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Originally Posted by rzupancic
(Post 1493676)
And quoted for peer pressure :eek3dance
Originally Posted by jpreston
(Post 1493678)
Yeah yeah... I'm a bum, I know.
I really want to do Sonoma someday..... |
Originally Posted by flier129
(Post 1493757)
I really want to do Sonoma someday.....
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Originally Posted by doward
(Post 1493762)
I've driven your car twice now. Lets set it up.
https://cimg0.ibsrv.net/gimg/www.mia...25511c3672.jpg https://cimg2.ibsrv.net/gimg/www.mia...22962844bb.jpg |
FYI...totally just ribbing Marcus. I'd let him drive my car again in a heartbeat. Pretty sure my POS car broke causing the incident, not Marcus's driving. |
:cry:
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Maybe I’d better drive Marcus’s car one more time beforehand... |
Because I am a ricer...
Plan is to box/shroud that 6" velocity stack filter and try to keep the intake tube at ~19". Then wrap it all in gold foil. https://cimg3.ibsrv.net/gimg/www.mia...022a70ad59.jpg https://cimg4.ibsrv.net/gimg/www.mia...421cf58a6f.jpg |
List for Sonoma is:
1. Replace broken trans. My 5th gear has been dead for several events. I only need 5th at one track, so i've run Buttonwillow and Chuckwalla with a "4 speed". A 6spd and MiataRoadster shifter are going in. 2. Relocate my killswitch. NASA tech did not require it to be within drivers reach while belted. Easiest place to install it was passenger b pillar area. It is now moved to the center of my new 'dash'. 3. Delete my keyed ignition. I removed the lock pin from the the steering column over the winter, but hadn't made the leap to wiring in my Longacre starter panel. That's now done, thanks to John. 4. Aerocatch latches. PITA, everybody warned me. I procrastinated, but now they're done. 5. Seat and seat mount finalization. I've settled on the Sparco Circuit II and Jerfspeed mounts. Rear humps removed, seat sits on the floor. Stellar. Battery wire along PPF now runs through rear bulkhead and into passenger side of cabin. https://cimg6.ibsrv.net/gimg/www.mia...86715ee92c.jpg https://cimg5.ibsrv.net/gimg/www.mia...9bc9ce75e3.jpg Old location of ignition cylinder left of gauge cluster is now deleted:https://cimg4.ibsrv.net/gimg/www.mia...bdd6d47497.jpg Dual USB charger is hardwired for GoPro and/or AIM Solo charging, or whatever else comes up. https://cimg0.ibsrv.net/gimg/www.mia...e963ef63d2.jpg https://cimg8.ibsrv.net/gimg/www.mia...38a8ae13bf.jpg I had to cut even more crap out of my hood. I am considering how much deleting of the OEM latch to do. Wasn't ready to make to make the jump last night with the cut off wheels. I'll probably drill the rivet, cut the loop in half an fish it out, leaving most of that aluminum material there to box the front bow of the hood for stability. https://cimg3.ibsrv.net/gimg/www.mia...ac2d8de92e.jpg https://cimg1.ibsrv.net/gimg/www.mia...d6781cf001.jpg https://cimg9.ibsrv.net/gimg/www.mia...f56324fef4.jpg |
Sexy
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OK, it's a real racecar now.
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Originally Posted by doward
1. Replace broken trans. My 5th gear has been dead for several events. I only need 5th at one track, so i've run Buttonwillow and Chuckwalla with a "4 speed". A 6spd and MiataRoadster shifter are going in. |
Originally Posted by AA-Ron
(Post 1496093)
Are you not going to run SPM anymore or swap the trans back for those events?
We'll see. I only did 3 SPM races last year, zero so far this year. The car is really fun with the wing and splitter, especially on Hoosiers. The 6spd and more power will only make it even more funner, and even more not SPM S2 legal. I still go to the majority of the SPM events to drive something or give ridealongs or whatever, and will maybe rent a ride if if i get a craving. It is the age-old SPM Spec class vs tinker toys in ST. I like the project-ness of an ST car. I get to be a ricer and the car goes faster. If the new cylinder head doesn't make >15 more whp, I might reevaluate. Sonoma is an SPM weekend, but I'm just trying to win HPDE, as it will my first on-track action since my TBI. If it goes well, I'll race again with NASA ST5 at Buttonwillow. |
Back at the end of 2017 I shattered 5th gear in this $100 NB 5spd. I flushed the fluid a few times and ran my car as a 4 speed for 3 events, ultimately crunching something else in the box at Buttonwillow when my throttle body asploded. Today, I fixed things to nearly wrap up my prep for Sonoma. While I was in there, I found a super crunchy pilot bearing, and while replacing the pilot bearing I stripped one of the threads in the 10 yr old Fuji Racing flywheel. So I decided to upgrade from my eBay clutch... 1.6 Puck Rigid Supermiata Clutch 1.6 Aluminum Supermiata flywheel MazdaRoadster short shifter NB2 6 spd Slave, pilot and throw out bearings Amsoil MTL ...and there was one casualty https://cimg4.ibsrv.net/gimg/www.mia...13df89b2d.jpeg https://cimg9.ibsrv.net/gimg/www.mia...cdb4135aa.jpeg https://cimg0.ibsrv.net/gimg/www.mia...187543b0e.jpeg Should be getting close to my goal of 2100lb comp weight. Still need to swap my cut rear bumper, remove the factory hood latch and loop stuff, and cut the crash beams out of my doors. Then unbolt my ST5 ballast for the HPDE championships at Sonoma and Laguna. |
Originally Posted by doward
(Post 6175650)
List for Sonoma is:
1. Replace broken trans. Done. 2. Relocate my killswitch. Done. 3. Delete my keyed ignition. Done. 4. Aerocatch latches. Done. 5. Seat and seat mount finalization. Done. Extra Credit: Gut doors Gut trunk lid Cut rear bumper Swap to gutted headlights |
never mind
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Originally Posted by 2slow
(Post 1497640)
never mind
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Originally Posted by doward
(Post 1497513)
Back at the end of 2017 I shattered 5th gear in this $100 NB 5spd. |
Originally Posted by emilio700
(Post 1497656)
FS: Miata 4 speed racing transmission, make offer
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I drove it tonight. Man. It rips. 6spd and 4.3 is a hoot. The car is a rat, and my buddy Dave, the previous owner, would absolutely love its current config. I am more excited to drive this version, than any previous version of Button, including the 2016 NASA Championship engine with the fancy OsGiken. 143whp ~2000lbs (2200 with me in it) 2014 “headgate” Spec Miata motor. Racing Beat header Racing Beat exhaust DiY intake OEM squaretop manifold DW450 fuel injectors Walbro 190 fuel pump Megasquirt pnp2 Supermiata QMax coolant reroute Koyo 37mm radiator Amsoil Dominator 10w30 e85 OEM 6spd Miataroadster 6spd shifter kit OEM 4.3 Torsen II Supermiata 1.6 Puck Rigid Sport Clutch Supermiata 1.6 Aluminum flywheel Supermiata driveshaft Supermiata clutch line Energy Suspenion urethane diff bushings Amsoil MTL in the trans Amsoil SVG in the diff 1000/500 Gen2 Supermiata Xida Race Racing Beat 54103 front swaybar Supermiata adjustable rear swaybar Supermiata swaybar endlinks Energy Suspension urethane bushings Sadfab offset front lower control arm bushings Supermiata brake lines G-Loc R18/R12 brake pads. OEM 94-00 1.8 calipers Centric blank 94-00 rotors Motul RBF600 brake fluid Singular Motorsports 5pc hood louver kit Singular Motorsports AeroWing -APR GT250 airfoil, APR endplates cut down to <12” length. DiY Alumalite front splitter, 4” blade DiY HDPE plastic airdam CCP Fab OEM shape hardtop. DiY poly rear window, 1/8” DiY poly front windshield, hard coated outer, anti fog inner. 1/4” 15x8 949 Racing 6UL with 205/50/15 Hoosier R7 15x9 949 Racing 6UL with 225/45/15 Maxxis RC-1 |
Sounds like a riot. If it turns out to do well in ST5 might be copying this for 2019. Although I'd probably just run 6spd / 4.1 since that's the f/d I already have laying around. Is that 143whp avg? (assuming yes). That's about all I make peak on e85 currently :(
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Originally Posted by cabowabo
(Post 1497818)
Sounds like a riot. If it turns out to do well in ST5 might be copying this for 2019. Although I'd probably just run 6spd / 4.1 since that's the f/d I already have laying around. Is that 143whp avg? (assuming yes). That's about all I make peak on e85 currently :(
I've never loaded it though. I ran the Supermiata S2 map all year. 139 peak and only 7000rpm, and it has already proven to do very well in ST5. The only car as fast as mine will podium, if not win Nats. |
Originally Posted by doward
(Post 1497828)
143 peak on my 'hi power' map, equates to 138 NASA Avg.
I've never loaded it though. I ran the Supermiata S2 map all year. 139 peak and only 7000rpm, and it has already proven to do very well in ST5. The only car as fast as mine will podium, if not win Nats. |
1 Attachment(s)
Originally Posted by doward
(Post 1497704)
I drove it tonight. Man. It rips. 6spd and 4.3 is a hoot. The car is a rat, and my buddy Dave, the previous owner, would absolutely love its current config. I am more excited to drive this version, than any previous version of Button, including the 2016 NASA Championship engine with the fancy OsGiken. 143whp ~2000lbs (2200 with me in it) bunch of cool shit |
Originally Posted by doward
~2000lbs (2200 with me in it)
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https://cimg5.ibsrv.net/gimg/www.mia...0dbb7a019.jpeg New door stickers. Moarange. Button is loaded in the trailer next to Vegas. This is my 4th trip to M@MRLS, and the first in which my own car will be there. I am pumped. https://cimg2.ibsrv.net/gimg/www.mia...54e7394df6.jpg |
Originally Posted by AA-Ron
(Post 1498267)
The things I would do to only weigh 200lbs ready to race!
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"Bike racing isn't a sport. It's a really expensive eating disorder."
-One of my Cat 2 friends back in the day. |
Miatas at Laguna Seca 2018.
https://cimg4.ibsrv.net/gimg/www.mia...bae18526ca.jpg https://cimg5.ibsrv.net/gimg/www.mia...c295379173.jpg |
times?
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Originally Posted by MiataMan00
(Post 1502093)
times?
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Like Fast Fast or Miata Fast?
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Fast is relative.....so not sure what that equates to.
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I heard he ran a 1:33
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ima go with a no.... (its not working Aidan lol)
If someone wants to inform me as to why lap times are confidential im all ears. Unless he just wasnt timing which would be weird. |
Originally Posted by 90LowNSlo
(Post 1502119)
Like Fast Fast or Miata Fast?
Originally Posted by aidandj
(Post 1502157)
I heard he ran a 1:33
Originally Posted by MiataMan00
(Post 1502158)
If someone wants to inform me as to why lap times are confidential im all ears. Unless he just wasnt timing which would be weird.
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Originally Posted by doward
(Post 1502253)
It's not confidential, its just HPDE.
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Originally Posted by Midtenn
(Post 1502415)
But did you win at track day!?
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Why is there a Lexus on display at "Mazda" Raceway Laguna Seca... ? ?? |
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Originally Posted by Efini~FC3S
(Post 1502566)
Why is there a Lexus on display at "Mazda" Raceway Laguna Seca... ? ?? I believe the official name is Weathertech Raceway Laguna Seca presented by Lexus or some such shit. |
Ahhh...for some reason I thought Mazda had it until the end of the year. |
Found a better post to make a stupid comment
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A failed valve cover gasket caused a big ol’ mess at Laguna Seca. So, a fresh OEM Mazda piece was installed tonight. I discovered a broken coil pack mounting bracket, so I had to swap in my last known-good spare. If it brakes again, I’ll be forced into a TSE CoP upgrade, clearly. Totally. Also on the list was to cut and fish out the hood catch loop. Grams yo. Racecar weight weenie-ing continues. https://cimg1.ibsrv.net/gimg/www.mia...4bfaeac7f.jpeg Also: Don’t Suck covering my worthless oem speedometer. (4.3/6spd) https://cimg5.ibsrv.net/gimg/www.mia...3d794b868.jpeg |
Not sure if this question is suitable in this thread..? (or even confidential).
Is the splitter length in the various photoss of 949 cars one decided upon by performance or one decided on via rules? i.e. we run quite a bit longer (approx double what I see here, if not slightly more) and wonder if this is just more drag for little benefit.... |
Most rule sets limit us to 4”. In US club level racing, aero is seen as dark art and really exspensive. Rulesets either simply don’t allow aero mods, or severely limit the allowed aero mods. We set the Supermiata S1 class aero rule to match the “norm”, as it’s a common figure and helps class to class crossover. The book “Competition Car Aerodynamics” references nascar/StockCars and 5” as the point of max efficiency in that application. In practice, if I was allowed 5”, I’d probably end up needing two splitters, as my car is fastest currently with the wing at zero or negative AoA. One for slower tracks and a smaller one for faster tracks. More splitter requires more wing to balance, and more drag. My horsepower level doesn’t approve of any more drag. More power means drag is less of a concern, generally. 949/Supermiata cars built to more open rulesets have used splitters as deep as 10” and wider than the track width. |
I read that book but didn't see the NAscar 5" info, will have to check again.
Thanks for the info. Presumably 300 - 350 whp is what you have in mind for the running of more than 4-5" of splitter? I tried a 3" at Pukekohe (high speed, 5-6th gear turn 1) and had a big, sudden front lose, so very quickly dropped that low downforce philosophy :) May need to revisit. |
As Dan clarified, S1 aero was designed with a clean sheet of paper. Compatibility with other classes, a useful adjustment range plus or minus, and also relative toughness when the driver chucks it off track now and then. The other constraint was also a desire to remove any "secret sauce" from the build recipe. While it's sexy to have some highly functional flat bottom and diffuser, very few DIY Builders know how to put one together cheaply. The rear wing is clicking a button on Singular Motorsports website. The basic front we do is highly documented so even a noob builder can cheaply put one together with basic tools.
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Sonoma was a blast. Bucket list track. Years of Forza/Gran Turismo paying off in real life.
Car was hampered with an oiled clutch from a failed valve cover gasket that shut down my 2nd day at Laguna. My attempts at R&R, cleaning and scuffing between events were unsuccessful in recovering the torque capacity. I was forced to tip toe around at about 80% throttle or it would slip in 4th or 5th gear. So I set pressures in the RC1s once on Saturday and never touched the car again. I took the ST5-spec Hoosier R7s, but never bolted them on. Spent my time on track harassing the SPM S2 guys and had several dicing sessions with Jeff Ringer and Erin Kennelly. I'll try to get that video chopped up on its own, as bumpdrafting is always fun. Several 1:55's on predictive that bled away on the uphill dragstrip from T6 to T7 because of the clutch slippage. Late on Sunday the RF hub called it quits. A 10 hour tow probably makes Sonoma a once-every-couple-years destination, but I can't wait to go back. All in all, super fun HPDE on a super fun track. https://cimg7.ibsrv.net/gimg/www.mia...a4d9944c34.jpg https://cimg6.ibsrv.net/gimg/www.mia...7d876beb03.jpg https://cimg5.ibsrv.net/gimg/www.mia...577af6b36f.jpg To do: RF hub replacement Cylinder head swap new clutch disc Dyno appt Continue dropping weight |
Can you please explain for the slow folks (yea, see my handle)....How's leaking VC causing clutch to slip since anything leaking form top of the engine can't enter the bell housing.
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Originally Posted by 2slow
(Post 1504314)
Can you please explain for the slow folks (yea, see my handle)....How's leaking VC causing clutch to slip since anything leaking form top of the engine can't enter the bell housing.
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Originally Posted by shuiend
(Post 1504422)
can leak down the back of the head then between the bell housing and block.
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Originally Posted by 2slow
(Post 1504440)
I've taken transmission off only once and don't remember there any major openings except for the starter, but even that one appeared well protected.
Stuff that can ruin the transmission disc: Valve cover gasket CAS o-ring VVT banjo crush washers Rear main seal, engine Front seal, transmission |
I appreciate the information and see that my assumption was incorrect. I completely trust what you are telling me because you guys do have so much experience. There is a lot I have yet to learn.
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Originally Posted by emilio700
(Post 1504451)
Experience with one transmission R&R versus a race team that has done a few hundred.
Stuff that can ruin the transmission disc: Valve cover gasket CAS o-ring VVT banjo crush washers Rear main seal, engine Front seal, transmission crosses fingers (may have waited a hot minute before I fixed that ish) |
I am scratching NASA Buttonwillow off my calendar. I could have done a quick cylinder head r&r and shipped it to the dyno, but I would rather take my time and do a few extras 'while I'm in here'. My psuedo-Supermiata-whammy, Keegan Engineering built BP4W head has arrived. I was greedy and asked Mike to give me the "80/20". I needed 80% of the gains, and wanted to spend 20% of the money. What he, emilio and I came up with was as such: https://cimg2.ibsrv.net/gimg/www.mia...6431bdcadc.jpg Non-CNC-Supermiata/Keegan Engineering ported BP4W -Valves de-shrouded, blended -Bowl work and plunge cuts blended out to the valve guides on the intake side. -Exhaust ports fully hand ported from bowl to manifold -Casting flash and core shift ridges knocked down, but not totally smoothed out, remember 80/20) Supertech +1mm valves Supertech Light Double Valve Springs Stock BP4W lifters Skunk2 throttle body Mazda BP5A intake cam Mazda EUDM/JDM squaretop intake manifold(I'll be porting this to match the S2 TB diameter) https://cimg4.ibsrv.net/gimg/www.mia...76f17d7dad.jpg https://cimg5.ibsrv.net/gimg/www.mia...8872d941e6.jpg https://cimg6.ibsrv.net/gimg/www.mia...15a9f421b4.jpg 165whp is the goal. That will allow me to ballast up to the 2400lb (or 2450lb break-point depending on proposed rule change for 2019) and open up 225/45/15 Hoosier R7(257mm section width) Currently, parts and gaskets I forgot to plan ahead for are in the mail. My valve cover and intake manifold are at the powder coater. I am taking this opportunity to install an oil cooler and Supermiata Crossflow radiator, as well as correct my ducting situation and add a mesh grill to my airdam. |
Depending on how good your rings still are, I think you should hit 170whp on E85.
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Dang, 165+whp sounds nice. Assuming I venture to ST5 (highest possibility of current options) I'd like to do something like that + maybe Mazda 10:5:1 pistons and some bottom end bullet proofing. 170 peak on e85 with 6 speed and aero would be a lot of fun. Mo' power is also the only way I'd ever expect to hang at CoTA (or in general) with S2k, FT86, Bimmers, etc. Can't wait to see this setup action.
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Not much more power with bigger pistons and more compression. BP's are honey badgers WRT to compression. Don't need a lot regardless of what you are doing. Gains from bore are linearly related to bore increase, i.e, small.
Dan was smart to spend his modest budget on a good head build that will work for anything. With the demise of NASA PT, there is no reason to build a stock or "points" head anymore. He spent roughly 2.5x what an OEM head/(stock cam) rebuild would cost but it's future and over rev proofed. If you are in the bottom end and have the budget, by all means, 85.5's and 11.0:1. Otherwise just focus on the head. It would be cheaper to put big cams in it, make 185whp on a stock bottom end. Just gotta watch the revs on stock rods. |
I had planned to do a bottom end as well, Keegan has my core torn down and cleaned for whenever I'm ready. The $/whp ratio doesn't work for me, and the headroom/insurance cost of rods, fresh bearings, labor, etc just to end up using OE pistons is a non-starter for an N/A motor in an average-power rated class. So I cancelled that half of the project. That $3-4000 bottom end build goes back into my budget as a whole season's worth of entry fees, or a used rotrex...
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