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      11-26-2012, 12:54 PM   #23
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idnan's Avatar

Drives: Alpine White 335i
Join Date: Nov 2010
Location: Birmingham

iTrader: (9)

Originally Posted by hellomyBMW View Post
Thank you for your quick reply.

I'm leaning towards JB4 since it's cheaper and you get nearly the same results compared to COBB.
When you say you are switching to a JB4 and COBB combination, does that mean you can have COBB on top of JB4 tuning? How is that possible with ECU flashes...? I'm confused...

Oh! and I forgot to ask... What exactly is protune for COBB?? Is that just another tuning map?
I'm bored at work

I've got bigger turbos so it is better to use the Cobb installed on the car as well as the JB4 so that there is finer control over the fueling. The ECU is flashed/programmed with the Cobb and the Jb4 is physically plugged in.

A protune is a custom map done by a company tailored to your specific mods or requirements. Some tuners do theirs on a dyno to acheive the best results whereas others email you the map and work off customer feedback.