ESS Tune on a Leased Z4 35i?

[nicknaz]

Originally Posted by blschaefer1

He indicated that their AccessPort first copies the OEM flash from the ECU to the device, then overwrites the ECU with the selected Cobb flash. Once this is done, all history data from the ECU (sensors, etc.) is reset.

There is still the possibility that the "overspec" as mentioned by Vintage lives in a part of the PCM that the Cobb can't write to. Will be interesting if he is able to get Cobb to weigh in.

I would say Stage 1 Sport (i.e. the regular 91 octane map) is doable if you mix 100 octane in a 3:1 ratio with CA 91. Would be interested in hearing about your logs.

@VailM3, I was under the impression that the 35is Stage 1 aggressive is +8% power and 35i stage 1 aggressive is +30% so that puts 35is stage 1 and 35i stage 1 to be equivalent? I'm really not trying to turn this into a i/is thread, just wanting to understand the differences

[blschaefer1]

Originally Posted by VailM3

So you are at ST Stage 2 Aggressive or Sport?


I am running LT Stage 1 Aggressive on mz 35is (essentially as stage 2 for 35i) I agree its LT make the power come on tap feel like a NA engine. Not a bad thing just not used to it.

No, I am currently running ST Stage 1 Drive, their least aggressive map.