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LFX (GM V6) in a Miata @ Goodwin Racing

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  • Drivetrain is back in the car as of today, filled with fluids, test fired, bled, etc. So far I can say for the first time that the shifter feels great! Return to center in neutral feels natural and all of the "clunky stickiness" I had before is gone now. The shift rod pivot was definitely the problem there. Fingers crossed that the clutch engagement issues are equally fixed!

    Didn't take any pics today but SuperStreet just released their coverage of Superlap Battle (link here), so here's a shot from them of the engine bay, which is where I've been spending my evenings lately:

    Ryan Passey
    Singulär Motorsports | Goodwin Racing

    #13 1990 Miata
    "The sport dedicating to the spirits of time attacking motoring" -Emilio

    Comment


    • Hi
      Last edited by mgamma500; 03-18-2018, 05:25 PM. Reason: was answered later in the thread
      Life is short, so drive fast, live fast and die chasing your dreams!

      Comment


      • Hey Ryan, Google has unlimited free storage of photos.

        Mark
        Life is short, so drive fast, live fast and die chasing your dreams!

        Comment


        • Sweetness man, way to go! This is all the proof I need to continue my V-6 build.

          Mark
          Life is short, so drive fast, live fast and die chasing your dreams!

          Comment


          • Wow suddenly a month's gone by!

            We left off with heading out for the first test day of the year at Streets of Willow CCW. This was a Roadster Cup event so the plan was to have equal parts fun hanging out with friends in that series and doing demo laps in their run group and also to work on initial setup and testing of the changes made during the winter.



            On the testing side, I did one shake-down session Saturday afternoon. The car felt stronger than ever on the E85. However, it was showing some issues in the chassis and handling; brakes were touchy and quick to lock up, the car wouldn't rotate the way I wanted, and it was skipping over bumps (particularly problematic on such a bumpy track). This resulted in quickly flat spotting the set of tires I was on, and here is where my first BIG "thank you" comes along because Saturday night I left the racetrack and drove to Northridge where Moti met me and generously loaned me the wheels and tires right off Creampuff so I could have something to run the car on on Sunday.



            Sunday was more of the same struggles. I had to drive very patiently, give myself extra braking distance, reduce corner entry speed until the car would be willing to turn, etc. Tip-toeing around these issues resulted in a best time of 1:19.488, an exact match to the thousandth with the standard Miata lap record.



            Hard to be unhappy with matching the Miata record, but I left the event feeling like I have some unfinished business with this track knowing the car wasn't right. I didn't even post an update here because I put the car on the rack and immediately started crawling around on it to figure out what was wrong. My second big "thank you" goes to 949Racing/Supermiata who provided a ton of input to help pinpoint the issues and then work through them.

            We uncovered several surprises. The largest one was that the new V8R tubular front lower control arms interfered significantly with the downpipes during suspension compression. Easy to see why the car was skipping over bumps and the shocks couldn't do their job - the suspension was going effectively solid. Not the fault of the arms, obviously I'm the one who put downpipes in the wheel wells, and I had factory arms when I made them. One item or the other had to be altered, and for several reasons I decided it was the arms that had to be reworked. The arms were cut, reshaped, reinforced with extra gusseting, and then capped. With the revisions, the suspension could finally do its thing:



            Along with the major interference of the front lower arms, once that item was sorted I launched into a week of examining the suspension and wheel/tire travel. Even though my previous shocks had the same total stroke as these, the XIDAs use more of that stoke for bump travel. As a result, I found several other areas that had more minor interference issues at close to full compression, and we dealt with each item as I found it until suspension range of motion was maximized.

            Finally, I've been chasing a pad knockback issue caused by significant flexing in the front uprights. Stoptech has been superb in their ongoing support, and to establish whether a floating rotor can solve this issue I've switched to Stoptech's 11" floating rotors in front.



            With things sorted out much better at this point, I went to West End to get re-aligned and properly corner balanced. They got the cross weights exact to the pound.



            The Streets of Willow test was invaluable in that it uncovered some big issues to address, but because the suspension wasn’t working right there was zero progress on learning and setting up the new pieces in the system. The second test at Chuckwalla Valley Raceway would be the first opportunity for this.

            This turned out to be an excellent two days out in the desert. I had a chance to begin tweaking shock settings, the brakes were rock solid with the knockback gone, and I got a ton of laps in. Very refreshing after the last test to have the car feeling right now.



            My best from December at this track was a 1:51.4. Returning this time on test tires I wasn’t expecting to be much faster, just focus on setup. However, to my pleasant surprise I set a new best of 1:49.777. I was really stoked to see a sub-1:50 on the AIM at the time, but it was only later when I started looking around at other lap times that I realized there was more significance to it. This is a new track record for a modified production car!





            Ryan Passey
            Singulär Motorsports | Goodwin Racing

            #13 1990 Miata
            "The sport dedicating to the spirits of time attacking motoring" -Emilio

            Comment


            • Got to see this car in person for the first time at Chuckwalla. One word only, IMPRESSIVE

              Comment


              • Originally posted by craZee View Post
                Got to see this car in person for the first time at Chuckwalla. One word only, IMPRESSIVE
                Why thank you!


                With the car running well at Chuckwalla, I've entered GTA's ProAm Round 1 at Buttonwillow coming up this Saturday. Made a couple little tweaks and repairs on the car this past weekend and tires are on the way. Limited class overall looks like a fun group, time to party:

                Ryan Passey
                Singulär Motorsports | Goodwin Racing

                #13 1990 Miata
                "The sport dedicating to the spirits of time attacking motoring" -Emilio

                Comment


                • Fantastic build thread!!! Update on the clutch situation? I’m starting my lfx swap for my autocross car and am trying to decide what to do for a clutch setup. Shandelle actually suggested I use the stock flywheel and clutch setup. I’d certainly like to eliminate the rotation mass, but this journey is one of getting back to actually having fun racing, instead of constantly chasing problems.

                  Comment


                  • That is an impressive car. I can't believe that CVR time.
                    2001 MR2-Eleven
                    Experience Points: 21
                    Youtube Channel.

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                    • Late update, as soon as I got back from Buttonwillow I jumped into a pile of work with product development and am still going at it.

                      The day went exactly how you want every race to go: used setup notes from previous times here to best-guess the morning setup and that got it 90% there right out of the gate. Minor adjustments in a few areas after first session and the car was strong. Increased the gap from the rest of the field through the day and finished 5 seconds up from 2nd place. New PB of 1:47.5 (1 sec improvement on my time from SLB).

                      Forget the long write-up here are some tasty pics and vid from the weekend!











                      Ryan Passey
                      Singulär Motorsports | Goodwin Racing

                      #13 1990 Miata
                      "The sport dedicating to the spirits of time attacking motoring" -Emilio

                      Comment


                      • Originally posted by guttedmiata View Post
                        Fantastic build thread!!! Update on the clutch situation? I’m starting my lfx swap for my autocross car and am trying to decide what to do for a clutch setup. Shandelle actually suggested I use the stock flywheel and clutch setup. I’d certainly like to eliminate the rotation mass, but this journey is one of getting back to actually having fun racing, instead of constantly chasing problems.
                        I just ordered a factory clutch and flywheel. Perhaps that says it all?
                        Ryan Passey
                        Singulär Motorsports | Goodwin Racing

                        #13 1990 Miata
                        "The sport dedicating to the spirits of time attacking motoring" -Emilio

                        Comment


                        • Ryan, any plans for a full cage in this?

                          Comment


                          • Originally posted by Schmoe Money View Post
                            Ryan, any plans for a full cage in this?
                            Ha. Delicate subject that. Cage adds weight, isn't required by the rules and Ryan is quite plainly, trying to build the fastest "street" tired Miata ever built.. ever.
                            In fact, I think it already is. So I'm guessing there are no immediate plans for the full cage
                            WWW.949RACING.COM
                            SuperMiata

                            Aside from their cost I never understood why people race them.
                            But obviously I just dont get it. -fatbillybob

                            Comment


                            • So no plans to incorporate the Hankook TD in a 255 17?
                              SuperMiata S2 Class #33

                              Comment


                              • Originally posted by Johns_EvoIXSE View Post
                                So no plans to incorporate the Hankook TD in a 255 17?
                                IF I do, I won't be stopping at 255
                                Ryan Passey
                                Singulär Motorsports | Goodwin Racing

                                #13 1990 Miata
                                "The sport dedicating to the spirits of time attacking motoring" -Emilio

                                Comment

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