Quote:
Originally Posted by chenry
I typically run a couple gallons of E85 with my 91 California crap gas but that's because I'm running a MP stage 2.5 tune in my 340 (sometimes I just run the 91 and the tune adapts) - that said. With all the wonderful flash tunes currently available I'm at a loss why anyone would go with a piggyback (unless they are running it in conjunction with a backend flash)
For my 2021 M340 (obviously several several months off) I am simply going to transfer my tune to the new car
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I haven't looked into actual ECU flashes yet much. Just saw the JB4 and thought it seemed nice because it has an app to adjust it and it's pretty easy to install. I feel like with the piggy back there's also still a slim chance if anything did go horribly wrong you might be able to remove it and get warranty to cover it. At least on my C63 with a new engine costing 71k, I like to have that chance.
Update: I just researched this a little and realized they can still easily detect a piggy back.