Acceleration times with my GTimer
12/19/04, 04:52 PM
#1
Mach 1 Member
Thread Starter
Join Date: July 11, 2004
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
I got my Escort GTimer GT2 today, and had only a little time to play with it.
I ran down to my secret test strip, which is a fairly level road with just over a 1/4 mile of run space. I pre-ran it to make sure there was nobody around to make it unsafe for body or license, and did a quick two-way run.
On both runs I shut down right around the 1/4, and it affected my 1/4 mile speeds. I'm not sure that this area has enough room for me to run the 1/4 safely, so I may not do it again there.
My first run was 13.72@88.3 the second was 13.8@93.3. Like I said, I shut down early and my speeds reflect that. Needless to say, it looks like this is a mid-to-low 13 second car. My zero-60 times on those same runs were 5.07 and 5.2 respectively. 60ft times were in 2.1 sec for each run, I launched really softly at under 2000rpm, not aggressively at all.
My max speed on each run was 98.8.8 and 99.7. If I had kept on it through the quarter in each run instead of backing off, my guess is that the runs would have been maybe averages 13.6@99mph.
The 2nd run is slightly uphill vs. the first slightly downhill. It's pretty darn close to level, though.
Now I need to order the optional software and cable so I can download and analyze these runs in more detail!
BTW, I am running an SCT 91 octane tune and HC removal right now.
I ran down to my secret test strip, which is a fairly level road with just over a 1/4 mile of run space. I pre-ran it to make sure there was nobody around to make it unsafe for body or license, and did a quick two-way run.
On both runs I shut down right around the 1/4, and it affected my 1/4 mile speeds. I'm not sure that this area has enough room for me to run the 1/4 safely, so I may not do it again there.
My first run was 13.72@88.3 the second was 13.8@93.3. Like I said, I shut down early and my speeds reflect that. Needless to say, it looks like this is a mid-to-low 13 second car. My zero-60 times on those same runs were 5.07 and 5.2 respectively. 60ft times were in 2.1 sec for each run, I launched really softly at under 2000rpm, not aggressively at all.
My max speed on each run was 98.8.8 and 99.7. If I had kept on it through the quarter in each run instead of backing off, my guess is that the runs would have been maybe averages 13.6@99mph.
The 2nd run is slightly uphill vs. the first slightly downhill. It's pretty darn close to level, though.
Now I need to order the optional software and cable so I can download and analyze these runs in more detail!
BTW, I am running an SCT 91 octane tune and HC removal right now.
12/19/04, 11:46 PM
#4
Mach 1 Member
Thread Starter
Join Date: July 11, 2004
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
5spd manual.
At 2400, I light my tires unless I slip the clutch pretty liberally. I'm going to use the GTimer to play with my launches, more so after I get the cable/software so I can really see the details of the launch.
At 2400, I light my tires unless I slip the clutch pretty liberally. I'm going to use the GTimer to play with my launches, more so after I get the cable/software so I can really see the details of the launch.
12/20/04, 08:07 AM
#8
Mach 1 Member
Thread Starter
Join Date: July 11, 2004
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
The GTimer can be bought directly from Escort (the guys who make radar detectors).
http://www.gtimer.com/
My 1000 ft times were 11.43 and 11.55 respectively.
The unit can also be calibrated with various data like the weight of your car in order to do estimates of peak HP. It cannot do torque because, unlike the similar product from GTech, the GTimer doesn't read your power supply for spikes to guess the engine RPM.
There are stock values for how quickly it starts to measure when you start, such as what vlue in G before it is considered a start, and a way to adust for a staging distance. I haven't changed those from the factory.
In order to tune the unit to most closely match those from a drag strip, they tell you to adjust the rollout. They have two rollout figures, a Speed rollout and a 1/4mile rollout. One only affects speed results, one only affects distance results. You use those to tune to your 60ft and some of your speed results vs. a track. By default the rollout is set to 12".
Bottom line is that the numbers I quoted may NOT be what I would get at the track, but they are close, and this unit produces accurate and reproducible results. So it can be used to test differences in power or weight modifications.
I'll probably try and get some more numbers at lunch time (grin).
http://www.gtimer.com/
My 1000 ft times were 11.43 and 11.55 respectively.
The unit can also be calibrated with various data like the weight of your car in order to do estimates of peak HP. It cannot do torque because, unlike the similar product from GTech, the GTimer doesn't read your power supply for spikes to guess the engine RPM.
There are stock values for how quickly it starts to measure when you start, such as what vlue in G before it is considered a start, and a way to adust for a staging distance. I haven't changed those from the factory.
In order to tune the unit to most closely match those from a drag strip, they tell you to adjust the rollout. They have two rollout figures, a Speed rollout and a 1/4mile rollout. One only affects speed results, one only affects distance results. You use those to tune to your 60ft and some of your speed results vs. a track. By default the rollout is set to 12".
Bottom line is that the numbers I quoted may NOT be what I would get at the track, but they are close, and this unit produces accurate and reproducible results. So it can be used to test differences in power or weight modifications.
I'll probably try and get some more numbers at lunch time (grin).
12/20/04, 08:33 AM
#10
FR500 Member
Join Date: September 18, 2004
Posts: 3,108
Likes: 0
Received 0 Likes
on
0 Posts
Hope to be able to raise launch rpm considerably when I come up with a better set of rear tires/wheels, next project. The G-Timer looks like fun. Where do you plan on mounting it? I see how it mounts now, I'll spend some time reading up on this!
12/20/04, 09:35 AM
#11
Mach 1 Member
Thread Starter
Join Date: July 11, 2004
Posts: 658
Likes: 0
Received 0 Likes
on
0 Posts
It must be mounted perpendicular to the road, i.e. don't tilt it towards the driver. It uses only 2 accelerometers vs. the GTech's 3, so this is the one caveat needed. The GTEch units use 3, so they are able to calibrate and adjust for alignment of the unit. But the price on this one is right (grin) and from what I've read, some magazines did reviews and found this one to more accurately reflect trap speeds.
Then again, maybe it was more accurate with THEIR car and THEIR driving style, and it wouldn't be for mine.
Mine was a 40th birthday present from my dad, replacing his offer of a car cover. As such, I'm not going to complain about GTech vs GTimer, and I'll just enjoy this product for what it does (grin).
Then again, maybe it was more accurate with THEIR car and THEIR driving style, and it wouldn't be for mine.
Mine was a 40th birthday present from my dad, replacing his offer of a car cover. As such, I'm not going to complain about GTech vs GTimer, and I'll just enjoy this product for what it does (grin).
12/20/04, 01:01 PM
#13
GT Member
Join Date: December 6, 2004
Posts: 155
Likes: 0
Received 0 Likes
on
0 Posts
I have a GTech and I would concur on the trap speed comment. I have found the times within +/- .1 but the mph is usually 2-4mph on the high side. Still, these toys are good to use as a comparison model.
12/22/04, 09:56 AM
#14
The Analog Admin!
Join Date: November 27, 2004
Location: Visalia Ca.
Posts: 11,003
Received 3,216 Likes
on
2,361 Posts
I have wanted a G-tech for the Last Five Years fo Christmas and My wife always had an excuse for not Getting it! So this Year I ordered it Myself! I got it Last night and I am Impressed to say the Least! I got The Gtecch r/r Version because You Can Download the Info to Your Computer! I compared Horsepower to Some of the Dyno Runs listed in the Forums and it is Very Close! The Quarter Mile Times are within a Couple of tenth's to The Car and Driver Spec's I will try and Post the Sheet if the File is not to big! My car is an Auto c/d's Car was a Stick! 0-60 5.1 Seconds 1/4 mile 13.70 @ 100.76 mph I am Happy with that! BONE STOCK 3750lbs total weight!
12/22/04, 10:27 AM
#17
The Analog Admin!
Join Date: November 27, 2004
Location: Visalia Ca.
Posts: 11,003
Received 3,216 Likes
on
2,361 Posts
Pic 2!!!!!!!!!!!!! This Thing is Way Cool! I will test my 02 Harley Truck Tonight!
kc
kc
12/22/04, 10:30 AM
#18
The Analog Admin!
Join Date: November 27, 2004
Location: Visalia Ca.
Posts: 11,003
Received 3,216 Likes
on
2,361 Posts
Hey 2005 red Gt You got to have one! I would love to see the Horspower figures Compared to your Dyno Horspower figures!!!!!!!
