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Race Prep Miata race-only chat. 949 Racing - Rim & tires

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Old 02-29-2016, 05:13 PM   #681
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I've seen people try to run the alternator current through the circuit designed for the ignition coils on the 6-post Genesis I use. They don't last very long, as you might imagine.
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Old 03-01-2016, 11:41 AM   #682
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99 plus cars can kill with the alt excite wire located on the shelf near the RR. Grey with the red tracer if I recall.
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Old 03-10-2016, 10:22 AM   #683
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Heading to Road Atlanta this weekend, field is a decent size in TTE.

So if SM cars are doing things like this:



In theory my TTE car should do at least that(weather permitting), but actually faster.... I really wish I had Kohler's build on my car, I could REALLY use that extra 10hp on this track Over the past 2-3 years the fastest TTE times regionally have been 44.9s.

This will my first time out at Road Atlanta with R7s on my car, so we'll see if I can put together a good lap.

Last edited by flier129; 03-10-2016 at 10:49 AM.
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Old 03-10-2016, 11:45 AM   #684
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Quote:
Originally Posted by flier129 View Post
Heading to Road Atlanta this weekend, field is a decent size in TTE.

So if SM cars are doing things like this:


In theory my TTE car should do at least that(weather permitting), but actually faster.... I really wish I had Kohler's build on my car, I could REALLY use that extra 10hp on this track Over the past 2-3 years the fastest TTE times regionally have been 44.9s.

This will my first time out at Road Atlanta with R7s on my car, so we'll see if I can put together a good lap.
An extra 10hp is always nice! Best I ever ran at Road Atl was in 2014 nationals in PTE. PTE* dyno reclass back then. 1:43.5. Near 100F temps though. Certainly not a perfect lap either, I'm a Road Atlanta newb. I'd imagine you should be able to run faster than that especially if the weather is nice and you're making close to your hp limit.

The SCCA trim spec miatas on hoosiers are nuts. You can look up March Majors results for the last couple years, and best qualifying times are routinely in the high 1:42s. Granted, they're drafting no doubt, which we you can't do in TT. :(

Good luck this weekend! Let us know how it goes!
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Old 03-10-2016, 12:23 PM   #685
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I would set my target at 1:40.5 in cool weather, no draft with an optimized NB1 PTE car for RA, 39.8 with a few drafting partners. 15whp more, 20lbs more torque below the torque peak rpm, much better gearing, diff and suspension.
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Old 03-10-2016, 01:06 PM   #686
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Ran last weekend in TTE. 1st of 6 on Saturday and 1st of 5 on Sunday. Xidas and delrin bushings are awesome.

Set a new track record by over a second, old record was a 1:05.8 that has stood since 2013.

MCE dyno showed up unannounced, but the random number generator swayed in my favor and I pulled 131WHP and my cap is 136WHP. I did 133WHP on the local dyno. No idea what's going on there.

I think the car is just about as good as it's going to get as a dyno reclassed NA.

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Old 03-10-2016, 03:38 PM   #687
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Quote:
Originally Posted by speedengineer View Post
An extra 10hp is always nice! Best I ever ran at Road Atl was in 2014 nationals in PTE. PTE* dyno reclass back then. 1:43.5. Near 100F temps though. Certainly not a perfect lap either, I'm a Road Atlanta newb. I'd imagine you should be able to run faster than that especially if the weather is nice and you're making close to your hp limit.

The SCCA trim spec miatas on hoosiers are nuts. You can look up March Majors results for the last couple years, and best qualifying times are routinely in the high 1:42s. Granted, they're drafting no doubt, which we you can't do in TT. :(

Good luck this weekend! Let us know how it goes!
43.5 in 100* heat is encouraging. Honestly be happy to do anything in the 43s. I'm a 99 points car, 135rwhp-ish @ 2410lbs, stock ECU with an older DPtune reflash(from the STR days)949 big-grip(in need of 800/500 springs though) 15x9s, 205 R7s, no aero. So I'm down 10hp from the cap.

Quote:
Originally Posted by emilio700 View Post
I would set my target at 1:40.5 in cool weather, no draft with an optimized NB1 PTE car for RA, 39.8 with a few drafting partners. 15whp more, 20lbs more torque below the torque peak rpm, much better gearing, diff and suspension.
I need that hp/tq, 4.77 OSG, and I could be getting closer to that time. Current record is 43.14 from an Integra.


Seems like T1 and T7 are key, especially T7 in the miata(coming onto back straight.)
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Old 03-13-2016, 06:41 PM   #688
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Looking to see if anyone has run the 99 cali manifold with a custom downpipe?

Thoughts are running a 4 bolt setup 3.5" down to 2.5 running to the catback... Thoughts?
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Old 03-13-2016, 10:17 PM   #689
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Back from Road Atlanta. I didn't go fast enough and got beat by a Sentra and Espinosa(se30 champ) driving a TTE trim E30. I need more power!!! but really, I just need to grow a set... brake later and get on the throttle sooner.

I managed a 1:45.648 and I honestly can't remember the temp that session. I do remember it had some overcast and probably around 75*

Results, check the split between 2nd and me

Jim Pantas = Team Parkhurst, Espinosa drives with them. National tier driver > the rest of the TTE field


I'll be uploading video later of one of my sessions. Would like some feedback on a few things if some of you kind gents wouldn't mind to comment




Quote:
Originally Posted by blkmkiii View Post
Looking to see if anyone has run the 99 cali manifold with a custom downpipe?

Thoughts are running a 4 bolt setup 3.5" down to 2.5 running to the catback... Thoughts?
I'm thinking about doing something similar as well.
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Adventures in PTE/TTE-5uteafdl.jpg  
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Old 03-13-2016, 10:28 PM   #690
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Not too shabby of a split time.

I was .005 off the track record at the next track we are visiting. A heartbreaker and a motivator since that was the first time in my miata at that track a few months back
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Old 03-14-2016, 10:32 AM   #691
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Here's one of my laps from this weekend, 2nd fastest of the day 1:46.0xx, I didn't get my fastest on video, which was 1:45.648



Is my clutch slipping? Seemed like my clutch was slipping while shifting 3rd to 4th..... 4th or 5th seemed fine though. It's a 1.6 OEM replacement.... I need an upgrade.

I'm bottoming out bad in T1, currently on 700/400 so I need 800/500 pretty bad.(RB front bar/14mm rear)

I need to consistently brake later for T10, I think I'm losing a lot of time there. Am I over slowing for T7(before the back straight)? I haven't looked at all my data, but I did T2/3 in 4th on Sunday and it felt a lot faster... spent less time getting the car into 3rd and was able to concentrate completely on braking/line/back on throttle.

Feedback is greatly appreciated!
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Old 03-14-2016, 11:56 AM   #692
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Such a nice track! Turn 10a, you could just do 1 late downshift, from 5th to 3rd, and one big blip. And yeah, a big set of ... is definetly needed at this track... lol
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Old 03-21-2016, 02:56 PM   #693
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Itís a pretty great feeling typing this up after following this thread for 3 years and dabbling in TTE with my NA.

My new build for 2016 is a NB1. I bought it as a weekend street/DE car from a buddy. I simply gutted it and had a cage installed, then I transferred my seat/belts/steering wheel/ Xidas/MSM rear sway/endlinks/wheels/tires over from my NA.

First event was a three region crossover at National Corvette Museum Motorsports Park in Bowling Green, Kentucky. I plan to run in PT this year but my Schroth HNR Flex, fresh harnessí, and shoes are still on backorder and I didnít have time to wire in my killswitch, so I ran just in TTE.

This is a new track for me, but the car felt extremely familiar being all my previous mechanical bits/setup.

As it sat for this event:
TTE* @ 117whp/2115lb, actually scaled at 2331 Sunday morning when I was the lowest on fuel.
800/500 Xida +5
RB/MSM sway +2
SM6 +1
Sport brakes +2
Total: 17pts.

The TT record was pretty soft @2:28.x since none of the faster PT guys double dipped last year. I think Aaronís PT record is down in the 2:22 range.
I reset the record in session 2 to 2:26.109, again in 3 to 2:24.337.

Won a couple Hoosiers on Saturday but only managed second in the rain on Sunday to a mk5 GTI on Conti DWs. I was within a tenth in raw time on Sunday but DQíd my two fastest sessions trying to catch him.

I flat spotted all four SM6s being a dumb in the last session Saturday and ran Sunday in the all-day rain on some hand-me-down scrub H20s.

With my winnings, Iím thinking of going SM7, stock brakes and swapping over my 4.77 Giken:
TTE*
SM7 +2
Xida +5
Sways +2
LSD +3
Total: 19pts

Next events are Mid Ohio x2, Gingerman, maybe back to NCM if I am in the hunt for points. I know the diff is worth a bunch of time at NCM based on this weekend and Mid O on my own experience. I havenít driven Gingerman with an open, just a Torsen, but I canít imagine it being a detriment.
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Old 03-21-2016, 03:05 PM   #694
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How can you afford the sways? Did they recalculate the tires for the 2016 rulebook?
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Old 03-21-2016, 03:07 PM   #695
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He's running SM7s instead of R7s.
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Old 03-21-2016, 07:39 PM   #696
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Quote:
Originally Posted by Dunning Kruger Affect View Post
How can you afford the sways? Did they recalculate the tires for the 2016 rulebook?
I cant break it down much more than I did. I can currently afford the sways since I'm on an open diff and SM6s. This leaves me with 2 points left on the table and the 2 brake points are pretty much a waste.

Near-future goal setup includes removing the brakes(-2) to fit SM7s(+1 over SM6) and a diff(+3), to bring me up to the 19 point cap.

Jeff is pressuring me into stock sways and R7s over sways and SM7s but i currently love the way it handles and don't want to risk it :(
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Old 03-21-2016, 08:52 PM   #697
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I thought Xidas were 5 points by themselves due to the shaft diameter. Where are your points for springs?
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Old 03-21-2016, 09:11 PM   #698
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I don't know what Xidas you got.

https://www.google.com/webhp?hl=en#h...40mm+in+inches
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Old 03-21-2016, 09:15 PM   #699
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He's probably confusing the rule about shock shaft size being greater than 40mm and the spec for the xida piston being 46mm.

Xidas are 5 points total.
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Old 03-21-2016, 09:19 PM   #700
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Where are you from?
I'm in Indianapolis, planning on working on getting all the nasa hpde sessions done this year and run tte or ttd next year. I'm running a NA with vvt swap but I just dynoed at 152hp/130ftlbs, so it will really have to be detuned for tte. What do you recommend I do?
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