What is a good lateral G reading for stock M3P ?

[Ben D]

I broke the racing cherry of my Model 3 P yesterday at a hillclimb event, and when using track mode the car registered a peak lateral G reading of 1.6 G. This seems pretty high for a stock vehicle using stock Michelin Pilot 4 S tyres. Is the G meter of the Model 3 in track mode accurate ? If so, I assume road camber must play a role in this ?

For the record, the car was quick. I got in the top 6 cars on the day on a road I'd never been on before after only 4 attempts, within 1 sec (2%) of the times lodged by modified 4WD track cars including R35 GTR and Mitsubisho EVO 6 rally cars with slicks... My guess is the Model 3 P flatters its drivers somewhat...

 

[GLM3]

I've autocrossed many different cars with a BMW M3 generating the highest Gs with good autocross tires and never got over about 1.2 Gs if I remember correctly. I would be surprised if the Michelin Pilot street tires could handle much more than 1 G before letting go.

 

[mattack4000]

That’s just a spike in g, not sustain, not really useful figure. I did 2.2 on the thing today, doesn’t mean all that much.

 

[dfwatt]

That’s just a spike in g, not sustain, not really useful figure. I did 2.2 on the thing today, doesn’t mean all that much.

Yes its peak G's vs. sustained Gs. If you can hold a sustained rate of 1.2 1.4 G's that's amazing. That's what track guys are reporting with slicks and a tricked-out suspension

 

[Ben D]

Thanks. I thought it seemed high.

 

[dfwatt]

Thanks. I thought it seemed high.

It's easy to test this. If you turn the wheel really hard over for example before you break traction you will see Peak G loadings way above what the vehicle can sustain. Those Peak G loadings are what you can sometimes get in response to a steering transient but where you then back off on the lateral acceleration so the car does not break traction. Also being on really fresh asphalt helps a lot. That's probably worth at least 0.2 G's compared to more slippery surfaces like concrete.

 

[lbowroom]

Unless you have a very big wing....

 

[raptor5244]

If you pass out mid corner.