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Discussion Starter #1 (Edited)
Hey guys, I have a 2002 325ci. It's Oxford Green with tan interior. Along with a manual transmission. I have a few things done to it and many more on the list. I want to try and make this car as fast as I can without sacrificing the drivability and reliability. The car has 203,xxx miles and I've had it since it had 170,xxx miles. The motor has never given me even the slightest hiccup other than the expected oil leaks and regular maintenance of a high mileage car (belts, pulleys, etc). It needs a bit of love here and there. I'll post pictures as I go. I put the car on the dyno about a two years ago when it was stock, other than straight pipe cat-back. it made about 176whp/168wtq (I don't have the paper in front of me at the moment, I'll double check later). Paint needs some love because the previous owners didn't take to much care of it :banghead:

I think they may have left the sunroof open and it rained.



Current Mods:

ZHP Engine with 50k miles

BimmerBrake Headers

Raceland Coilovers

Meyle Control Arms (all metal joints)

Powerflex Polyurethane Control Arm Bushings

AA Tune

Headliner wrapped in black

Eisenmann Race Muffler (83mm tips)

Eisenmann connecting pipes

M3 steering wheel, wrapped in alcantara

JB Racing Lightweight flywheel



Future Mods:

Gruppe Intake

Dyno Tune

Lightweight Pulleys

Wheels

Much More!



I know there will be people who tell me to invest the money into getting an M3, 330i, or something along those line. I might but for right now this is just an experiment. If you guys have any recommendations let me know. I'd be going to AA for the Dyno tune because I'm near them, but I've also been searching for someone to tune my car with better results if possible.
 

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Dump the racelands and the aa tune, certainly don't waste money on any aa dyno tune. AA got killed a few years ago in a heads up dyno shootout against the shark, aa then reworked their tune to try to beat the shark a second time, they failed again.
 

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Discussion Starter #3
Dump the racelands and the aa tune, certainly don't waste money on any aa dyno tune. AA got killed a few years ago in a heads up dyno shootout against the shark, aa then reworked their tune to try to beat the shark a second time, they failed again.
If not an AA tune, who would you recommend to tune my car?
 

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Lol get ready for one of the more real responses you will get on this board.

#1 welcome. I'm going to treat you as a new member because I've never seen you post before so i feel as though a welcoming is the least I can do to keep you in high hopes.

#2 I wouldn't advise you to start off your thread with "I want to make my car as fast as possible." That sounds silly (no offense) because making your car as fast as possible and then following it with "but retain its drivability" are absolutely contradictory of themselves in the BMW world you have imaged in your head. Plus the older crowd will frown upon said statement because they will have the impression you are a typical "kid enthusiast" who's gonna make a rice can of a vehicle.

#3 Going to give you some reality, and I will be one of those people that you mentioned that will tell you that invest your $ into a AT MINIMUM 330i/ci for one main reason from the standpoint you are looking at it from which is hp per $. You have gone through thus far trying to source parts from a b30 motor to try and make some power out of your b25. A stock 325i dynos at 160whp. You claim to have 174whp. You replaced the manifold and throttle body with 330 ones, added headers, and AA tune (which is very ill advised on these boards as they are absolute garbage) and gained 14whp. I know the tune and bimmerbrake headers net you $600+ not even including the cost of the manifold or throttle body. Now you want to ditch the AA tune (good choice) for a dyno tune which will, at minimum, cost you another $600 and will give you maybe an additional 5whp from what you have now. I hope you see where I'm going with this..

#4 My advice, not that you have to listen to a word I say as I'm not your father but just a random guy on the internet trying to help what seems to be a fellow enthusiast out. Anyway my advice, save the $ u have, stop dumping it into the hp figures of your car and get rid of those god awful race land coilovers and buy a set of real coilovers or a simple h&r cup kit. Enjoy the nonM how it was meant to be enjoyed, in the turns. You spent all that $ thus far (not including labor unless you did it yourself) and you're still slower than a stock 330. Speed in a straight line isn't shit til you hit a turn. And with those awful race land coilovers, you ruin the handling of your vehicle dramatically. There is a reason why they are $200 vs even a cup kit which includes very reputable brand names are $500-$700. You're just going to be driving a loud 325ci revving high in the power band to have a false illusion of power because of vroom vroom noises. Trust me you don't want to be that guy. Now not once am I going to say go buy a M3 or 330, you can have plenty of fun in a 325i with the right mods (key word RIGHT) But seeing as though you have over 200k on a motor which is prone to multitudes of leaks and ring issues at higher miles, trying to squeeze every bit of power out of it is not at all the smart thing to do from a financial standpoint when you can have a faster stock car in a 330 and still out handle your car currently on stock suspension vs racelands.

Hopefully you take my advice into consideration but ofc it is your $ and your car so ultimately the decision is up to you. I wish you luck in your goals though and I hope any other og on these boards advises you the same


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Ironman
01 330iT 6MT, 98 M Roadster
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Not a whole lot to add to that excellent advice, but I will add this...

Yes, you can make more power with a 325. Racers do it. But it's a VERY different story for a race car than a street car. In racing, there is a rule book, and you build what you have in your class. On a street car, you don't have those restrictions. You can buy a better car, do an engine swap, or go forced induction - all things you typically cannot do with a race car, built to compete within a given class. From a cost effective standpoint, get a different car or even do a B30 swap. Otherwise, you will be throwing away a LOT of money and in the end you'll say "I should have bought an M3."
 

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Discussion Starter #6
Lol get ready for one of the more real responses you will get on this board.

#1 welcome. I'm going to treat you as a new member because I've never seen you post before so i feel as though a welcoming is the least I can do to keep you in high hopes.

#2 I wouldn't advise you to start off your thread with "I want to make my car as fast as possible." That sounds silly (no offense) because making your car as fast as possible and then following it with "but retain its drivability" are absolutely contradictory of themselves in the BMW world you have imaged in your head. Plus the older crowd will frown upon said statement because they will have the impression you are a typical "kid enthusiast" who's gonna make a rice can of a vehicle.

#3 Going to give you some reality, and I will be one of those people that you mentioned that will tell you that invest your $ into a AT MINIMUM 330i/ci for one main reason from the standpoint you are looking at it from which is hp per $. You have gone through thus far trying to source parts from a b30 motor to try and make some power out of your b25. A stock 325i dynos at 160whp. You claim to have 174whp. You replaced the manifold and throttle body with 330 ones, added headers, and AA tune (which is very ill advised on these boards as they are absolute garbage) and gained 14whp. I know the tune and bimmerbrake headers net you $600+ not even including the cost of the manifold or throttle body. Now you want to ditch the AA tune (good choice) for a dyno tune which will, at minimum, cost you another $600 and will give you maybe an additional 5whp from what you have now. I hope you see where I'm going with this..

#4 My advice, not that you have to listen to a word I say as I'm not your father but just a random guy on the internet trying to help what seems to be a fellow enthusiast out. Anyway my advice, save the $ u have, stop dumping it into the hp figures of your car and get rid of those god awful race land coilovers and buy a set of real coilovers or a simple h&r cup kit. Enjoy the nonM how it was meant to be enjoyed, in the turns. You spent all that $ thus far (not including labor unless you did it yourself) and you're still slower than a stock 330. Speed in a straight line isn't shit til you hit a turn. And with those awful race land coilovers, you ruin the handling of your vehicle dramatically. There is a reason why they are $200 vs even a cup kit which includes very reputable brand names are $500-$700. You're just going to be driving a loud 325ci revving high in the power band to have a false illusion of power because of vroom vroom noises. Trust me you don't want to be that guy. Now not once am I going to say go buy a M3 or 330, you can have plenty of fun in a 325i with the right mods (key word RIGHT) But seeing as though you have over 200k on a motor which is prone to multitudes of leaks and ring issues at higher miles, trying to squeeze every bit of power out of it is not at all the smart thing to do from a financial standpoint when you can have a faster stock car in a 330 and still out handle your car currently on stock suspension vs racelands.

Hopefully you take my advice into consideration but ofc it is your $ and your car so ultimately the decision is up to you. I wish you luck in your goals though and I hope any other og on these boards advises you the same


Sent from my iPhone using E46Fanatics


Firstly, I don't have any sort of "BMW" world imagined in my head... I previously worked at a performance shop that specialized in BMWs and I am fairly familiar with this world lol. None the less, what I imagine in my head is what I want- not some world. Just because I want to buy a 325i and build it to be faster than most people expect doesn't mean in some world I've created for myself.

I guess maybe I didn't write what was in my head well enough. My car made 176WHP / 162 WTQ STOCK. Not modified. STOCK. In 90 degree Florida weather with 52% humidity. I plan on changing the coilovers to much better quality coilovers once I finish maintenance for the things I have to fix. Maintaining the car comes first. The only reason I bought racelands was because my shocks in the front and rear were faulty and I had to replace them. I'm not looking to make 300 horsepower or anything insane. I'm realistic and I know I won't make more than 220, and that's hopeful. I just like the challenge. If I wanted to make power and go in a straight line I'd sell my car and buy a different one. I haven't dynoed my car since doing these modifications, but I enjoy the extra pep so far. I don't care if the older guys call me a ricer. Sometimes I will be able to afford expensive parts, and sometimes I won't. Although I love my car and want to pour money into it, I still want to live a life lol. I also plan on getting a more quiet exhaust. Having a really loud car is fun sometimes but I would like something more refined.
The reason I got the straight pipe was because that was what I could afford at the time and I didn't think I'd be putting Catless headers on the car.

To address your second point, I want to make it as fast as possible while retaining reliability. If sacrificing more reliability means for performance, then I won't go any further. I thought I got that point across.

I work at a reputable performance shop, I know what it takes to make power and what I "should" do but this is what I want to do.

Thank you for the advice and welcoming. I posted this thread for some advice, and if that's what you want to give I'll take take it.


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Discussion Starter #8
Update: a little over a year later;

I’ve replaced the steering rack due to a enormous leak, I now have an black alcantara M3 steering wheel, rewrapped my headliner in black, UUC short shift kit & DSSR, and recently ordered a full eisenmann catback system.



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Some nice parts, you will not break 200hp with less than 2k though. F/I is the only feasible way.
 

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Discussion Starter #11 (Edited)
325ci NA build

Some nice parts, you will not break 200hp with less than 2k though. F/I is the only feasible way.


Thanks. We’ll see. I may end up swapping a 330 motor into it, I have some white smoke coming out of the exhaust :/ gunna get it looked at soon. If I do swap the engine, I definitely wanna see how much this motor is making with these mods :D


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Discussion Starter #12
Put the eisenmann on the car last night. Looks and sounds amazing!

e5811f25-e30f-4e92-845d-31526d97f43d.jpg

Unfortunately, as we were revving it the radiator cracked right at the expansion tank.. guess that’s next.

I’ll be posting a video of the exhaust once she’s back on the road again


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Discussion Starter #13 (Edited)
325ci NA build

Not sure how I can add videos on here. Once I figure that out I’ll add some clips of the exhaust.

Finally put in the Alcantrara wheel
IMG_0606.jpg

I’m so much happier with the way the back of the car looks with the eisenmann tips!
IMG_0647.jpg


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Discussion Starter #15
Have you done any performance mods since a year ago? Do you have an external link to the video with the new exhaust?


Only performance mod I’ve done is the eisenmann, if you can consider it that.

I’ll have to post it on YouTube first I guess, then I’ll post the link


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Discussion Starter #16
Still working on finding a GoPro to use for the exhaust clip.

In other news, I was able to find a ZHP engine from a 330 with 57k miles in my area. Quickly got a hold of the seller and brought it home with me yesterday!

57400997432__ACFC04B6-0258-42B9-80C6-0B8202F251E2.jpg

Thinking about my options in terms of mods now that I have the engine out. Any recommendations?


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Discussion Starter #17
A lot has happened since. Did a bunch of preventative maintenance on the car for the swap- Oil gaskets, crankshaft seals, spark plugs, engine & transmission mounts, shifter bushings, and clutch. Then went on to do performance mods. Nothing crazy, just a DSSR, short shifter, and lightweight flywheel.

64EFCCC0-A464-422B-BBDA-633611BCA541.jpg
IMG_1392.jpg IMG_1393.jpg
IMG_1784.jpg

Got the engine in and ecu mapped by active. Love the way she runs now! More to come!

Time to move onto some interior/exterior mods

Wish I could post a video on here without having to go through the hassle of using another party’s video services.




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