anyone have a datalogger?

cossie1600 · 04-28-2011, 08:34 PM

Anyone have a datalogger they use on the track? I am looking for a few info, thanks

sig11 · 04-29-2011, 11:57 AM

I used Harry's Lap timer last weekend on my iphone. It performed fairly well I think considering it's price. The iphone is fairly limited by the max 1Hz sampling rate for the GPS though.

I would like to talk a friend into loaning me his Traqmate one of these days... he has yet to use it since he had a wreck shortly after buying it.

cossie1600 · 04-29-2011, 12:33 PM

i need to know what people are pulling under braking in terms of g"s. i am trying to see if i can get more details on it. unlike many, i still dont think temperature is a big factor in ice mode. maybe on stock pads, but it changed nothing on race pads

handyman · 04-29-2011, 04:47 PM

I'll be using the Trackmaster app on my Droid at an autox this weekend (same 1hz gps limitation as the iphone). If the data would be useful to you I'll post it up

cossie1600 · 04-29-2011, 05:01 PM

cant hurt to try right, thanks.

bezzita · 05-17-2011, 03:35 AM

There is a new program for iphone and ipad: Welcome to Harry?s GPS LapTimer

I just did a quick test last Sunday

It works...

but next time will be with proper Ipad 2 holder!!!

handyman · 05-17-2011, 10:35 AM

Forgot to post that the droid app was basically useless for autox, the 1hz sample rate was nowhere near fast enough.

ChrisSlicks · 05-17-2011, 10:44 AM

Quote:

Originally Posted by cossie1600

i need to know what people are pulling under braking in terms of g"s. i am trying to see if i can get more details on it. unlike many, i still dont think temperature is a big factor in ice mode. maybe on stock pads, but it changed nothing on race pads

Overall temperature isn't a problem based on what I've logged, just temperature affecting the brake balance. I never get ice-mode on track, but at auto-x I do unless I keep my front brakes cool. High bite pads make it far worse.

cossie1600 · 05-17-2011, 01:53 PM

Temperatures might contribute to the problem, but I verified that it is not the only way to experience it. I left my XP10s on the car after my track day. I did one autox at a smooth lot, it was fine. I did one at a 40 years old lot with virtually no grip and wavey pavement. The car basically hit ice mode at every single corner. It didn't matter if the car was hot or cold, it just got into ice mode at every turn. To make matters worse, the car would jump in and out of ice mode even if you didn't hit it initially. It was a scary experience

ChrisSlicks · 05-17-2011, 02:43 PM

Quote:

Originally Posted by cossie1600

Temperatures might contribute to the problem, but I verified that it is not the only way to experience it. I left my XP10s on the car after my track day. I did one autox at a smooth lot, it was fine. I did one at a 40 years old lot with virtually no grip and wavey pavement. The car basically hit ice mode at every single corner. It didn't matter if the car was hot or cold, it just got into ice mode at every turn. To make matters worse, the car would jump in and out of ice mode even if you didn't hit it initially. It was a scary experience

Yes, I've experienced the same thing in low grip situations such as a little bit of loose sand on the road or on low grip tarmac with track pads installed. The way that it bounces in and out is most disturbing as you know it has the potential to stop, but for whatever reason it keeps backing out in an attempt to either give more steering potential or readjust itself.

04-28-2011, 08:34 PM	#1 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	anyone have a datalogger? Anyone have a datalogger they use on the track? I am looking for a few info, thanks

05-17-2011, 03:35 AM	#6 (permalink)
bezzita Base Member Join Date: Jul 2009 Location: Melbourne, AU Posts: 152 Drives: 09 370Z 6MT RED Rep Power: 16	There is a new program for iphone and ipad: Welcome to Harry?s GPS LapTimer I just did a quick test last Sunday It works... but next time will be with proper Ipad 2 holder!!! __________________ Street = \| Venaci Spirit 20"x9.5"F +10 - 20"x11"R +5 \| Track = \| Nismo OEM 19"x9.5"F +40 - 19"x10.5"R +23 \| Bridgestone RE-11 265/35/19F - 305/30/19R \|

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04-29-2011, 11:57 AM	#2 (permalink)
sig11 A True Z Fanatic Join Date: Jun 2009 Location: Detroit Posts: 1,294 Drives: 09 370Z Red Sport-MT Rep Power: 18	I used Harry's Lap timer last weekend on my iphone. It performed fairly well I think considering it's price. The iphone is fairly limited by the max 1Hz sampling rate for the GPS though. I would like to talk a friend into loaning me his Traqmate one of these days... he has yet to use it since he had a wreck shortly after buying it.

04-29-2011, 12:33 PM	#3 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	i need to know what people are pulling under braking in terms of g"s. i am trying to see if i can get more details on it. unlike many, i still dont think temperature is a big factor in ice mode. maybe on stock pads, but it changed nothing on race pads

04-29-2011, 04:47 PM	#4 (permalink)
handyman Base Member Join Date: Jun 2010 Location: WV Posts: 45 Drives: 370Z Rep Power: 15	I'll be using the Trackmaster app on my Droid at an autox this weekend (same 1hz gps limitation as the iphone). If the data would be useful to you I'll post it up

04-29-2011, 05:01 PM	#5 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	cant hurt to try right, thanks.

05-17-2011, 10:35 AM	#7 (permalink)
handyman Base Member Join Date: Jun 2010 Location: WV Posts: 45 Drives: 370Z Rep Power: 15	Forgot to post that the droid app was basically useless for autox, the 1hz sample rate was nowhere near fast enough.

05-17-2011, 01:53 PM	#9 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 30	Temperatures might contribute to the problem, but I verified that it is not the only way to experience it. I left my XP10s on the car after my track day. I did one autox at a smooth lot, it was fine. I did one at a 40 years old lot with virtually no grip and wavey pavement. The car basically hit ice mode at every single corner. It didn't matter if the car was hot or cold, it just got into ice mode at every turn. To make matters worse, the car would jump in and out of ice mode even if you didn't hit it initially. It was a scary experience