m2cupcar

iTrader: (5)

The rise on the front in the last pic is all win. POWAH. Car looks badass.

psyber_0ptix

iTrader: (4)

Tanks! I still have a lot to learn.

One the way back from the track when everything was super hot it felt like I was dropping a coil or something. It would sputter and lose power. I pulled over, cycled the key and everything started functioning again.


I changed the plugs and they looked lean. Maybe the injector driver on the MS is failing intermittently? Anyway, I changed oil and drove around and pulled some logs with nothing eventful. Hopefully Vlad can confirm that things are relatively consistent.

On the way back, however, again, loss in power, but it didn't sound or feel like it was running on 3 cylinders. I'm wondering if the problem will simply manifest itself more frequently but more importantly I don't know what it is. The tach goes crazy, when this happens, however I'm grabbing the tach signal direct from MS.

Not really sure where to point fingers. Coils, MS Coil drive or Injector driver. My wideband also started drifting a bit so I will be ordering a new sensor and recalibrating.

Dyno day June 1, another track day June 20

miataman04

iTrader: (1)

Oh yeah! Can you tell a difference in the pedal with the new master set up?

psyber_0ptix

iTrader: (4)

Definite difference. Pedal feels stiffer and a slight bit more touchy; less stroke for the same amount of stopping. But I also switched pads at the same time. I wish I took care of the master swap earlier on to appreciate these brakes. During the track day I found myself braking later and later to the point where my limitation was my fear to trust the tires and pads. There's plenty more brake I haven't tapped into yet simply because I'm not at that skill level, and my tires were getting a bit worse after each session.

psyber_0ptix

iTrader: (4)

I found myself regressing into primordial noob soup and just figured I'd stay in my own thread.


Driving around I started to get misfires. More details can be found in the following thread:
https://www.miataturbo.net/megasquir...y-cycle-96868/

Lot's of things loosened up on track day. Now I have some new sensors coming in that are probably not needed. But good to have spares.
Vlad is revisiting my tune and commented that the car leans out a little mid range ever since I swapped from 2" piping. Also boost seemed to stabilize wheras before it seemed to struggle. He's working his magic and I hope to finally get some numbers in June or whenever dyno happens. Things have been feeling great with the car otherwise, I'm pretty happy with some of the pulls lately. Can't wait to see what e85 does.


Late June there's another track day. I've ordered some new RS4's to replace the aged VR-1's that are seemingly on backorder right now. Looking forward to learning more.

Also investigating a new traction control option so working to aquire new knuckles and ABS sensors. These won't be installed until next winter perhaps, but what a great time to test it out when I'm on softer tires on slippery roads.

ridethecliche

iTrader: (2)

The burn... I feel it.

18psi

iTrader: (76)

psyber_0ptix

iTrader: (4)

I got thrown off, I thought I had a vvt problem I never knew I had only to realize I don't have that problem. As though I don't know enough about my own setup despite constantly working on it.

I can't think this week.

ryansmoneypit

iTrader: (6)

It would be fun to meet up for a track day. Im ready, car is pretty much ready..

asellus

wee old post..

Did you have any torque numbers that the clutch held before slipping? Skimmed the thread and didn't see any mention of it.

The highest I could put down was 263wtq uncorrected on a Dyno Dynamics (so ~310tq on a dynojet) on my FM Level 2 clutch, which seems like a far cry from the 353 rating that clutch has.

psyber_0ptix

iTrader: (4)

I couldn't make sense of the plots due to slipping and I no longer have them in front of me. Last year it did 402whp/375 wtq on DynoDynamics. FM says their shop car with 406tq was fine with their FM2.

I'm on a work trip for a bit, but maybe new numbers in June using the 949 Twin disk.

Saving up for a KMiata trans kit or a new motor; whichever blows first.

matrussell122

iTrader: (1)

VVT with EFR7163 TS cough cough

psyber_0ptix

iTrader: (4)

I don't know. I only have one BP6D build left in my motivational bucket. It probably won't breathe enough with +1mm O/S valves to appreciate the 7163. I'm not revisiting the spare head since it's already built.

asellus

Oof, okay. Safe to say I've got other issues then. Time to take another look at that RMS. -.-

matrussell122

iTrader: (1)

Well standby for report we will find out how it does. Matt at hellafab is building my manifold now estimated delivery mid august. I still need valves though for the head so i may do +2 we will see.

psyber_0ptix

iTrader: (4)

I wish I went with +2 but I didn't know enough about how to handle vvt and the valve pockets and whether or not things will start to become an interference engine with Tomei cams.

Honestly this current setup still creeps on the side of insanity for me so the only reason for a twin scroll 7163 would be for e-cred as a Dyno queen. I'm trying to transition into more track stuff so ultimately my car will probably break before I have enough time under my belt to be competitive.

Again, I'm losing motivation with the BP ever since kmiata made the easy button available.

matrussell122

iTrader: (1)

Yea i kinda wish i went that route. Do you thing a TS 6758 would be better than the TS 7163. With the +2 valves wont i need to clearance my pistons also?

18psi

iTrader: (76)

100% agreed.
I don't think most people have any idea how nasty this car is at it's current power level. 400-450 feels NUTS in a miata

psyber_0ptix

iTrader: (4)

+1mm doesn't require clearance on most pistons, +2mm will.

It's still a 0.8AR for either twin scroll setup. But there is a bump in turbine efficiency with TS. It's still unknown. It would, however, be a better data point using a 6758 ts to bench against the 0.64A/R 6758. Right now, we still don't have much info on everyone running the 0.85A/R 7163 on miatas, unless I've missed it. I haven't looked honestly since I'm still trying to tap into the full potential of the t25 on my platform.

I find it harder for me to reach those ultra power goals. I work on the car when weather permits. I only got a driveway half a year ago. So getting to and over the 400hp bump has taken me a year and some from a stable 350hp pump setup.


In all honesty, twin scroll would simply be a bragging right right now. The stuff the two baby EFR's are putting out, is super drivable and delivers for most applications...im still struggling to figure out exactly how much more I (personally) would ever really need. 500hp seems a death wish until I gut and cage the car. 500hp would also be useless without fatter tires which currently do not fit.

psyber_0ptix

iTrader: (4)

Vlad had been working his magic and now wheels are spinning in 3rd when it's 90°F out. This car is way too bonkers for me. It has had some episodes of misfire which has been difficult to diagnose since it's so random and intermittent. Only on WOT and never presents during part throttle roll onto WOT.
​​​​​​
Changed spark plugs and gapped them down to 0.023", revisited old butt connectors, tinkered with all ecu connectors which seemed to help for a day. Vlad noticed in logs that the e% dipped drastically as rpms climbed which changed timing, boost, and fueling. I swapped the flex sensor to the supply side to eliminate false ethanol % drop at high rpm... But the misfire came back.


I was to drop the car off for some work this Thursday. Adjusting suspension new alignment and new Hankook Rs4's as well as some exhaust welding and adding a 4th hanger Shuiend had given me ages ago. I also booked some dyno time to finally see what she makes (without a slipping clutch). If we can't iron out the misfires by then, I'll push that off just so we have a solid car ready. I'll probably do a glory pull then seldom ever touch e85, or just blend it since this car is a hand full.