working on the head and combustion chamber design. Keep us posted.
     
  10. Jack

    Jack XS650 Junkie

    First of all, Justin"THANK YOU"! for saving those porting photo's. I"m really not quite sure what happened over at Photo Buckets as I was trying to create a back-up photo file and cleaning out some old photo's and apparently I hit the wrong key:banghead:I'm a real klutz when it comes to computers:doh:

    Patch, What is that you wanna know on the experiments? All the basic porting info is in the extreme section.
     
  11. Jack

    Jack XS650 Junkie

    Just want everyone here to know,Hugh has got it happening over at Hughs HandBuild.com:thumbsup: Bobbers on lifts,motors being built( One is for an editor of some motorcycle magazine,I believe ) ,packages waiting to be shipped and big boobed babes wanting to ride his XS:D.Wow! I need to wake up:laugh:
    This young gentleman who's definitely blessed with motorcycle passion has a very bright future ahead of him and I glad to have met him.
     
  12. Jack

    Jack XS650 Junkie

    The piston choices will depend on how the second flow test fairs after mods to up the gains in the 200 to 300 lift range. Piston choices are narrowed down to the KZ1100 or GSXR 1150 piston. Deck height with GSXR pistons is negative the thickness of base gasket and deck height with KZs is positive.020 with base gasket.
     
    Last edited: Sep 20, 2011
  13. Patches

    Patches XS650 Junkie

    Justin-

    Thank you again for saving those photos. I have already saved them on my hard drive and plan on putting something together with Jack's info (that is if that's ok with you, Jack).

    I believe that you can bolt on all the 750 kits you want but if you don't get these heads flowing properly you are wasting some serious potential.

    Jack-

    What displacement are you shooting for? Also are you swapping to the CR con rods or just going with 256 rods and new sleeves/pistons? There looks to be some considerable weight savings with the GSXR pistons if I recall correctly.

    I have several XS motors laying around at this point in time. One is a XS1 that was seized and since then I have gotten touch with Gary Hoos. For the motor we have put together the following forma very mild build:

    JE 700cc kit with no base gasket running aprox 10.5:1 compression (9.5:1 w/ base gasket)
    Performance aluminum top valve spring kit
    Shell #1 cam
    Lectron Carbs
    Intake runners
    Sparx charging system (to reduce rotational mass)
    Boyer or Pamco Ignition
    (every part weighed and balanced on a very precise digital scale (down to 1/10 grain)

    I also plan on doing a 750 and hopefully 860-880cc motor once I get all of the research done. I'm really looking into the CR500 connecting rod swap but I'm a bit concerned if the head is going to be able to keep up. The thread in XS650 garage is great, but I need to sit down with a pencil and paper to keep all of the info straight (the math can get a little crazy) and dedicate about 2 hours to getting it all re-read and figured out.
     
  14. justin

    justin XS Monger

    Not problem sir! I actually have them hosted on my website, i PMed you over on 650garage with all the information to link to them in your post about a year ago. Ill leave them on indefinitely. feel free to use the links or whatever, there yours after all lol. Likewise if you ever want them removed just say the word.

    And THANK YOU! for all the great information and work.
     
  15. Jack

    Jack XS650 Junkie

    One of the strongest points of going L/R is flow requirements aren't of strict importance as velocity becomes due to pumping loses from tdc to mid stroke. The XS head from a flow perspective is truly more suited for the L/R as the ports don't have to work as hard allowing some flexibility in altering the ports shape to enhance velocity . here's an poring article and as your reading it,envision it's referring to the XS head. The XS head responds quite nicely with positive gains when the port volumes are reduced.
    Patch,I just reviewed this response,it's all screwed up,read carefully between each paragraph:doh:

    http://sr500forum.bravehost.com/sr500ehopup.html
     
    Last edited: Sep 21, 2011
  16. Patches

    Patches XS650 Junkie

    Ok, so I read the article. Good read, some interesting stuff. I must say that it was a little disappointing to get all the way to the end and not see any dyno results....:doh:

    I was surprised to see that they raised the floor 7mm. Unfortunately very,very few of us have a flow bench to our disposal..... Not to mention the time to conduct 600 flow tests:yikes: I think this is where we need to find a happy medium with proven results. Kinda the KISS method for porting the XS head. It seems that for the general XS motor builder there are a couple basic things that can be done with guaranteed positive results.

    On a side note I compared the ports on my XS1 head to a later model head (81 I thinks) and I must say that the XS1 seemed to have a slightly higher quality or casting with less jagged edges and better fit/finish. Maybe it's just a coincidence... because like it has been said before not all castings are the same and not all XS heads will flow the same.

    None the less, I'm going to keep up the research and see what all can be learner.

    Jack- if you get a chance please keep us up to date on your motor build. I love reading about it. :thumbsup:
     
  17. Jack

    Jack XS650 Junkie

    The XS1 ports were designed for the usage of the 256 rod,higher velocity with no flow loses in comparison to the later model heads that I've had flowed but the XS1 ports are far more consistent in flow casting of the intake port than exhaust and it's this casting efficiency in the XS1 intake ports that gives dead near equal flow #s when flow comparing different XS1 heads. They loose a little flow at .300 lift but more than make up for this lose around .350 lift. And if you want that intake port to move some serious air,along with pumping up velocity, D Shape the intake port,raise the floor 2mms,lay the short turn way back for that gentle radius,streamline the guide boss,install a thick margin intake valve and this head will hang with the best of them on the bench or on the street,etc. That head is tops in my book.
    Later and Good luck on your projects and if you by any chance ever want to sell a matching XS1 compo,drop me a line.
     
    Last edited: Sep 22, 2011
  18. Patches

    Patches XS650 Junkie

    Jack-

    I actually have a spare XS1 head and rocker box. It may need some work. I haven't pulled the valves to take a look at the sealing surfaces yet. Maybe we can work something out.
    It's been a long day, but I'll drop you a PM tomorrow.

    Also, I've met a guy that has some flat track friends that have built many successful CR500 con rod XS motors. Once we all get time we plan to get together and compare notes and swap some info.
     
  19. Jack

    Jack XS650 Junkie

    Bring that meeting to North Carolina so I can attend too:laugh: That's gonna be a fun meeting for sure sharing ideas and tricks,that's what it's all about. Can't wait to hear what their using for pistons,compression height should be 1.000 or slightly less. Take notes,take notes ,take notes:)
     
  20. sodslinger

    sodslinger XS650 Member

    Any possibility someone might have these pics still available?
     

Share This Page