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Thread: Supermiata S1 - New turbo class for 2017

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    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Default Supermiata S1 - New turbo class for 2017

    The original idea for Supermiata back in 2009 was a forced induction car. When we finally put it together in 2013, we opted for a simpler, lower cost N/A build to lower the barrier of entry. The current car is technically an S2 though we never used the class designation in public. With S2 participation starting level out (~22 cars built), we decided it's time to start prepping for the launch of S1 in 2017. That involves building a few S1's now and racing them as a demonstration class just ahead of the normal Supermiata start wave. Currently, 4 drivers have committed to building S1's this year. Those are the same drivers that fill most of the podiums of the current races so the playing field in S2 will get a bit more level starting with the September Buttonwillow event. 949 Racing's S1 will debut there.

    S1 technical details


    Unless otherwise specified, the car is basically the current S2 with some nice upgrades. In short, it's a 200whp turbo Miata with a big rear wing and fatter tires. Our estimate is that S1 will be roughly 5s faster than S2 at most tracks.
    Figure 1:55's at Buttonwillow 13 CW in good weather. Like the current S2 class, power, torque and area under the curve will be capped.

    -Forced induction will be a spec kit provided by Trackspeed Engineering employing a Borg EFR 6258 turbo and TSE cast stainless manifold
    -ECU will be limited to Megasquirt based software
    -6 speed transmission allowed
    -APR Performance GT250 or similar will be the spec wing type
    - 4" splitter
    -Spec tire will be the 245/40/15 RC-1 on any wheel width. Many will opt for 15x10's
    - NA chassis will be allowed bolt or rivet on flares to clear the bigger tire
    -Target power is roughly 200whp, 190lbs torque
    -2300# min weight (same as S2)
    -Front brakes will be a spec 11" or 11.75" Wilwood kit, drivers choice

    Conversion from a well prepped S2 to S1 will cost most drivers about $10k.

    If you are genuinely interested in building a car and racing Supermiata within 6 months, contact us at info@949racing.com
    Those new to w2w should run the current S2 class for several races to get their racecraft, car control and awareness up to speed. Bump drafting at 140mph in a four car pack is not the best place for a w2w newb to learn.

    S1 Class | SuperMiata
    Last edited by emilio700; 07-21-2016 at 08:55 AM.
    ucfbrett, bawareca, howang and 3 others like this.
    WWW.949RACING.COM
    SuperMiata

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

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    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    The first car isn't built yet but you can piece together roughly how it will look. Mine will be much orange.

    It'll have aero like Sonny's car for 2013 NASA nationals
    nasa4479.jpg

    And it will have this wheel/tire combo
    09_2014_maxxistest_miller_1.jpg
    WWW.949RACING.COM
    SuperMiata

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

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    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Tentative plan for the S1 upgrade. We will be updating this as we go through the development process during the last few races of the 2016 season.

    Allowed upgrades for S1 from S2

    If not otherwise specified, allowable modifications in S2 are also allowed in S1

    updated June21, 2016. rev 2015.06.21 Copyright Traksport LLC 2016

    B. SuperMiata prep guidelines
    If you don't see it listed here, it's not legal. Feel free to contact Speed Ventures or SuperMiata for clarification

    1. Safety
    B.1.1. Vehicle
    Minimum weight 2300 lbs. With driver in impound.

    3. Engine
    The intent of the engine rules and SPM Power Cap are to allow 100% OEM, unmodified BP05/BP4W/BP6D long blocks to remain competitive in Supermiata races. The max WHP (power), max WTQ (Torque) and Power Area values are all easily achieved with the aforementioned OEM long blocks. Aftermarket and modified internal engine parts are allowed only to improve reliability and cross-compatibility with other racing classes. All non-OEM engines must be detuned to meet SPM power output restrictions and dyno graphs submitted in order to be eligible for championship points. Any competitor utilizing aftermarket or modified engine internals may be disqualified or excluded from racing if their car is found to be outside of SPM power restrictions.
    1. Update/backdate, mix and match of any years 90-05 USDM Miata engine components allowed. Intake manifold may be ported and emissions equipment modified deleted. Non USDM "square top" intake manifold allowed.
    All cars must comply with lbs/hp ratio and Power Area regardless of weight or power.
    2. Turbo system hotside hardware sourced from Trackspeed Engineering must be used. This includes a minimum of TSE exhaust manifold, Borg EFR6258 turbo, TSE downpipe.
    3. >=11.5 lbs/hp maximum. Maximum allowable power measured at the wheels on a Dynojet 248 or 288 with onboard weather station active: 200 horsepower, 180 torque
    4. Power area. Whp limited to a maximum “power area” as follows: Add whp at 4000,4500, 5000,5500,6000,6500,7000rpm. Total value must not exceed 1250
    5. Maximum rev limiter setting for BP 1.8L engines: 7200rpm
    6. ECU is free.
    7. Intake piping: Material is free. All intake piping must be forward of the turbo CHRA (center housing)
    8. Intercooler: Only one may be used. Intercooler must be air to air type. Size unrestricted. Must be located ahead of forward most part of engine and no higher than the upper radiator core support. Intake piping may be wrapped, painted or coated.
    9. OEM MAF/AFM may be modified or removed
    10. Entire exhaust system is free but must exit behind rear axle centerline
    11. Cooling system free. Radiator must retain OEM location and approximate size.
    12. Any single throttle body allowed provided it is no larger than 64mm. OEM throttle plate and shaft may be modified to improve strength.
    13. Allowed fuel: 91 octane pump gas, E85.
    14. Non OEM Engine coatings not allowed. Headers and exhaust may be coated with thermal insulation coating, wrap or paint.
    15. Ignition system free
    16. Wiring harness may be lightened and simplified
    18. Emissions equipment, miscellaneous brackets and equipment in engine bay may be removed to lighten car provided min weight and power cap are observed

    4. Suspension/Drivetrain -

    1. Front brakes:
    a) May use Wilwood Dynalite, Powerlite or Superlite 4 or 6 piston calipers
    b) May use 11x8.10 or 11.75x.810 rotors
    c) Non- ferrous rotors not allowed

    2. Coilovers with a maximum of 1 damping adjustment allowed
    3. Spring rates free
    4. Spec tire is 245/50/15 Maxxis RC-1. Wheels are free but must be one piece cast aluminum. No forged or multi piece wheels.
    3. Diff mounts free
    4. Any one piece sway bars allowed
    5. End links free provided they attach in OEM locations
    6. Any polymer suspension bushings allowed. No metal bushings or bearings allowed. Eccentric offset control arm bushings for camber correction allowed
    7. Brakes may be updated/backdated in any combination of 90-05 components. Pads free. Brake ducts free
    8. Final drive ratio can be 3.9, 4.1, 4.3.
    9. OEM optional Torsen or Tochigi-Fuji differential allowed. No aftermarket diffs allowed.
    10. OEM 5 spd or 6 speed transmision only. Non-OEM transmissions not allowed
    11. Rain tires: Maxxis VR-1 in 205/50/15, 225/45/15 or 245/40/15 allowed. Race will be declared "Wet Race" no later than 30 minutes prior to start. Protocol is entire track is wet, no dry line, 100% cloud cover and rain forecast to be declared a Wet Race.
    12. Differential and transmission cooler may be added
    13. Fuel cell may be added provided it is located entirely within OEM fuel tank compartment

    5. Body - Aero
    1. Vertical front air dam allowed. Air dam must originate no higher than forward most point of OEM bumper skin. Air dam may extend to left and right ends of bumper skin but not beyond. Air dam may not be canted more than 2° from vertical, measured from corrected ground plane.

    2. Splitter:
    a) Material, free.
    b) Splitter may extend no more than 4" from air dam vertical surface.
    c) Splitter may not be wider than nor extend past ends of air dam.
    d) Splitter must be within 3° of horizontal, measured from corrected ground plane
    e) Lower most point of splitter forward of air dam plane must be no less than 3.5" above ground plane at 2300#
    f) Splitter must support 100 lbs vertical load applied at any point within 20" of car centerline
    g ) Splitter must have no curvature in any direction

    3. Under tray may extend from front axle centerline to air dam. Undertray must be flat, have no more than 2° angle and have no curvature.
    3. Rear wing:
    a) Must have mounts that originate from rear half of trunk lid.
    b) Mounts must go through trunk lid and attach to frame in side trunk.
    c) Foil (not including end plates) must be located entirely within a virtual "box" as follows: Forward limit is mid point of trunk lid measured on centerline of car. Rear limit is 6" behind the rearmost point of the rear bumper. Upper limit is the highest point of the roof. Lower limit is a plane 7" below the highest point of the roof.
    d) Foil can be no wider than 64" including end plates. No broader chord than 10.5"
    e) End plates must be no greater than 11" tall or 14" wide. No greater than 154" square inches total.

    4. Chassis may be fully seam welded

    5. Two additional attachment points for passenger side door bars may be added

    6. Dash bar, door hoop may be attached to firewall and A pillar

    7. No limit to number of attachment points of main hoop to body

    8. External holes in bodywork for cooling may be added forward of the leading edge of the doors and base of windshield. Holes must be no larger than 120 square inches combined. Holes must not provide any significant or measureable downforce.
    WWW.949RACING.COM
    SuperMiata

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

  4. #4
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Virtual box for foil placement.

    s1_aero_example_wing.jpg
    WWW.949RACING.COM
    SuperMiata

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

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    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    For those that might be wondering how much headroom an S1 build will have for more hp with the boost turned up, the turbo itself will make around 300whp on a stock Miata head on gas. On E85, 3" exhaust and big valve ported head, around 340whp. So most of the folks building these
    cars will be just a map switch away from 300whp. This will require bigger injectors and higher capacity fuel pump but the intercooler that comes with the kit will be sized for 300whp. Most current S2 owners have a high power map that bumps from the mandated 140whp to maybe 150whp or so. S1 owners
    will enjoy a 30% power increase with their high power map. Depending on tires used and comp weight, an S1 will crossover to ST3 with a power bump to 240-265whp and no other changes.
    WWW.949RACING.COM
    SuperMiata

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

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    How do you think the cars will hold up engine temp wise during a 30 minute session in the middle of a California summer with the power at ST3 levels? I imagine hood louvers, proper radiator ducting, and an oil cooler would be minimum requirement. Any other tricks to keep turbo Miatas cool in these longer summer sessions? Probably not an issue with SPM since you guys only do 5 laps iirc.
    bawareca likes this.
    1:46.3X @ BRP CW13 - 11/12/15 (400 whp, TD )
    1:26.82 @ WSIR - 10/12/14 (400whp, NT01)
    1:22.7X @ SOW CW - 7/31/14 (400whp, NT01)
    1:21.6X @ SOW CCW - 7/30/14 (400whp, Nt01)
    2:00.01 @ CVR CW - 9/28/13 (350whp, RS3)
    1:48.22 @ ACS - 11/23/13 (400whp, RS3)

  7. #7
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Quote Originally Posted by Johns_EvoIXSE View Post
    How do you think the cars will hold up engine temp wise during a 30 minute session in the middle of a California summer with the power at ST3 levels? I imagine hood louvers, proper radiator ducting, and an oil cooler would be minimum requirement. Any other tricks to keep turbo Miatas cool in these longer summer sessions? Probably not an issue with SPM since you guys only do 5 laps iirc.
    It's actually a well trodden path. Not a foray into the unknown.

    Miata cooling system thread - Miata Turbo Forum -Boost cars, acquire cats.
    WWW.949RACING.COM
    SuperMiata

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

  8. #8
    Senior Member bellwilliam's Avatar
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    Quote Originally Posted by Johns_EvoIXSE View Post
    How do you think the cars will hold up engine temp wise during a 30 minute session in the middle of a California summer with the power at ST3 levels? I imagine hood louvers, proper radiator ducting, and an oil cooler would be minimum requirement. Any other tricks to keep turbo Miatas cool in these longer summer sessions? Probably not an issue with SPM since you guys only do 5 laps iirc.
    If you think about it. Power more or less equal thermal output. So it really isn't that much different from other 200whp turbo cars.
    Supermiata S1, SuperMiata S2, Supermiata S3
    13 Tesla, ma: no engine !!
    16 Cruze, free car !!
    08 M3 - Carmax warranty !!
    96 NSX
    06 EVO MR
    15 Mini Cooper S

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    SuperMiata

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

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    Am I reading it wrong? In one place it says 200whp, on the same page under the Clif Notes it says 220whp 220 torque.
    99 Mazda Miata SuperMiata #515 - AKA Sparky SOLD
    '91 Mariner Blue Miata project AKA Napoleon

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    Quote Originally Posted by Red_5 View Post
    Am I reading it wrong? In one place it says 200whp, on the same page under the Clif Notes it says 220whp 220 torque.
    Rule set on supermiata site will always be the most current. In any case, does it matter?
    WWW.949RACING.COM
    SuperMiata

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

  12. #12
    The Real Captain Slow Red_5's Avatar
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    Quote Originally Posted by emilio700 View Post
    Rule set on supermiata site will always be the most current. In any case, does it matter?
    It is on the Supermiata site. I was just trying to point it out so you could correct it. Just trying to help.

    S1 technical details

    Unless otherwise specified, the car is basically the current S2 with some nice upgrades. In short, it’s a 200whp turbo Miata with a big rear wing and fatter tires. Our estimate is that S1 will be roughly 5s faster than S2 at most tracks.
    Figure 1:55’s at Buttonwillow 13 CW in good weather. Like the current S2 class, power, torque and area under the curve will be capped.

    Clif notes:
    -Forced induction will be a spec kit provided by Trackspeed Engineering employing a Borg EFR 6258 turbo and TSE cast stainless manifold
    -ECU will be limited to Megasquirt based software
    -6 speed transmission allowed
    -APR Performance GT250 or similar will be the spec wing type
    – 4″ splitter
    -Spec tire will be the 245/40/15 RC-1 on any wheel width. Many will opt for 15×10’s
    – NA chassis will be allowed bolt or rivet on flares to clear the bigger tire
    -Target power is roughly 220whp, 220lbs torque
    -2300# min weight (same as S2)
    -Front brakes will be a drivers choice of Wilwood calipers, 11.75″ maximum
    -Conversion from a well prepped S2 to S1 will cost most drivers about $10k.
    99 Mazda Miata SuperMiata #515 - AKA Sparky SOLD
    '91 Mariner Blue Miata project AKA Napoleon

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