Hi there,

Helping a buddy log his JHM RS6r car. The car is set up with rods, supertech valvetrain components and 1mm over exhaust valves. Downpipes, big exhaust, and running a MBC in standalone.

We are seeing an issue (logging with ME7l) that in 2nd gear he is getting the 28psi he wants and when that happens in the logs I can see the N75 DC is up in the 90s (even though it isn't playing a role in boost regulation) but in 3rd around 4500-5k rpm we start losing boost and it tapers down to limp mode. As this is happening, his N75 DC goes and locks @ 10%. He then gets a soft code for boost deviation (neg).

Any thoughts on what causes OK 2nd gear performance and then 3rd this is happening as stated above? Before sending a log to JHM we were hoping to get a clean run in of third gear from 2k to 6600 rpm.

(btw, I can post the logs later just at work now)

Thank you,

"MBC tuned" is an oxymoron.

Until you get logs with no MBC, they're worthless