182 STU - Shane Donahue
Found some handling problems with the car... i'll take another stab at it this winter, and hopefully come out swinging next year.

 

Scott, Glenn, and Shane, it was nice to meet all of you.

I'm pretty sure that we were all running data and I would like to compare notes. Particularly the cars' fastest runs from the day 1 course.

It had a rather long acceleration point starting from a low speed corner. (along the orange net/fence)

IIRC: We have the following data points that I think can be compared well on that point of that track.

HR Z with OS Giken diff
HR Z with Wavetrack diff
DE Z with OS Giken diff
DE Z with Quaife Diff

I'm assuming we all have decent tunes. (I don't have headers, but I don't think that makes a huge power difference)

If any of you want to share, please PM me an email address that I can send my fastest run to (exported from Solo Storm)

I will send you my fastest run (+ everyone else's?) and You can reply with yours.

While most of this sport is about the driver, I think this "straight" was sufficiently simple enough that, (assuming we didn't go crazy-wide exiting the tight turn before the straight) we all ended up floored at that point on course.

This data might show the Z community differences (or lack thereof) between the different setups as it pertains to getting the rear tires to hook up and the car accelerating.

Thanks guys.

BTW, I forgot to mention where I ended up. I sometimes forget that people come to build threads to see what others are doing with their car and, in the case of a track build, how the build performs.

I ended up 12th of 36 drivers, about 0.16 seconds out of the trophies. (total/two days)

The car was easily fast enough to get into the trophies, but I just failed to put it together.

 

I'm down for Data sharing. **** you guys can have all my runs, doesn't bother me.

West course runs
https://drive.google.com/folderview?...GM&usp=sharing

East course runs
https://drive.google.com/folderview?...Tg&usp=sharing

It's mine (Shane) and my Co-Driver (Dave) in solostorm format. My tablet autosyncs them to Google Drive when i park at home.

 

Thanks, do you remember which ones were the fastest for each course? (I know the 10hz GPS isn't quite as accurate as the laser timers.)

*edit* just looked up the results...

 

After quickly looking over data from Shane's fastest runs and my own, here's what I see:

Cars/setup: Shane's car is an HR with a Wavetrack diff, mine is a DE with a Quaife

Under full throttle, I see no notable acceleration differences *until* I hit my 7k rev limiter at 63.2MPH and Shane continues to pull to 67.3MPH. Shane, your RPM data isn't showing for me so I'm not sure where your redline is. It only cut his time by 0.050 seconds since he didn't get to hold that extra speed for any amount of time on this part of the course. (Plane side course)

FWIW: I just went back and found my post-tune dyno sheet and it shows 234HP on a Mustang dyno.

The primary difference I saw on both courses was peak lateral G's
Shane's car pulled 1.35G's on the plane side course where mine peaked at 1.24

On the corn side course, he pulled 1.4 and I pulled 1.36.

I knew I was running conservative camber (2.5 rear and 2.75 front), but it seems to have hurt a little more than I expected.

Shane, what camber settings are you running?

 

I don't log RPM data, as it uses some of the refresh rate off the OBDII logger. I'd rather have a full 10-12Hz update of my throttle data than 5-6hz of both. Gearing top speed should be 69mph, at the stock redline of 7500rpm. We never hit redline, until west course finish chute.

I clocked 278 on a mustang, before doing LTH, exhaust, etc.. but i think i injured my clutch at spring nats. When we hit off season i'll pull the trans and check it, but it feels like it's slipping higher in the range. Either way, the car is still untuned.
Currently running -3.2-3.3 in the front and -2.9 in the rear. I'd run less in the rear if i could, but ride height and toe dictates where that has to be.

There's a lot of tweaking in the offseason. The car doesn't inspire confidence at the limit, and Lane Borg took it for a few runs at the solo trials and pointed out a weird bouncing issue that i had never run across.

 

Thanks for the info and the data Shane!

Hopefully Glenn and Scott will share too.

 

Here is a link to my two best runs for solostorm.

Scott 1 is west course
Scott 2 is east course

Had a fun time meeting everyone. Great group of Z's.
DE- DC headers, hiflow cats, intake tube, Mustang dyno tune at 238HP.
OS giken diff.

Camber 4.1 front and 2.6 rear. That is what the RS3's seemed to like, I think with the RE71 stiffer sidewall I can pull some of the front camber out.

https://drive.google.com/folderview?...Vk&usp=sharing

 

Thanks Scott!

Nothing is jumping out for me for acceleration. You seemed to accelerate slightly better out of the dig on the east course, but we were almost identical for the drag-race finish on the west course. -Although you leveled off at 62.4mph at the finish and I grabbed 3rd and topped out at 71.8mph. (was probably around 68-69 mph at the lights)

I don't have your throttle inputs, so it's possible you were unable to floor it at that point. However, looking at your speed curves, you seem to do a good job of positioning the car and getting on the throttle early, so if you were out of position for the day two finish, it would be a surprise.

Our east course runs were almost carbon copies until the last 4-5 turns for the finish. You consistently held more speed through that last section and took care of business. Nice driving.

Peak lateral grip was similar. (on day one at least)

Day one, you were at 1.28 vs my 1.24
Day two showed a notable difference though. You were at 1.26 and I was at 1.36. Does your G meter compensate for roll/incline? Mine just adds G's when the car leans for any reason.

The consistency of your G numbers between both days seem to indicate that you are using something better than run-of-the mill accelerometers found in an average tablet.

There do not seem to be any notable differences in acceleration between our two cars that a data-logging layman like myself can nail down.

 

I am just running a nexus 7 tablet, so whatever is in it for accelerometers is it.
I usually don't use the g meter info. To many variables unless it's the same car,tablet, location....

Overall I thought the same things looking at the runs. I do drive a slow in fast out style, that works sometimes and it hurts me in others.
The day 2 dig to the finish was ok on that run. I remember just a bit of a slip but over all ok.

Hope everyone has a good fall to finish up the season, see y'all next year.

Cheers - Scott

 

One day, I'll join in on the fun...

 

Day one final run. Fail

 

^ I'm jealous of your HR's powerband and revs.

 

thats all and good if we could of used the power. 1200lb rear springs = fail

 

Any chance of getting data from the fastest runs?

So far I have not found a notable acceleration advantage between Scott's tuned DE, Shane's un-tuned HR, and my tuned DE.

Your Z was able to put down faster times than the three examples I have looked at so far.

 

Good afternoon!

Just stumbled across this thread (been a while since visiting the forum), but I am Ray Wise and I had Jason Daily as my co-driver. The car was put together over Feb/March this year and started running in April. Typically bounce around IL and neighboring states for events (met Shane in Milwaukee this summer). It was good to meet many of you last month.

I am game for sharing some data once I get it off my broken phone (dropped at Nationals).

But here is some of the specifics for my car:

Car: 2004 Touring

Suspension:
Valved Konis
- Running a lot of front rebound and very low compression
- Running mid rebound and low compression
1100# front springs
700# rear springs
Hotchkis front sway - one of the middle
Whiteline rear sway - soft
Kinetix front arms
Bushings through-out

Alignment:
-3.25 deg front camber --> Actively working for more, would like to get 3.5 to 3.75 if possible but may require a change in front arms/ride height
- 2.25 deg rear camber --> based on temps, likely need about -2.5
0 toe all around
Rake, 0.5" to 0.75" taller in the rear (25.75" front height, 26.25-26.5" rear height) --> looking to drop to even, the rear has been loose powering out of corners.

Drivetrain:
- OS Giken rear diff with bushings (no tune, using as it came out of the box)

Engine:
- Cold air intake and upped rev limit to 7100 rpm but no true tune completed (rev limit upped Monday of nationals, learned my lesson in Wilmington)
- Stock exhaust and engine/trans mounts

We typically compete on baked asphalt or broken up concrete. I had to do a lot of adjustments at the TnT in Wilmington because of the massive amounts of grip and finalized my "Lincoln Setup" at Grissom north of Indy before Nationals. Overall the car performed very well and was confidence inspiring for us compared to how it had been the couple months leading up to Grissom, but we did have issues with low speed mid-corner push and issues putting power down exiting corners (I don't think our issues were as prevalent as some others). Outside of weight reduction and power additions, our true problem is behind the wheel.

Hoping the next couple of weekends on broken up concrete will continue our adjustments going into next year.

 

I do not have a datalogger unfortunately but the fast times were definitely my codriver Nick

 

I think those have gyro's in addition to accelerometers. That might explain the difference. (My Note 8 just has the accelerometers.

Great!

Crap. I thought you guys were looking at a tablet in between runs at test and tune. (Might have had nothing to do with driving though....just assumed it was Solo Storm.)

In other news.... I recommend NOT shaving the RE71's. Darren Seltzer said he talked to another driver that tried shaving the RE71's and went back to unshaved. -Said the shaved RE71's felt "greasy".

Mine don't feel greasy, but the shaving left the outer edges untouched and they are only now starting to look worn-in on the edges. Shaving 2/32's off left almost a half inch untouched at the edges. I think it may have contributed to the "snappiness" I was feeling at Nat's.

The tire felt great until I really leaned on them, then they went from great to SNAP!

As they wear in, I am getting more comfortable, but I still don't drive these tires as well as I did the Kooks, Rivals, or even Star spec's.

I'm faster on these tires by default because they have so much more grip than any of the real street tires I drove on before, but I still don't feel like I'm accessing their full potential.

 

The star specs are easier for me to drive too. They do not squirm as much as the stones do IMO and are much more responsive to steering input. However they do not have the lateral grip the stones have and are a tick slower on pace. I have a mint set of 285/30/18 ZII star specs I am not going to be using with about 30 runs on them

 

probably the final run in the car this year. it was cold and struggled with tire temps. Not having a codriver made it more challenging. However I am extremely happy with the balance of the car now. I think we made a change in the right direction since Nats.