Accelerometer Thread

[Asharus]

Those look correct for Asian city driving.

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[BMR Tech]

Made some passes on my car the other day. (straight line launches)

1.50
1.48
1.50

Finally got that 1.5 lol

 

[stoli]

Made some passes on my car the other day. (straight line launches)

1.50
1.48
1.50

Finally got that 1.5 lol

Nice job! My trip to The FIRM bumped my laterals and braking. The 1.5 lateral is probably skewed from catching a slide. ;)

 

[Artem]

 

[Old 5 Oh]

Anything over 1.0 g lateral is a transient of some kind, a caught slide, or an uphill turn where you have extra traction. Some of these numbers are really freakishly high. Makes me think there needs to be a reset button or all four directions are soon going to reflect strange anomalies rather than real performance.

 

[stoli]

Anything over 1.0 g lateral is a transient of some kind, a caught slide, or an uphill turn where you have extra traction. Some of these numbers are really freakishly high. Makes me think there needs to be a reset button or all four directions are soon going to reflect strange anomalies rather than real performance.

I'll reset mine next month when I do a hpde and see what the numbers are at the end of the day. Obviously acceleration won't be there like the drag strip, but I suspect the braking will be right at 1.5 again and laterals will be at or darn close to 1g.

[MENTION=9985]BMR Tech[/MENTION] - what's your accel number after this weekend?

 

[daltron]

Anything over 1.0 g lateral is a transient of some kind, a caught slide, or an uphill turn where you have extra traction. Some of these numbers are really freakishly high. Makes me think there needs to be a reset button or all four directions are soon going to reflect strange anomalies rather than real performance.

Stock, maybe. Add suspension parts and better tires? Over 1.0g easy.

 

[Norm Peterson]

Hi guys. I have a 2015 mustang gt automatic. I have 1.07 lateral g. I had to powerslide it at about 90 mph in order to go above one g. I have a question for you guys: does powersliding or slightly drifting the car compromise chassis rigidity? Do any of you believe you will eventually get rattles or noises in the chassis or suspnsion because of powerslides? Thanks for any info or opinions. I live in south america and I want to keep my car for a loooong while but also enjoy it to.

You don't have to do anything like powersliding or drifting to pull big lateral g numbers, just drive the car through the corner. But understand that the ability to drive at 1g or higher is something that takes a kind of "sneaking up on it" practice. I doubt that anybody goes from never driving above 0.5g . . . straight to 1.15g and higher.

some people in that thread has a bs g accel meter.

stock pp is .83
tune cai .85

How accurate is the accelerometer? 1.06 seemed high to me...

Anything over 1.0 g lateral is a transient of some kind, a caught slide, or an uphill turn where you have extra traction. Some of these numbers are really freakishly high. Makes me think there needs to be a reset button or all four directions are soon going to reflect strange anomalies rather than real performance.

It is possible that body motions - roll, nose dive, squat on acceleration - are affecting the readings. But not by all that much and certainly not by enough for somebody's 1.2g reading to really be less than somebody else's 0.95g unless the latter car has been heavily modified and maybe the first car broke a front sta-bar endlink.

Here's a screenshot from a datalog taken with an Aim Solo. My '08 GT, 285/35-18 Michelin PSS on 11" rims, adjustable sta-bars, Koni yellows, and still on the (soft) OE springs. The maximum shown is only for what happened on that lap (I know I've seen more than 0.97g braking). 60° day, but the tires definitely were warm. Other laps had similar numbers.

1.28g left
1.36g right
0.97g braking
0.31g acceleration (3rd gear with a NA 4.6L, can't really expect much more)

Norm

 

[BMR Tech]

@BMR Tech - what's your accel number after this weekend?

It was 1.64 IIRC!!!

 

[brandonsmash]

Out of curiosity, does anyone notice the actual center dot move? Mine will move ever so slightly if I'm in a corner, but it's hard to notice.

 

[skeeter]

Accel on p zero at the track with horrible 60' no BMR.

 

[Horse]

My V6 has only 500 miles on it now. Never pushed it hard or anything b/c of break-in. Then the other day (with even less miles on the car) I came across the accelerometer and it was about 0.6 g all way around.

Not knowing what 0.6 g translates to, I am curious whether normal/conservative driving would produce this kind of acceleration. Or maybe someone test drove it very hard before I bought it? I am cool with it either way. Just curious.

 

[HoosierDaddy]

My V6 has only 500 miles on it now. Never pushed it hard or anything b/c of break-in. Then the other day (with even less miles on the car) I came across the accelerometer and it was about 0.6 g all way around.

Not knowing what 0.6 g translates to, I am curious whether normal/conservative driving would produce this kind of acceleration. Or maybe someone test drove it very hard before I bought it? I am cool with it either way. Just curious.

That's no where near driven hard. But its more than conservative. Studies show an average passenger (whatever that means) starts feeling anxious at just .25 Gs.

 

[Norm Peterson]

That's no where near driven hard. But its more than conservative. Studies show an average passenger (whatever that means) starts feeling anxious at just .25 Gs.

This ↑↑↑

20 years or so ago I did an informal series of observations, measured mechanically. Left to themselves, few drivers exceeded 0.3 lateral g. 0.5g walked away from virtually all of the ones who did go beyond that level. 0.7g basically ran away and hid from everybody. Didn't seem to matter whether there were passengers in the other vehicles or just the drivers.

That was as measured on various highway curves and entrance ramps. FWIW, most of the higher observations were in the slower, tighter turns.

In the meantime, the cornering and handling performance of the newer cars has gotten so much better that 0.6g really isn't all that much or all that hard to come by. Average traffic through this one particular entrance ramp runs about what the first pic shows (I was behind somebody), and you wouldn't have to be driving very hard at all to get the results shown in the second (when I had a clear shot).

Norm

 

[Horse]

That's no where near driven hard. But its more than conservative. Studies show an average passenger (whatever that means) starts feeling anxious at just .25 Gs.

This ↑↑↑

20 years or so ago I did an informal series of observations, measured mechanically. Left to themselves, few drivers exceeded 0.3 lateral g. 0.5g walked away from virtually all of the ones who did go beyond that level. 0.7g basically ran away and hid from everybody. Didn't seem to matter whether there were passengers in the other vehicles or just the drivers.

That was as measured on various highway curves and entrance ramps. FWIW, most of the higher observations were in the slower, tighter turns.

In the meantime, the cornering and handling performance of the newer cars has gotten so much better that 0.6g really isn't all that much or all that hard to come by. Average traffic through this one particular entrance ramp runs about what the first pic shows (I was behind somebody), and you wouldn't have to be driving very hard at all to get the results shown in the second (when I had a clear shot).

Norm

Thanks, as now I have a better understanding. Once break-in is down, I will see what kind of driving it takes for me to get higher numbers.

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