BillP

The title is tongue in cheek, but the thread is real. Let's help everyone by keeping the track timeslips in the Track Time Slips thread, and the accelerometer (GTech, GTimer) slips here.

Please follow this format:

Model (ex: Gtimer GT2)
Notes (ex: cold dry day, etc.)
Settings (ex: 12" speed and distance rollouts)
Mods

=======================
My best run to date:

Model: GTimer GT2
Notes: Approx 45degF. Cold and dry, making lots of power!
All settings factory (12" rollout, etc.)
1/4 - 13.27 @ 107.26
60' - 2.08 sec
330' - 5.67 sec
1/8 - 8.63 sec @ 83.49
1000 - 11.15 sec
0-60 - 4.8 sec
0-100 - 11.45 sec

Mods: SCT 91 octane flash with 6700rpm rev limiter, missing HC trap.
I moved my shift points up to about 6400-6500 rpm, as the car is still making power and torque hasn't dropped far enough to warrant a shift into a higher gear. My launch was hasty, so I spun my tires a bit too much. Made up for it down the road.

This is FAR better than my BEST previous run on the same street. That day was about 10 degrees warmer. That day I launched better, but my car has been making GREAT power in this California cold snap we've been having. Prior best run was 13.7 @ 100.95 with 0-60 in 5.05

Note to all: GTechs and GTimers tend to post a little optimistically due to a hefty 12" rollout. In addition, I have yet to determine if car magazines use rollout in their time-to-speed measurements (0-60). I'm certain they do for their time-to-distance (1/4 mile).

RAW figures, meaning they will always be slower than real track times (zero rollout) for my fast run would be 13.7 @ 108 mph. Track times are likely to be somwhere between the 13.3 and 13.7, let's call it 13.5 @ 107

The thing that I LOVE is the trap speed. It's SO much better than my previous runs. When the temps come back up and my speed falls, I am going to be a grumpy boy (grin).

max2000jp

Accelerometers aren't accurate in measuring trap speed. Your trap of 107 will be more like 103-104 at the strip

2005MustangGT

yeah, lets keep the make believe timeslips here, and the real time slips that someone has spent multi thousands of dollars on at the real timeslip thread....LOL
-It's funny that you can pretty much make your car run just about anything imaginable w/ 200 dollars..."gtech".
LOL

ManEHawke

I remember when the Mustang was said to have one built-in when you got the IUP, but I guess they don't have it. This was a really really long time ago.
I wonder how many more Gtimer people are out there?

BillP

2005MustangGT-

Cool it. I started this thread so you guys who have been to the track can keep from trash talking those who haven't made it yet.

My GTimer is going to post the same numbers as 2005RedGT's GTimer. So it's valid for comparison.

Max200JP- Can you tell me why trap speeds will be off? A technical explanation? Because there have been a few magazines and people who have calibrated their GTimers and GTechs and matched the trap speeds within 1mph and ET's within 0.1 sec.

The big difference is rollout. These units have a fat rollout that never changes (you can change it, but it's static run-to-run unless you change it). If I go to the track (as a newbie), I'll be all over the staging lights, shallow, deep, etc. until I get used to staging consistently.

So, I'd like the technical explanation for the difference in trap speeds. I understand the ET differences, and Ive been over this with 2005MustangGT. I bet my ET is off by .2 or .3 sec, he's measured 0.5 sec difference, probably because he's an experience, deep staging drag racer.

O5GT

2005MustangGT-

Cool it. I started this thread so you guys who have been to the track can keep from trash talking those who haven't made it yet.

My GTimer is going to post the same numbers as 2005RedGT's GTimer. So it's valid for comparison.

Max200JP- Can you tell me why trap speeds will be off? A technical explanation? Because there have been a few magazines and people who have calibrated their GTimers and GTechs and matched the trap speeds within 1mph and ET's within 0.1 sec.

The big difference is rollout. These units have a fat rollout that never changes (you can change it, but it's static run-to-run unless you change it). If I go to the track (as a newbie), I'll be all over the staging lights, shallow, deep, etc. until I get used to staging consistently.

So, I'd like the technical explanation for the difference in trap speeds. I understand the ET differences, and Ive been over this with 2005MustangGT. I bet my ET is off by .2 or .3 sec, he's measured 0.5 sec difference, probably because he's an experience, deep staging drag racer. [/b][/quote]
on the track the trap speed is the average speed over the last 60 feet, not your speed at the end of the 1320 or 660 marks...

BillP

Now that's a good answer (I'm a technical guy, so I really dislike answers without a reason).

My last 60 ft numbers are 13.34@106.4 at 1261 ft, to 13.72@108.0 at 1320 ft. That's raw numbers without figuring rollout. The average would be about 1 mph less than at the end of 1320 for this speed class.

My closest drag strip is Infineon, and the only racing they have right now is bracket drags. The cheaper and informal Wednesday Night Drags don't start until the Spring. I can go up to Sacramento Raceway, much further away, for Saturday Test & Tunes, but thats a haul and I'll eat up an important day with the family. So that's why I haven't made it to the track.

wild stray

Good run!

BillP

The one thing that this tool showed me in cold hard facts is that the common "wisdom" about best shifting at 5500 that is floating around here and Stangnet is NOT the best for this car.This car has a flat torque of about 270 lb-ft starting just over 2000rpm and staying there until about 3500 rpm, where it rises until it hits max around 4200, then drops gradually through factory redline.

To compare shift points, you have to take into account the loss of torque multiplication in second vs first gear. First is a 3.38 gear, second is 2.00, giving a 1.69 multiplication ratio. That means, roughly, that 270 lb-ft in 2nd has the same pulling power as 160 lb-ft in 2nd. The 05 pulls over 200 lb-ft through a modified 6500rpm redline.

By shifting at 6500 in the 1-2 shift, you are dropping to 3800 rpm in second, where torque is 280-290 lb-ft. Correcting for torque multiplication, you still haven't wrung out that gear "far enough" to make up for the 1-2 shift.

Moral of the story is that we need a hot spring/valve setup that can survive 7000rpm. The intake and exhaust are still capable of useful power beyond the 6200 rpm redline. I'm going to take mine to 6400 or 6500 when I want to max it out, and cross my fingers that my top end stays together.

max2000jp

on the track the trap speed is the average speed over the last 60 feet, not your speed at the end of the 1320 or 660 marks... [/b][/quote]
Thats the correct answer. I have used the GTECH a few times and its actually really accurate on the ET aspect of the 1/4. I found from my experience at the track and testing with the GTECH, that it isnt accurate on trap speed. For example, my Maxima trapped 95 mph at the strip, but the GTECH would constantly show my car trapping 99 mph on the street. From my experience, the GTECH is generous by 4 mph.

-FROG-

Well, I finally G-Teched my 05' after getting about 1100 miles on the Odometer. I used a G-Tech 1. Some of you may remember my G-Tech results from my Loaner (Dealer) mustang back in December. Alot of you laughed at those times so I will be expecting a few smart hiney remarks about these new times too.

Here in Austin Texas, it's pretty close to sea level. My friend from New Mexico tells me how much faster the track times are down here compaired to New Mexico because of the altitude. He tells me it can vary up to 5 tenths from the results on his 90 Mustang. Just useless information for some of you folks up north...


Loaner results in December:
Car had 1,600 miles on it. Temp was about 70 digrees.

launch RPM's, 0-60, 1/4, Speed (of course too high on the G-Techs)
1500 5.1
2000 5.3 13.7 110
1500 5.0 13.43 112
1600 4.9 13.27 113
13.58 111
13.66
13.53 113


I have been driving an 05' for about a month now and feel much more comfortable with launching. My shifting may have improved a bit as well but I have plenty of experience with ripping gears so I'm deffinately not new to this. My car did feel a bit sluggish when I first got it but it has deffinately come alive. I noticed it waking up around 600 miles.

Car had around 1100 miles on it and temperature was in the hih 40's (this makes a big difference from 70 digrees).

launch RPM's, 0-60, 1/4, Speed (of course too high on the G-Techs)
1700 13.05 112.6
1800 4.4 12.86 114.8
1800 4.6 12.96 114.7
1900 13.9 bad wheel hop, I had to let out.... bad run because of traffic

I went to pick up my cousin and came back with her about 30 mins later.
launch RPM's, 0-60, 1/4, Speed
13.2
1800 4.5 12.88
1800 13.1 (with her in the car)

I'll admit the times are crazy, but man that car will move in 40 digree weather, like it has a small shot on it!!! I'm heading to the track VERY soon and I'll be taking the G-Tech along with me. I need to find out what I can do at the track, so I'll let you all know soon.

On a side note... My just friend ran his beater 97' V6 Camaro a few days before I ran my 05' and his car ran low 16's and high 15's. This is about average for those cars so I know the G-Tech hasn't fried just yet!

DozerzPony

I ordered my GTech R/R last month from Jegs and should finally be getting it next week...can't wait to post mine.

-FROG-

Let us know your results

DozerzPony

Per FedEx, supposed to be here today.....we will see!!! Should be interesting because I am getting my car true dyno'd next cupl weeks, will compare results. I am very excited.

DozerzPony

OK, got it finally. Only question is what did you guys use for vehicle weight on GT with manual tranny and full tank of gas. I don't have a scale close by and don't want to use the door sticker.

I will add my body weight to the number you guys give me.

Thanks!

BillP

I don't use the weight feature. That's only used to calculate horsepower, and it's wildly inaccurate.

DozerzPony

ok. first time so don't laugh....haha

-FROG-

You had one decient 0-60. Where are your 1/4 mile times?

DozerzPony

Good question. I will try that next...The GTech does so much, I was just anxious to get anything posted asap.

...to be continued!!!

-FROG-

LOL! I hear ya!

I would assume, if you keep going to the 1/4 mile, it will record your time. Like on my G-Tech1, if you slow down after the 0-60, it will only record the 0-60, but if you proceed hauling hiney through the 1/4, then it will show the 1/4 mile time.