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  • Head work advice needed

    Evening all,

    I'm about to take the head off the Cossie as I've been advised the head gasket is on its way out with a hydrocarbon test.

    The head in question is a small turbo head and the only thing to my knowledge that's uprated is a AB07 inlet cam that I had installed at SCS.

    Now then, while the heads off and will need a skim, is it worth having it ported, polished or any other mods done to it?

    Bearing in mind I'm not chasing numbers as the car is a handful as it is. I'm just wondering if having some light head work will make the engine run a bit more efficiently?

    Love to hear advise on this

    Cheers Billy


    Follow me on Instagram @billy_rs

  • #2
    Ported correctly will be a benefit but it will need a remap, Are you after more power.

    Mark

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    • #3
      I use nms, in my exp and what I've listened to and read,engine will consume the air quicker,and just as important is it to exit. Aswell, so both need opening up so I'd say yes to make the best of the cam you have,but weather it's worth it for money/power/response compromise I'd say call a specialist,my car when I was running motor in on t34 had similar cams to yours was mental with the head work but did seem to run turbo out of boost early at 6500 weather that was head work or not I

      Comment


      • #4
        Originally posted by DAI COSSY View Post
        I use nms, in my exp and what I've listened to and read,engine will consume the air quicker,and just as important is it to exit. Aswell, so both need opening up so I'd say yes to make the best of the cam you have,but weather it's worth it for money/power/response compromise I'd say call a specialist,my car when I was running motor in on t34 had similar cams to yours was mental with the head work but did seem to run turbo out of boost early at 6500 weather that was head work or not I
        As the above man says

        Comment


        • #5
          Originally posted by mark shead View Post
          Ported correctly will be a benefit but it will need a remap, Are you after more power.

          Mark
          So what does portrd correctly mean Mark?

          Are we talking the size of the ports or the way they are ported?


          Follow me on Instagram @billy_rs

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          • #6
            Originally posted by DAI COSSY View Post
            I use nms, in my exp and what I've listened to and read,engine will consume the air quicker,and just as important is it to exit. Aswell, so both need opening up so I'd say yes to make the best of the cam you have,but weather it's worth it for money/power/response compromise I'd say call a specialist,my car when I was running motor in on t34 had similar cams to yours was mental with the head work but did seem to run turbo out of boost early at 6500 weather that was head work or not I
            Can you remember what head work you had done exactly?


            Follow me on Instagram @billy_rs

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            • #7
              Originally posted by Billy_RS View Post
              So what does portrd correctly mean Mark?

              Are we talking the size of the ports or the way they are ported?
              Port sizes/flow for a given engine spec is important.

              Mark

              Comment


              • #8
                Originally posted by Billy_RS View Post
                Can you remember what head work you had done exactly?
                My spec sheet says
                25.5mm ports 3angle valve seats etc,
                But the engine is Karl's regular 500bhp version In my 3dr so as said speak to a tuner/builder for exact info I honestly couldn't tell you what suits your motor
                I only ran the t34 to run in for couple of thousand miles over a year ready for bigger turbo when I had

                Comment


                • #9
                  Originally posted by DAI COSSY View Post
                  My spec sheet says
                  25.5mm ports 3angle valve seats etc,
                  But the engine is Karl's regular 500bhp version In my 3dr so as said speak to a tuner/builder for exact info I honestly couldn't tell you what suits your motor
                  I only ran the t34 to run in for couple of thousand miles over a year ready for bigger turbo when I had
                  Fair enough mate, just wondering if it's worth doing while the heads off. I'll speak to Harvey and see what he says then.

                  Thanks for the help


                  Follow me on Instagram @billy_rs

                  Comment


                  • #10
                    Originally posted by mark shead View Post
                    Port sizes/flow for a given engine spec is important.

                    Mark
                    Thanks Mark, I'll read into it all abit more.

                    Cheers


                    Follow me on Instagram @billy_rs

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                    • #11
                      I must say Marks advice on here is priceless and it's not like a tuner to dish out free advice like he does

                      Comment


                      • #12
                        Originally posted by AJC View Post
                        I must say Marks advice on here is priceless and it's not like a tuner to dish out free advice like he does
                        Seconded in a big way, my car is a million miles away from some of the latest equipment and turbo technology available but his knowledge and helpfulness is of great benefit to us on here.

                        Comment


                        • #13
                          Originally posted by AJC View Post
                          I must say Marks advice on here is priceless and it's not like a tuner to dish out free advice like he does
                          Originally posted by redrsmk5 View Post
                          Seconded in a big way, my car is a million miles away from some of the latest equipment and turbo technology available but his knowledge and helpfulness is of great benefit to us on here.
                          Totally agreed, he's always giving advice and help on every thread he can and posting stats on any of his latest graphs fair play he's well committed to this site,thanks mark
                          (just wish know I could afford to go your route efr etc)

                          Comment


                          • #14
                            Chances are the valve guides will need changing, inlets may be ok but expect to at least have to change the exhaust guides and you mave have some valves with wear to match the guides.
                            Is there any corroision damage ?
                            i you need a head porting send me a pm as i can sort a deal with Roper Developments.

                            Steve

                            Comment


                            • #15
                              Originally posted by steveboyslim View Post
                              Chances are the valve guides will need changing, inlets may be ok but expect to at least have to change the exhaust guides and you mave have some valves with wear to match the guides.
                              Is there any corroision damage ?
                              i you need a head porting send me a pm as i can sort a deal with Roper Developments.

                              Steve
                              That's very kind of you mate. The engine is still together so I'll give you a shout once it's apart


                              Follow me on Instagram @billy_rs

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