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Thread: LFX (GM V6) in a Miata @ Goodwin Racing

  1. #181
    I wanna go fast! thepass's Avatar
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    Great Miatas @ MRLS event! I'm working on gettings some pics/vid together from that. In the mean time, there were a couple things that sprang up at ACS that I needed to solve, and now after running MRLS I can confirm the fixes worked so I'll cover those..

    First up, the differential fluid was exiting the vent cap on the top of the diff, leaving a very traceable mess on the underside of the rear subframe and down the side of the diff. A quick check with V8R confirmed they've seen this happen and fixed it by replacing the vent cap with a hose barb fitting and running a vent line up higher.

    Vent cap (right) is just removed with pliers. It's being replaced with the 1/4" NPT to 3/8" barb fitting on the left:



    Tapping the hole for the fitting is a treat when the diff is up in the car. I'd call changing the vent config on the getrag a must-do item so if you haven't installed your diff yet, just do this now before installing everything:



    Fitting and hose installed with a loop in the hose:



    If the vent tube mod works, we can just run the hose to the open air. But since we didn't know yet if it would work, I wanted to run the line to a reservoir to catch the fluid in the event that it was still losing any. I repurposed a Wilwood brake fluid remote reservoir for the task, with a barb fitting installed in the cap and a hole drilled in the top of the reservoir to vent pressure:



    After 3 days at MRLS, the reservoir is still dry so that's confirmed that the vent hose is working perfectly.

    The second fluid that was trying to exit the vehicle was the power steering fluid. This one was a bit trickier to diagnose but I came to the conclusion that because the reservoir cap was a vented/non-sealed design, in high-G right hand turns the fluid was being pushed against the side of the tank and effectively submerging the side of the cap, and thus exiting via the cap's vent.

    The cap needed to be sealed. I didn't take a pic of this but sealing the cap involved drilling out the spot welds that held the three pieces of the cap together, removing the vent ring, welding the two remaining pieces of the cap back together and then ordering a second cap to scavenge a second O-ring from and doubling up the O-rings under the cap to take up the height of the missing vent ring and seal to the reservoir neck.

    With the cap sealed, the tank still needs a way to vent pressure. Drilled/tapped a small 1/16 MPT hole in the upper left hand corner of the tank and ran a vent line off that, with a loop to stop fluid from passing down the line:



    Same as the diff vent line, to confirm the modifications were working as intended, I repurposed another brake fluid remote reservoir to serve as a catch can:



    Same story, 3 days at MRLS and the reservoir remained dry. Fix worked.
    Ryan Passey
    Singulär Motorsports | Goodwin Racing

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

  2. #182
    I wanna go fast! thepass's Avatar
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    2017 Miatas @ MRLS! The final week of prep before the event there was a lot of crunching to get things done in time. Lots of little details here and there, and finished it up with completing the color scheme on the car which included wrapping the new hood and adding details on some other panels.

    Made the pilgrimage up to Laguna Seca and had an awesome three days up there. In short, more confirmation that the car has lots of potential.. this isn't the type of event for putting down fast laps, we're mostly giving rides and making sure to play nice with all the traffic out there, but Sunday morning I did get one fun clear lap. I wasn't pushing things, just having fun chasing Jess Heitman in his V8 Prod car, waiting a month between upshifts (because we're still chasing the shifting issue) and still that lap was good for a 1:38.6. On street tires. I wasn't even thinking it would be a quick lap until I crossed the start/finish and saw it come up on the AIM.

    Pics!











    Holy tire deflection batman!



    And footage of a fun lap! The sound of that motor echoing off the pit wall going down the front straight is just rock and roll. But the best part was getting my dad in the car for a couple laps and his reaction at the end:



    I did have a sound issue over the weekend. Car hit 107db in the cool morning air XD so a track-side fix was needed. Brian had the great idea to rotate the passenger side muffler on the V-band so the outlet was pointed at the ground instead of straight at the sound booth (which is located at right side of the track between turn 6 and 7). A little Macguyver action with a coat hanger and things were adequately suspended from the mounting points. Sound check confirmed this dropped output to 101-102 db at the booth and I ran it this way the rest of the weekend:

    Last edited by thepass; 10-11-2017 at 08:34 PM.
    Ryan Passey
    Singulär Motorsports | Goodwin Racing

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

  3. #183
    BMW Master bawareca's Avatar
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    It is funny that yours and my motor dint have much in common, but sound absolutely identical. I will post a video confirmation soon.
    A few years ago I took my dad for a ride around a Buttonwillow, at the age of 78, and he was beyond excited.
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  4. #184
    I wanna go fast! thepass's Avatar
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    A couple clips friend Greg took from trackside:



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    Ryan Passey
    Singulär Motorsports | Goodwin Racing

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

  5. #185
    http://www.trackhq.com/Banners/yellowsitesponsor.gif Blackbird's Avatar
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    I got to take my mom out for a ride around BRP, she was so terrified that I had to slow WAAAAY down and ended coming in after 2 laps, the faster of which was a 2:38... Lol

  6. #186
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    The car sounds great. Would love to see the car in person if I ever got the chance.

    Sucks to hear you are having issues still with slow shifts. From what it seemed like around the webs is that when it degrades it's usually a quick but progressive degradation of shifting performance.

    Best of luck on the track and keep the videos coming, love em.

  7. #187
    I wanna go fast! thepass's Avatar
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    Superlap Battle is two days away! Since MRLS, there have been many updates. Since I'm currently running around like crazy getting the finishing touches done on both my car and the shop's ND before the event, I'll have to keep the update brief for now.

    CCP Fab composite doors with my special request for a kevlar inner layer to help with debris protection. Very light, 5.55 lbs per door without hardware/latches. Dropped 41.7 lbs total from the car swapping from my cut up factory doors. The aluminum rod was added to help with flex:





    Beginning to add more of the aero package I have planned for this car, new side skirts/barge boards and rear tire spats fabbed up to control the air down the side of the car:



    The apparent simplicity of these when you look at them really belies the complexity of making them. There are several pieces that go into the full thing, not to mention a full array of brackets for mounting and completely re-engineering the way you put the car on a lift or jack stands. The jack stand points are now these little removable units that have threaded tops that screw up through the barge boards in to receivers welded to the car so that when you remove them there's only a nice flat surface left:



    Also needed a jack point to lift the car from when at the track. The barge boards are too low/stick out too far to put a jack under the car. Moti recently solved this same thing elegantly on Creampuff with a receiver welded to the cage and a removable lift arm and I mimicked that design, but with mine located on a more rearward cage point since my doors have to swing open:



    The receiver sits flush with the outer door face when the door is closed. Don't have a pic of the removable lift arm but it slides into the receiver:



    Further cutting weight, Buttonwillow has no sound limits. No need for extra weight in the exhaust for this event. Going full race car, no cat and minimal muffler. Dropped 10.5 lbs in total from the car. I will be packing ear plugs for this one.



    Small titanium heat shield on the barge board:



    Side of the car in the new SLB config:



    Finally, adding all the downforce possible was high on the must-do list for SLB. Two weeks ago Moti and I spent 60+ hours over a weekend working on our evil world domination plans to build new next-level splitters for both Creampuff and this car. Design and mold construction took a massive amount of time, and there was only enough time to (barely) finish one splitter before SLB so we made the call that Creampuff should get that splitter.

    I CAN'T WAIT for you guys to see what we have been cooking up on the new splitters, that will debut on Creampuff in a couple days. BUT that also means I'm still on my old generation splitter for this event. In an effort to maximize downforce production with what I have, with the little time I had left I put together add-on splitter extensions. Nothing advanced but it will be effective. These increase splitter total width by 10".



    To help balance the front additions, the rear wing gets some "go big or go home" endplates.

    Car is on deck at the alignment shop, sans splitter:

    BOWERSdaAZIAN, Red_5 and bawareca like this.
    Ryan Passey
    Singulär Motorsports | Goodwin Racing

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

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