Quote:
Originally Posted by X53Jay4.8is
The Dinan Hi Flow throttle body will require a software upgrade on the X5 to get it to run correctly. The Dinan air intake will work with no modifications to factory specs on the X5.
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This is how Dinan gets the 4.6 from 340/371 to 369/382:
S-Stage 3 tune, free flow exhaust, throttle body and transmission software 349/374.
S1-Stage 3 tune, free flow exhaust, throttle body, cold air system, MAF, and transmission software 363/378.
S2-Stage 4 tune, free flow exhaust, throttle body, cold air system, MAF and transmission software 369/382.
Dinan didn't make any claims of performance gains for any mods unless combined with a tune. However, we know that more, colder air in almost always helps as long as the engine adjusts for proper air/fuel mixture so there is likely some benefit from the COI alone but without the other S level components my quesstimate is 6-7/1-2.
I haven't checked recently but transmission software has been available. For $300 it is a great performance investment. I have no idea how anyone today can get all the Dinan stuff to get to 369/382.