Boost, timing and AFRs on stock M5?

[ajm55]

Trying to establish from the attached data log whether my comp pack M5 is stock. This is a data log of a 2nd and 3rd gear pull.

To convert the boost reading in the log from "kpa" to "bar", you need to deduct 83 and to convert AFRs on banks 1 and 2, you need to multiply by 14.7.

Using these formulas, the car is seeing maximum boost of about 1.37 bar and maximum timing of 16.5 degrees, while AFR dips to about 12.8 at the top of the rev range

[ajm55]

Anyone know what maximum boost and maximum timing one should expect to see on a stock competition pack M5?

[technician117]

Not sure on Comp pack but I think a standard M5 S63TU has max boost around 21.7 psi.

[ajm55]

Originally Posted by technician117

Not sure on Comp pack but I think a standard M5 S63TU has max boost around 21.7 psi.

Thanks. I'm not seeing that much. I'm seeing about 20psi and 16.5 degrees of timing. It's been suggested to me that those are high numbers for a stock comp pack but I'm guessing that they aren't. I am at 5,500 feet above sea level and while I'm somewhat ignorant of the workings of a turbocharged motor, I understand that the car should compensate and boost the same at this altitude as it would at sea level