I have a 2001 740i SWB, and I've heard that there are not many performance upgrades you can do. From my understanding, you can install a trimmed AFE CAI for an E39 540i, get a DUMND tune, install a bigger throttle body (either an N62 throttle body or a dinan throttle body), and install an M60 intake. Could someone direct me to where I can purchase these parts?
moved to E38 forum
Shogun tricks and tips for the E32 series are HERE!
Junkyard and DUDMD, the CAI is unnecessary for now. Coming from a turbo back ground I would say don’t make upgrades that have minimal irrelevant gains. Stock system breathes fine, add meth to the system to cool intake temps and see what happens. We can’t even max injectors so I doubt a CAI will ad anything even if its put behind the bumper.
Try using the search function within this forum using the keywords from your subject:
https://www.bimmerforums.com/forum/s...ation-Addendum
https://www.bimmerforums.com/forum/s...for-DUDMD-Tune
https://www.bimmerforums.com/forum/s...all-and-Review
https://www.bimmerforums.com/forum/s...mance-Upgrades
https://www.bimmerforums.com/forum/s...s-VF-vs-others
https://www.bimmerforums.com/forum/s...rmance-upgrade
and there are several others. I've bookmarked 2 pages of performance improvement threads
"A good scientist is a person with original ideas. A good engineer is a person who makes a design that works with as few original ideas as possible. There are no prima donnas in engineering." - Freeman Dyson
4.6L is another choice
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