BMWE60_1989

hi guys,

i'm new hear but i was reading this thread and i'm running an n52b30 motor right now...i've been considering horsepower gains since i picked up my car...originally i want to swap a healthy n54 twin turbo in there as i have a manual tranny and i think that combination would kick ass lol...but it seems like the n54 has a lot of issues especially with carbon build up

i was talking to my mechanic and he recommended some cheaper and easier ways to actually increase the bhp without having to swap my motor out...basically he said that that n52 (b25 or b30) when it's put into the 5 series it's tuned from the factory to produce less power for whatever reason...but he said a simple trick a lot of ppl do to get hp gains is to change the intake manifold...apparently the same gen 330i comes with a multi-stage disa valve system that allows for higher air flow and thus higher hp...apparently with the 3-stage disa valve and a factory tune for the 330i you can get your stock n52 running 215hp up to 275+ hp...in his experience he said the car typically gains 60 to 70 hours power from the upgraded manifold and tune...here in N/A the manifold is anywhere from $800 to $1100 not sure how much the tune would run you...but it still seems cheaper than an entire engine swap

also if you wanna brake the 300hp mark and get into the 535 territory you can shell out the $450+ for the aFe carbon fiber air intake system for gains of 12-14hp as the manufacturer suggests...and pink top injectors for some more additional hp gains and you should be able to proudly put your 525 up against a stock 535 lol

Vanevera

Hi guys,

I am coming back to this post. So, I have made a swap Some details are here: I have swapped N52B25 (218 hp) engine with N52B30 (234 HP) engine. The new engine comes from 2013 E 92, 328 xi and has 40000 miles. It was direct swap, no need changing anything. The job took one whole day. Mechancis have first removed the new engine from the donor car, then they have removed engine from my car and put the new engine into it. The car has started without any issues.

So, this was the process. But here is one issue that I would like to discuss with you. The problem is that, it seems that there is no much increase in power with new engine. My observation is that there is slight increase, but I was expecting better performance. It almost drives like 2.5 not 3.0.

I did not do DME flash. So, basically car DME is programmed on 2.5 engine. Can it be the cause that new 3.0 engine performs like 2.5? Will a 3.0 tune resolve the issue. Or will I need to change intake as well? I would like to reach the factory maximum of N52B30 engine, that is 272 HP.

And, As far as my car has the MSV80 unit, as the donor car, 3.0 tune will be enough, without the need to change the whole DME and CAS.

Any ideas are welcome !

Thanks in advance