cdbtx

Good data Swaybar - I run the AIM data acquistion system but am very impressed with your display. Sweet system and great displays. It's easy to read the data and make assumptions - but unless you have the driver input - it's basically nothing but numbers.

Are you racing your car?


Chuck


83 Kiln Red 928S

cooleyjb

I'd bet good money that's what it is. Just a slight tilt can explain the differences. If you think about it if the unit is turned 90 degrees on it's side it should read 1.0g.

If you look at your corner speeds for the corners like 8 and 12 you actually have fairly similar speeds but the lateral load is a fairly different. They are fairly similar speed corners at least in a formula car.

Was your Corvette setup similarly or was the car a softer sprung car, ie. stock? That will have a lot to do with it.
That is very cool, I look forward to see how the carousel changes as you get to the last third of the corner.
It's something that Gtech never mentions but the banking of a turn is very important. If you think about it a tire only has a certain amount of grip it can sustain laterally. In roundy round they use the same tires at every event but the banking has a large amount of factor in the speed.
My current racecar is in my avatar 89 van diemen. But I do hang out at Road America quite frequently too.

I've always had some problems with the numbers that the Gmeters put out. I find them to be good at comparing your laps to previous laps you have run but there are way too many variables to make the absolute numbers mean much. Like I've said, the lean of a car, the tilt of a course, etc. can have noticeable affects on the numbers.

jorj7

Rich,

Here's my plan for the return leg:

162 mph avg for the first 28.5 miles
139 mph avg in the Gap (10 miles)
179 mph avg to the finish (8 miles)

This should give us our 160 mph avg. Just don't tell anyone about the plan....

Nicole

Hi Tim:

You can easily measure the forces yourself with the new Butt-Dyno. No more wondering, if or how much you "can"... Best of all: It's just $399.95:

http://kalecoauto.com/index.php?main...products_id=41

If it turns out you are low on power, you can make some simple adjustments with this:

http://kalecoauto.com/index.php?main...products_id=30

But if you are lacking in g-forces, they also have a simple lowering kit that will lower your center of gravity. Just don't try this on your boat...

http://kalecoauto.com/index.php?main...products_id=11

Richard S

179 mph avg to the finish (8 miles) ...Works for me, I won't tell anyone

Rich

928drvr86.5

Correct! when held statically at 180 degress from it's 0G calibrated plane an accel will read 2G, at 90 degrees yields 1G , and 0 degrees is obviously 0g ETC.. So for every degree of body roll the accel will error an amount of .011 as mentioned. However, If a vertical accelerometer were used in this package( which i doubt), it would be capable of correcting for body roll. Still a fairly accurate measurement though. GPS would not be accurate in this respect unless 11 or so satellites were linked for triangulation. As i read from the website, the GPS is used for positioning and speed only.

123quattro

As an aside, GPS can be used to tell you some very interesting stuff. Vboxes with the dual anttenae option can calculate Ax, Ay, and body slip angle very accurately. I don't think the system in question is that sophisticated though. Still looks to be very useful.

928drvr86.5

GPS is being used by Excavating companies nowadays to very accurately calculate the cubic yards of material to be moved at a jobsite before bidding on the contract. You will see alot of construction equipement with Trimble or Topcon GPS systems on them for this purpose and also for very fine grading applications.

Vilhuer

No need to use butt dyno anymore. These will not record G's AFAIK but are othervise fun toys.

http://www.racechrono.com/?lang=en
http://www.tempes.com/index.html

Tahoe Shark

179 on a 180 tech, yah right. You obviously have not seen the radar gun near the finish have you. You probably have a super secret method of averaging 179 without going over 180, huh? If Rich can do that he's riding with me.

Nicole,
Are you now handling the Kaleco Auto products? Might be a good addition to your already excellent product line. If they make a lateral accelerometer to interface with the butt dyno I would be very interested getting one for Rich. He would have to download the data of course cause I'm not touching it after he goes through the canyon with George.

Nicole

I'm currently evaluationg the market opportunities...

Hilton

Just discovered this linked from another car forum I read..

The Nintendo Wii - their latest game console, has a controller with a 3-axis g-meter in it, accurate to 2 decimal places. Someone's written a script to get this data into their PC and plotting it in Excel.

If anyone has access to a Nintendo Wii and a PC, looks like its not too hard to measure your lateral G's:

http://forums.vwvortex.com/zerothread?id=3362586

Check out the spreadsheet linked from the post.. the lateral G's are in column D on the output sheet.

Edit/disclaimer: There is some doubt about the overall accuracy or margin for error on wii console so this is mainly for interest value