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Need advice on 525i mods

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Old 12-23-2009, 04:00 PM
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Originally Posted by CWS530' post='1079050' date='Dec 23 2009, 05:29 PM
Which is better, the 535 or 550?
oh no you didn't......
Old 12-23-2009, 05:47 PM
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Originally Posted by CWS530' post='1079050' date='Dec 23 2009, 02:29 PM
Which is better, the 535 or 550?
Idk cal it depends, which one is faster?
Old 12-23-2009, 05:53 PM
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BMW should have a warning sticker 525 specific: if u drive this car, and u are under 40 u will crave more power. Please go home, save more $, and see M5.

M5 sticker: Haha gotcha beeoootttccchhh!!
Old 12-26-2009, 02:10 PM
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It is my understanding the 525 and 530 are the same engine.

Change the cam, throttle body, exhaust, and get the ECU remapped to accomodate the new parts.
Old 12-27-2009, 12:22 AM
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My advice is to sell the 525i and get something else. Trust me, i feel like I dumped a ton of money on my 525i and I still dont feel satisfied.
Old 12-27-2009, 05:23 AM
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Originally Posted by Speed_Force_E60' post='1080182' date='Dec 27 2009, 04:22 AM
My advice is to sell the 525i and get something else. Trust me, i feel like I dumped a ton of money on my 525i and I still dont feel satisfied.
It all depends on what the OP's goal is. If the OP wants to go a little but faster, then some bolt on mods are fine. But if the OP wants to go fast, that will never happen in a 525 with bolt on mods. To me, the least expensive, fast E60 is a 535.
Old 01-02-2010, 05:24 AM
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IMO - The 525i w/6 speed MT is a bit quicker than the automatic Trans.
Old 01-03-2010, 09:48 AM
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So does anyone know if it's possible to bring a 525 to 530 specs? I had a shop tell me that with 530 intake manifold, ECU flash and exhaust they can do it. I know it would be easier to just buy a 530 but would like to know if this is true?
Old 01-04-2010, 03:10 PM
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Originally Posted by egzen75' post='1083481' date='Jan 3 2010, 01:48 PM
So does anyone know if it's possible to bring a 525 to 530 specs? I had a shop tell me that with 530 intake manifold, ECU flash and exhaust they can do it. I know it would be easier to just buy a 530 but would like to know if this is true?
I'm almost positive the 525 and 530 are the same engine except the 525 was tuned down with ECU and parts to provide for a more fuel efficient 5 series. Change out the parts that are different and have the ECU programmed and you'll be set. IMO, the parts needed to be changed are the exhaust, throttle body, and cam. Then, have the ECU programmed to accomodate for those new parts. Changing out the intake manifold would help in this cause. Maybe the cam doesn't need to be changed out???
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