[e46samuel]

I’ve been trying to swap this intake manifold for my 325i. I have the whole throttle body disa and everything except the part that plugs into the 330 intake and the fuel injectors (dont know the name of it). I’ve been looking at threads and found alot of useful info, but ive gotten to a place where I need experts help and recommendations. if there are any people who’ve done it successfully can i get some tips and info.

 

[MrMCar]

The addition of the larger intake manifold and throttle will increase airflow.
HOWEVER it is VERY likely that your DME (engine computer) in this stringent era of OBD monitoring will have the check engine light come on at some point. Owing to too much airflow and a MAF that has readings outside the tolerance.

Basically the DME will see too much airflow weighed against the needed air intake. The adaptations will make corrections, up to a point until it hits the delta of about +/- 10-12%. Once adaptations go beyond that threshold the light will come on and there will be "fuel trim" faults stored and possible O2 sensor codes.

Your way around this is a tune that takes the new parameters (larger intake) and the tune is written for it.

I'm guessing you're in a quest for more HP?
The FASTEST/easiest way is to source a known good engine form a 3 liter 330 or 530.

 

[e46samuel]

The addition of the larger intake manifold and throttle will increase airflow.
HOWEVER it is VERY likely that your DME (engine computer) in this stringent era of OBD monitoring will have the check engine light come on at some point. Owing to too much airflow and a MAF that has readings outside the tolerance.

Basically the DME will see too much airflow weighed against the needed air intake. The adaptations will make corrections, up to a point until it hits the delta of about +/- 10-12%. Once adaptations go beyond that threshold the light will come on and there will be "fuel trim" faults stored and possible O2 sensor codes.

Your way around this is a tune that takes the new parameters (larger intake) and the tune is written for it.

I'm guessing you're in a quest for more HP?
The FASTEST/easiest way is to source a known good engine form a 3 liter 330 or 530.

i’ve read that the check engine lights can be prevented with a proper tune and couple other troubleshooting tricks, if i do get a check engine idc i’ll wipe it.

im not doing a 3.0 swap
couple personal reasons:

i wanna see how much i can pull out of the 2.5

im electric swapping sometime next year and dont wanna fumble around with too many motors

cause thats the easy way out

 

[e46samuel]

i need help with this part (attatched)
so on the 330 this part has a connect that connects into the intake but on the 325 it doesnt, is there a fabrication that i could do or do i need to get the connector from the 330?

 

[MrMCar]

That's a intake air temperature sensor.
IIRC (?) it's installed in a different location across the various intake manifold designs. Take a look at the other one. Is it there, but in a different location?

 

[e46samuel]

That's a intake air temperature sensor.
IIRC (?) it's installed in a different location across the various intake manifold designs. Take a look at the other one. Is it there, but in a different location?

yep on the 325 it’s on the boot if i believe.
I have access to the original 330 wiring harness, I was wondering if i could use that on my 325?