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Thread: SoCal SuperMiata thread

  1. #281
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Default SuperMiata sample dyno plot

    This is an example of a legal dyno plot. Dynojet 248 and 288 only. Must display dyno all weather station values active and SAE correction factor.

    This power level can be easily attained with the following legal modifications:
    • 99-05 cylinder head or complete engine. 100% stock
    • Generic exhaust header. Racing Beat is recommended
    • Generic high flow exhaust and cat delete. Racing Beat, Borla XR-1 and Flowmaster are good options
    • DIY or aftermarket intake pipe and cone filter
    • Programmable engine management computer (ECU) and a good tune
    • 91 octane pump gas

    Optionally, you may add Chinese made >535 gram forged connecting rods and double valve springs to give your engine some protection from accidental ”money shift” over rev. The rods and valve springs to not add power.
    supermiata_sample_dyno_2014.jpg
    WWW.949RACING.COM
    SuperMiata

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

  2. #282
    Señor Member b3d3g1's Avatar
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    How will you be handling a stock ECU in terms of rev limiter? My '91 ECU is 7200 until I can get an programmable ECU in there but I'm also not even close to the power limit.
    -Anthony
    1991 Miata - Trogdor SuperMiata
    2011 Ram 2500 - all the torque
    2016 Kawasaki Versys 650LT - commuter
    2016 KTM 690 Duke - parked at the dealer

  3. #283
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Quote Originally Posted by b3d3g1 View Post
    How will you be handling a stock ECU in terms of rev limiter? My '91 ECU is 7200 until I can get an programmable ECU in there but I'm also not even close to the power limit.
    If it's a 1.6 or NA8 engine, we'll allow the OEM rev limit. If it's an NB engine at anywhere near 140whp, it has to be 7000.
    WWW.949RACING.COM
    SuperMiata

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

  4. #284
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    WWW.949RACING.COM
    SuperMiata

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

  5. #285
    Señor Member b3d3g1's Avatar
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    Questions after looking through the latest draft:

    1. Is there a minimum comp weight other than fun run spec miatas?
    - 16 lb/hp puts me under 2000 lbs

    2. "Trunk mounted ducktail spoiler of no more than 10″ in length may be mounted at any gle. Ducktail must be 2D only, no significant curvature, and have no fences or gurneys. Ducktail must not overlap trunklid edges and must be mounted within 4″ of trailing edge of lid."
    What exactly are trunklid edges? Does this mean the spoiler has to be the width of the trunk?
    This is how my car currently sits. What do I need to change to comply? the uncut size of the polycarbonate is 12" x 48"
    2013-07-17-20.02.31.jpg
    -Anthony
    1991 Miata - Trogdor SuperMiata
    2011 Ram 2500 - all the torque
    2016 Kawasaki Versys 650LT - commuter
    2016 KTM 690 Duke - parked at the dealer

  6. #286
    Administrator ucfbrett's Avatar
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    With that air dam, you can race your Expedition.

  7. #287
    Senior Member granth's Avatar
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    Quote Originally Posted by bellwilliam View Post
    you can buy one of those cheapo right side net for $30......
    it's not the cost, just makes it harder to see the right side/back half of the car. I like my field of vision now and really do not want to make it any smaller..
    one of the many reason to spend money on a good Cobra Evo seat..

  8. #288
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Quote Originally Posted by b3d3g1 View Post
    Questions after looking through the latest draft:

    1. Is there a minimum comp weight other than fun run spec miatas?
    - 16 lb/hp puts me under 2000 lbs

    2. "Trunk mounted ducktail spoiler of no more than 10″ in length may be mounted at any gle. Ducktail must be 2D only, no significant curvature, and have no fences or gurneys. Ducktail must not overlap trunklid edges and must be mounted within 4″ of trailing edge of lid."
    What exactly are trunklid edges? Does this mean the spoiler has to be the width of the trunk?
    This is how my car currently sits. KWhat do I need to change to comply? the uncut size of the polycarbonate is 12" x 48"]
    We will probably set min weight for fun runs at 2000# to allow those that are way underpowered to still have some fun. Ducktail looks fine. Crushers is not quite to spec either.
    WWW.949RACING.COM
    SuperMiata

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

  9. #289
    The Real Captain Slow Red_5's Avatar
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    Anthony, can you help me with my aero sometime?
    99 Mazda Miata SuperMiata #515 - AKA Sparky SOLD
    '91 Mariner Blue Miata project AKA Napoleon

  10. #290
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Default NA8 engine tuning

    We did some experimenting on Sonny's car "Monty" this morning.
    1st plot, bone stock, race exhaust bolted to OEM downpipe, CA91.
    2nd plot same, but with these changes
    21" aluminum intake pipe routed to passenger side with cone filter
    MAF delete
    E85
    MSPNP2 ECU

    I think all we need is a Racing Beat header to get this little BP05 overachiever to the 140whp cap. Good news for those out there with healthy NA8's that don't want to invest in an NB engine for SPM.

    This is the E85 station we always hit on the way to points north.

    Chevron - 24 hrs self serve
    12881 Encinitas Ave
    Sylmar, CA 91342
    (Roxford exit)

    monty_092013_135whp_e85.jpg
    WWW.949RACING.COM
    SuperMiata

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

  11. #291
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    I might be making a guest appearance this Sunday (8/22/13) at Buttonwillow in MY "SuperMiata" (aka '04 Honda S2000 AP2). Accuweather says the temp will be 79 degrees. Amazing for this time of year in hell.
    The deposed former Sheriff of trackHQ . . .

    2006 Porsche 997 Carerra Coupe 6-MT - daily driver
    1992 Honda (Acura) NSX 5-MT - classic investment I couldn't resist and occasionally drive
    2004 Honda S2000 AP2 6-MT - track day car
    2006 Mitsubishi Lancer Evolution IX MR 6-MT - when I need a backseat, 4-doors, or a real trunk, and still want to haul ass . . .

  12. #292
    I wanna go fast! thepass's Avatar
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    The rules already specify a max hp and power to weight ratio and it's common knowledge that for wheel to wheel racing, the slightly heavier car with more power is usually a better setup, so the "best" setup will be to get as close to 140 whp as possible, and then the 16lbs/hp cap determines your min weight for you.

    But, keeping the minimum weight low (like 2000) or even unrestricted, allows those with less than optimal drivetrains to still have some chance at equality by just using the hp/weight for whatever power they are making under 140. Is good

    -Ryan
    Last edited by thepass; 09-20-2013 at 11:51 PM.
    Ryan Passey
    Singulär Motorsports | Goodwin Racing

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

  13. #293
    BMW Master bawareca's Avatar
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    Nice meeting most of you guys sunday.
    Without the front splitter and with low boost settings I was running 2:05-2:06,one understeering SOB.However,without the rear wing the times went up to 2:09,one ovesrteering monster.Looks like with a small rear spoiler my times may be very close to SPM,on most tracks.

  14. #294
    The Real Captain Slow Red_5's Avatar
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    With the power cap and power curve restriction, why outlaw balanced and blueprinted engines? I honestly don't understand what advantage it creates. Several here have figured out how to tune even a stock engine well beyond the power restrictions so why limit engines built for longevity?
    99 Mazda Miata SuperMiata #515 - AKA Sparky SOLD
    '91 Mariner Blue Miata project AKA Napoleon

  15. #295
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Quote Originally Posted by Red_5 View Post
    With the power cap and power curve restriction, why outlaw balanced and blueprinted engines? I honestly don't understand what advantage it creates. Several here have figured out how to tune even a stock engine well beyond the power restrictions so why limit engines built for longevity?
    Longevity, yes. Power no. Your blueprinted 83.5mm engine is fine.

    Stock dimensions, stock component weights, I'm fine with. It's when we go outside of that and start messing with the ports that I draw the line.

    A heavily lightened high compression 2.0L can create 125whp at 3000rpm. You want to race against an engine like that? Sorry but I am not going to be flexible on this. The moment I do that i might as well allow $7000 Spec Miata pro motors to run for points against Alex's tired (but 140whp) junkyard motor for championship points. Ain't gonna happen.
    WWW.949RACING.COM
    SuperMiata

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

  16. #296
    Senior Member bellwilliam's Avatar
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    Is MSM cam allowed. Pretty cheap for the performance (5-6 whp ?)

    Does MSM cam mod only work in NB1 motor ?
    Supermiata S1, SuperMiata S2, Supermiata S3
    13 Tesla, ma: no engine !!
    17 GT350 !!
    08 M3 - Carmax warranty !!
    96 NSX
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  17. #297
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    Quote Originally Posted by emilio700 View Post
    A heavily lightened high compression 2.0L can create 125whp at 3000rpm.
    220ft.lbs at 3000rpm is a very special N/A motor indeed.
    Theseus: '94 Miata, NASA SU/TTU (in progress)
    Rover: '90 Miata, NASA PTE/E3

  18. #298
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Quote Originally Posted by bellwilliam View Post
    Is MSM cam allowed. Pretty cheap for the performance (5-6 whp ?)

    Does MSM cam mod only work in NB1 motor ?
    MSM BP5A-12-420 cam works in BP4W (NB1). It can also be adapted to the BP05 (NA8) head with the solid lifters and valve retainers from the NB.

    I can see where this is going. Everyone wants to run the engine they already have. That's fine but if it is not a bone stock engine, you must show up at your first SPM race with a current dyno sheet, no exceptions.
    WWW.949RACING.COM
    SuperMiata

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

  19. #299
    http://www.trackhq.com/Banners/yellowsitesponsor.gif emilio700's Avatar
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    Default E85 to help an old motor

    Even a beat junkyard motor makes enough power. This is the junkyard NB1 motor that just went into Alex's car. He tells me it has around 160psi in all cylinders. Down quite a bit from the 200psi of a freshly rebuilt NB1.
    As expected, it didn't make 140whp. Maxed out at about 134whp on pump gas. Power Area of 621. Drained the tank, filled with E85, retuned and found another 5whp. Power area jumped to 655, which is 10 shy of the cap. A fresh NB1 motor will easily make the cap without resorting to E85.

    Blue line is E85. Red line CA91. This motor only made about 4% more power on corn because it's so tired.

    100313_ca91_e85_nb1.jpg
    WWW.949RACING.COM
    SuperMiata

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

  20. #300
    The Real Captain Slow Red_5's Avatar
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    Quote Originally Posted by emilio700 View Post
    Longevity, yes. Power no. Your blueprinted 83.5mm engine is fine.

    Stock dimensions, stock component weights, I'm fine with. It's when we go outside of that and start messing with the ports that I draw the line.

    A heavily lightened high compression 2.0L can create 125whp at 3000rpm. You want to race against an engine like that? Sorry but I am not going to be flexible on this. The moment I do that i might as well allow $7000 Spec Miata pro motors to run for points against Alex's tired (but 140whp) junkyard motor for championship points. Ain't gonna happen.
    I thought the point of the various power rules were to prevent built for power engines. Would the above mentioned stroker motor pass a dyno test?
    Quote Originally Posted by emilio700 View Post
    I can see where this is going. Everyone wants to run the engine they already have. That's fine but if it is not a bone stock engine, you must show up at your first SPM race with a current dyno sheet, no exceptions.
    Well yes, for me to get my car to SPM spec and keep the parts for PT racing would cost around $3k - engine, Torsen, stand-alone ECU, dyno time. I also need a new SA10 helmet and my harnesses are now past date. At least I have the tires.
    99 Mazda Miata SuperMiata #515 - AKA Sparky SOLD
    '91 Mariner Blue Miata project AKA Napoleon

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