Later, I will test various factors that affect the zero hundred. So far, I have tested the zero hundred acceleration more than one hundred times, and tested the tire pressure, engine oil, gasoline 98/95, exhaust valve switches, driving mode, car weight, air conditioning… etc.

There are only two factors missing the test now. One is the temperature (I need to wait for Guangzhou to cool down), and the other is the exhaust (I have changed the exhaust, so I need the assistance of a car owner who has not changed the original exhaust).

Changing exhaust affects low torque and power. I really want to find out the specific percentage of low torque lost, at which speed the loss is more, and how much power is increased at high torque.

If you have been struggling with whether to change the exhaust gas and want to know how much the impact of changing the exhaust gas will be, you are welcome to do some tests with me.

There are two main tests:
1. Turn on the horsepower machine and pull down the data (I pay for it);
2. Test 100-kilometer acceleration.

I need a national 6b BMW 540i that has not been modified, GPF removed, and any programs swiped. Interested car owners can contact me.

Friends from other regions are going to Guangzhou in the near future, so they can spend half a day.

(After hundreds of tests and changing conditions, the current zero-hundred acceleration has been optimized from 6.23 seconds to 5.51 seconds, which is still far from 5.1 seconds.)

The tires were changed a few days ago, and the Bridgestone T005 was replaced with a Michelin PS4 ZP, both to prevent tire bursts.

The temperature in Guangzhou dropped from 30 degrees to 22 degrees.

I retested it several times today, including two ejection times, 5.13 seconds and 4.96 seconds respectively.

(I forgot to turn off the air conditioner during the second ejection, otherwise it could be reduced by about 0.04 seconds).

By the time it drops below 10 degrees in Guangzhou, this 540i zero-hundred should have no problem getting it in about 4.8 seconds.

For every 1 degree drop in the temperature, the temperature can drop between 0.015 and 0.02 seconds.

What’s more important is that the new Michelin tires eject without slipping at all, and the old Bridgestone tires have been slipping at 50 kilometers per hour.