You will need to do your own remap. The off-the-shelf tunes I have seen have been garbage. They don't change the vanos timing.

I have cams, CAI, full exhaust and I am still finding the sweet spot with tuning.
From my tuning, I have found that the intake and throttle have no restriction. The vanos timing is closing off overlap early and shutting down the power.

I have mine running at 112% VE and it still pulls past 5500rpm.

 

What cams did you go with? Is there a good alternative to the schrick cams? They're so expensive and im not sure if worth it or not.. i see people on this forum estimate the gains anywhere between 5 - 20 hp.. whats your experience having fitted them

 

http://www.ca-int.co.uk/home.php if i do it i will be going to these guys here in the uk they seem to really know what they're doing and been around for years... ^ whats VE ?

 

VE= volumetric efficiency.

 

Euro 325 has 192 hp,
If you add an m54b25 intake and then adapt the ecu map on those mod ( a real custom tune) you'll have more power than a stock 325

My 328, with catless headers,both resonators, Cai and m54 b30 mani (Stock 328 map not eu2 and a weak 02 sensor) and an unconsiderable job on porting on ducts, gave me 233 hp with 100 gas.

Not official dynoed but benchmarked with torque and an other 328 with certified dyno ( by adjusting VE on app to match real hp)

Raw method, but worth to give an optimistic idea is OK.

Inviato dal mio SM-T705 utilizzando Tapatalk

 

I am running Schrick 248/248 cams. They need a tune to make full use. Without a basic tune the car will not idle properly.

I have had good days and bad due to not having tuned on the dyno yet(no tuners for factory DME where I am). When I have a good day, it is easy to keep up with a pre 05 WRX.
When the tune and temperature are good, it is a cracking ride. Sometimes it will spin the 265/35R18's fitted.
I am in the process of fitting B30 manifold and new DME for realtime tuning on the dyno(knock, launch and traction control included with methanol injection to come later).

I have felt a considerable benefit from testing methanol injection before the throttle body. It cools the whole intake and stops knock dead. On hot days is was awesome with little improvement on cold days.

 

my engine with schrick 264/248 had perfect idle before any tune.
lack of dyno is a headache when trying to find optimum configuration. i also have had good days and bad.

 

264/248 is not much bigger than stock on a 3.0L engine. You also have more factory spread angle at idle.

The 2.5L goes from around 5deg overlap at idle(stock) to around 25deg with 248/248 and no tune.
The STFT will hit the limits and go into limp mode within a few minutes of idling(2.5)

 

stock 3.0l overlap is 7.1 deg at idle. with schricks went to 22.1.
i reduced it to the minimum possible 18deg

 

Hmm from reading what you guys have said im not sure changing the cams is worth the potential problems.. good days and bad doesnt sound like a very positive endsorsment of a cam swap lol

 

It has more to do with the DME and tune. I was lucky to get a good day from 30 with the stock setup, now I get a good day once or twice a week.

If you put a supercharger on it(2.5L), you should get cams to make it breathe. The stock cams are crap.

rb01, I am getting 605kg/hr at 6000rpm with stock intake and throttle body. That alone proves the intake and throttle are not the restriction everyone thinks they are.

 

I started from stock 323i and now car pulls not bad at all.
M54B30 intake cam,b30 intake manifold, m52(single vanos) exhaust manifold and will change it to m50 just for testing,gas throtle from 4.8is engine, ms43 tuned ecu.
Engine now takes about 570kg/h of air, soon will spin it on dyno again