When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
How accurate is the HUD G meter on these cars ? If a GS can generate 1.0 G or so on a skidpad why have I seen over 1.0 G without the rear stepping out ? Is the HUD overly optimistic ?
On the track I've seen 1.03 sustained in a long left hand turn, cloverleaf should be the same. There was more grip left at this level, I expect I could get 1.05 to 1.07 on new tires, maybe more. The tires I have are the original GoodYear SC's. For me its not so much the hard accuracy as it is repeatable accuracy, I think the meters do pretty well. Keep in mind too, the turns I'm running on aren't banked as much as a freeway cloverleaf, so YMMV. Just be very careful approaching maximum g's and really, the track is a much better venue for researching maximum grip than public roads, a lot more fun too!
What are you trying to validate? Are you saying your car consistently shows 1.25 G, or what? Can't really answer a vague question......post your numbers......maybe they're okay under the circumstances......maybe not.
What are you trying to validate? Are you saying your car consistently shows 1.25 G, or what? Can't really answer a vague question......post your numbers......maybe they're okay under the circumstances......maybe not.
Not really trying to say anything. I was just surprised at the numbers that I have seen on an off ramp at relatively low speeds with no drama from the rear end. I was just thinking that the HUD was reading high so that driver could feel good about him/herself.
There really isn't a good place on the road to push it that hard. A couple friends and I hit .98g but there was runoff room and it was low speed. My GS on Super Sports still had grip left.
Our 2009 Z51 on PS2 runflats has hit momentary readings of over 1.2G, but as mentioned the car could never sustain that. I do the testing in a big parking lot, NOT on the street.
Keep in mind that body roll and road banking will confuse the issue. The meter can't tell the difference between G from cornering, from body roll, or from a banked corner.
Our 2009 Z51 on PS2 runflats has hit momentary readings of over 1.2G, but as mentioned the car could never sustain that. I do the testing in a big parking lot, NOT on the street.
Keep in mind that body roll and road banking will confuse the issue. The meter can't tell the difference between G from cornering, from body roll, or from a banked corner.
I did not think of the banking aspect. Since there is almost zero body roll in the corners, the banking of the ramps must be causing the meter to read high. I guess I will have to find a wide open space to try it on level ground.
If a corner is banked in the "proper" direction, that would reduce the reading on the meter for any given actual G. But the banking will also allow you to pull more G at the limit, and I don't know which would have more effect.
the G shown on the HUD will be the actual pull being experienced by the car - the banking of the turn just allows you to negotiate the turn faster but it will not allow you to experience a higher G
Originally Posted by Gearhead Jim
If a corner is banked in the "proper" direction, that would reduce the reading on the meter for any given actual G. But the banking will also allow you to pull more G at the limit, and I don't know which would have more effect.
Originally Posted by Patsgarage
I did not think of the banking aspect. Since there is almost zero body roll in the corners, the banking of the ramps must be causing the meter to read high. I guess I will have to find a wide open space to try it on level ground.
the G shown on the HUD will be the actual pull being experienced by the car - the banking of the turn just allows you to negotiate the turn faster but it will not allow you to experience a higher G
I think you're right. You will also be experiencing a downward G force, like what you get in an airplane turn, but the meter can not read that.
Hold the page button down (10 secs) and the highest previously achieved G number will be displayed once in the HUD, turning off the motor erases this.
Someone said the 2005 does not do this, but the later ones do.
You don't need to be in Track mode on the HUD when doing the driving, you can switch to Track after you stop and pull up the G at that point. But as you mentioned, shutting off the engine will erase the data. I can seldom remember to look at it before shutdown.
I don't have a Vette. I have a '14 CTS V Wagon. Manual. It's on RE-11 tires (200 treadwear), but I can drive too. This is what I got at Thunderhill three days ago. Just now saw it and started searching on Google. Looks like they are pretty good numbers! I def wasn't watching it or doing anything to get a good number. Just driving the **** out of it.
I have not really tried to look at my G-meter while actually driving as I'm too focused on the road. But on pretty worn R888a at a track day the max that my meter showed was 1.47. Certainly I was over 1.5 G's when the tires were fresh.
On the street I have checked it and seen it in the .8 - .9 G range but I wouldn't go any faster than that on the streets around here.
Yeah, keep your eyes on the road and not the G meter! It's hard to remember to check the meter before you shut down but every once in a while I do. I've seen 1.11 G's in street driving. Skid pad numbers will be lower because skid pads are perfectly flat and you have to hold the cornering all the way around the circle. It's amazing how much more G's you can pull with just a little banking.
The G-meter is simply displaying data that is on the GMLAN in the car. This data is used by other systems in the car, most notably the Active Handling system. As such it must be accurate in order to be of use in keeping the car out of bad situations. The display is not going to be purposely displaying incorrect numbers...the data is too important in other areas.
HUD G meter
