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Forced Induction Forum Sponsored by Active Autowerke
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Old 05-14-2013, 04:45 PM   #1
BimmerBuisness
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longevity of supercharged 325 motor?

Hello all I just got my first BMW (2005 325ci step). I love this car but power, though not a real concern, is something I would like to change through Supercharging the vehicle.
*
So I have been searching the forum constantly not for*people that have just supercharged their car,*but someone thats had one for a long duration of time and posted his results.
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Here is my scenario. I live and work on a mountain next to palmsprings, constantly I am having to up down left right you name it throughout my daily driving experience. Having this car is*definately a lot of fun*however when it comes time to accelerate uphill the standard delivered power makes it so I basically need to*go WOT to go uphill and gain any speed whatsoever. Im not a speed deamon, I am not some kid looking to race every single rice rocket out there,*I am just an average guy looking for a little more kick to my vehicle for my daily driving.
*
Through reading others posts I know I am going to get the Sell your car buy an M story but that is not what im looking for. I love to be unique and have something not many others have,*Also I was able to get this 325CI with 50,000 miles on it for 7k mint. Im a talker and managed to get what I wanted which was at least 40% off the what the previous owner (woman owned) wanted for it. So after saying that, having a supercharged 50,000 mile 325 for what im guessing to be around a grand total spent of*13k based off of Active Autowerkes price for their supercharger*kit seems to me to be the better option than going out and buying a high mileage m3 that has been WOT >50% of its lifetime. Everyone that has an M3 out here is a kid smashing the hell out of it.
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My true concern is longevity of the motor afterwards. Knowing im not a speed deamon, that im not going to be WOT Max Boosting all the time, that it was driven by a mother with kids since it had left BMW's lot. Do any of you see any reason why this would be a bad choice for my daily driver? Has someone driven their supercharged bmw 50+ thousand miles and has had no issues?
*
All advice, even talking me out of the supercharger,*except go buy an m3, is appreciated
Thank you all for your time.
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Old 05-14-2013, 05:01 PM   #2
AndyN
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Go for it, I got around 15000 miles from my stage 2, 325. The engine gave in at 150,000, yours is allot lower so should last you many many years, I am currently replacing my 325 with 330, should be running on sat can't wait! Go for it and go ess, twin screw will have low down torque which is what the 325 really needs...

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Old 05-15-2013, 09:35 AM   #3
BimmerBuisness
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Glad to hear someone got some mileage out of their motor. My goal is to make this car last as long as yours with a supercharger on it. Stage 2 seems unnecessary for me though, I never do anything in a straight line besides cruise control. Any other recommendations?
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Old 05-15-2013, 06:36 PM   #4
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longevity of supercharged 325 motor?

15,000 miles on a supercharger and 150,000 total miles seems rather short for a motor. Seems that something was not right with your setup.

I have a 330 and over 90,000 boosted miles and 126,000 overall miles. ESS stage 2 twin scroll kit.

Lots of track days, autocrosses, and mountain runs. You should be fine. I prefer to stay away from AA as it seems they have more quality control issues than others but it's your money.


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Old 05-15-2013, 07:09 PM   #5
AndyN
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Yes it was very short. Lost compression on 3 cylinders. Hope the 330 lasts longer!

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Old 05-16-2013, 05:23 PM   #6
Minnoe07
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longevity of supercharged 325 motor?

I certainly hope so!

I'll let you know when I hit 150k miles.


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Old 06-03-2013, 08:01 AM   #7
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longevity of supercharged 325 motor?

I want to supercharge my 325 because it's much too slow but I don't have a choice because I like wagons! You have a coupe so you have a choice! Buy an M3 and don't worry about the reliability!
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Old 06-03-2013, 08:27 AM   #8
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Supercharged my 328 recently with 138k miles on the clock. Went with stage 2.5 kit from active (their stage 2 plus meth) and have been told that it should hold up so long as I'm not tracking the car or dogging it on the highway. Given that I have babied the car from day one, I'm expecting that it holds up but we shall see.
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Old 06-03-2013, 08:44 AM   #9
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get your tune straight yet?
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Old 06-03-2013, 08:46 AM   #10
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Quote:
Originally Posted by JohnBlaze View Post
get your tune straight yet?
Need to get it squared away this week (so I can drive up for the OC show). RRT wanted to make sure everything mechanically looked right before throwing it back on the dyno. I have the tuning cable from Active so will have it done by Zak (via remote tune) over at Mach V motorsports with RRT on hand for guidance.
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Old 06-03-2013, 08:50 AM   #11
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sweet
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Old 06-03-2013, 10:08 AM   #12
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Re: longevity of supercharged 325 motor?

Quote:
Originally Posted by 2000_328CI View Post
Need to get it squared away this week (so I can drive up for the OC show). RRT wanted to make sure everything mechanically looked right before throwing it back on the dyno. I have the tuning cable from Active so will have it done by Zak (via remote tune) over at Mach V motorsports with RRT on hand for guidance.
LEGIT

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Old 06-03-2013, 05:43 PM   #13
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Nothing wrong with supercharging a 325. I would pick ESS twinscrew over AA but it's just personal preference. In fact I had stage 1 on the 325 and made 243whp.
Wait a minute, is your car an automatic?
Nevermind. Sell it (probably for more than you paid) and get a faster car.
Don't get hung up on the mileage. It's not that important. The engine internals are not likely to fail. If you get high mileage 330 or M3 and spend $1K on engine maintenance (all gaskets and sensors) it will be as good as low mileage.
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Old 06-04-2013, 10:46 AM   #14
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The automatic transmission is going to be the bottleneck here, and if and when it fail with the added power, you will be stuck.

But there have been people who has gone that route then swaps their transmission and rear end with an m3 rear end and 6 speed transmission for as low as 1800 buck in parts and their own labor.

Its your call and your money. I think it will hold for awhile and not give you trouble for a couple of years. Its too bad its not a stick so you can get the most out of it, as boost is very addicting..once you get it, you will always want more..to squeeze out just a little more...it will never truly be fast enough


good luck!
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Old 06-04-2013, 05:53 PM   #15
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I've had mine supercharged since 60,000 Kms, and am sitting at about 75,000 Kms - so far so good, and still like the day it was boosted
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