BMW M3 G80 G82 - View Single Post - Just installed Racechip on G80 M3 Comp XD

MrJDS · 11-16-2021, 11:08 PM

I too am deciding between RC and JB4 for my xdrive g80 (prefer bootmod but I'm hearing the flash is a ways away). Going to be running just 91.

It seems from my research that RC is the more sensible option (power increase comes in a more linear fashion) whereas JB4 is a bit more aggressive. I might not notice the difference if I'm just running 91 but can anyone confirm this? Anyone have experience with both in the g8x platform?

Im thinking for an xdrive it might make sense to go with the more aggressive option since it can handle the increased power better than the RWD versions.

11-16-2021, 11:08 PM	#50
MrJDS New Member 16 Rep 26 Posts Drives: F80 CS, G80 xdrive, G87 (now) Join Date: Jul 2021 Location: Nevada iTrader: (0)	I too am deciding between RC and JB4 for my xdrive g80 (prefer bootmod but I'm hearing the flash is a ways away). Going to be running just 91. It seems from my research that RC is the more sensible option (power increase comes in a more linear fashion) whereas JB4 is a bit more aggressive. I might not notice the difference if I'm just running 91 but can anyone confirm this? Anyone have experience with both in the g8x platform? Im thinking for an xdrive it might make sense to go with the more aggressive option since it can handle the increased power better than the RWD versions. Last edited by MrJDS; 11-16-2021 at 11:22 PM.. Reason: added clarification that just running 91 oct
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