Tested stock 50i with vbox

[Kewl X5]

Originally Posted by onfireX5

Without specific testing I don't know. When I get a chance I am going to pressure drop test them to see if the larger M is still a restriction. If they are I am sending a set to K&N to install their media into the oem cage. My guess is that is not needed.

For a $60 drop in oem filter with 14% more airflow and designed by BMW for the M, it's a no brainier for me.

Good deal. Keep us 50i owners up to date!! Thanks for doing the Vbox! Stock 50i is a beast. Wonder how much faster tuning will improve the 50i acceleration...

[thags]

Originally Posted by Kewl X5

Good deal. Keep us 50i owners up to date!! Thanks for doing the Vbox! Stock 50i is a beast. Wonder how much faster tuning will improve the 50i acceleration...

A lot.
I'm BMS stage 1 with custom exhaust cut outs, and my car did 4 second flat to 60 using the dynolicious app which we were discussing is usually .25 slower... to Firex5 is thinking its a high 3's car..rocket ship for the size

[onfireX5]

Dl is definitely slower.

Did you ever test cutouts open vs closed ?

Your ride is a rocket.

[thags]

Originally Posted by onfireX5

Dl is definitely slower.

Did you ever test cutouts open vs closed ?

Your ride is a rocket.

Not yet... Actually just ordered the X5M filters, will post up videos of exhaust soon.. i have a build thread, but havent posted since july

The cut out makes a weirdly huge difference.. theyre right after the downpipes where the resonators were and the throttle response difference is huge.

If you mash the gas on the 50i it feels like the engine has even more power and its not unleashing it due to air restrictions or something.. Once I installed my cutouts, and put them on wide open it feels like the car struggles so much less to breath.

Only issue im having now is i honestly dont think the transmission can handle anymore power on this car,already having some weird 3rd gear issues when in the city

Interesting too, just on the X5M forum and there vbox numbers arent so far off some yours.... 4.0 0-60.. and 9.7 0-100

The 50i shouldnt be this fast!!!!!

[onfireX5]

The 50 is very hp underrated by BMW.

[X5Jouster]

i need to remove the BMS tune and drive around for a while. then do baseline dyno with catback GThaus exhaust with flaps open then flaps closed.

then BMS tune a week or two later.

my 0-60 using video recorded, time stamp. has only been as fast as 4.3....might have had faster launches but i dont believe i have accurate data.