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      09-14-2009, 01:22 PM   #1
CSanto
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Negatives of performance modifications?

I've read many threads about doing header back exhausts, ecu flashes, pulleys, etc, and I was wondering if anyone has experienced any downsides to doing them.

Any awkward sounds? Are the pullys safe? Do your exhausts rattle? Smell? Sound cheap?
That's the one thing I'd hate to do would be cheapen the look and feel of my car. I'm pleased with the Eisenmann product because it doesn't cheapen the look of the tips at all. Although sometimes, I kinda wish I just kept it stock.

I feel like this car is very good stock, and I don't want to do anything that may mess with its symmetry.
Even my wheels disrupted some balance, I can feel it. (but I do love the way they look)
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      09-14-2009, 01:23 PM   #2
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P.S. I went 19s too, if I went to 20's I probably would have sold them by now.
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      09-14-2009, 01:39 PM   #3
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There is always a trade off of some sort when modifying a car. I typically choose the highest quality components, especially those from OE suppliers to BMW. Bilstein, BBS, ATE, Alpine, Sachs, etc. This helps cut down on fitment issues and typically they have very high tolerances.
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      09-14-2009, 01:41 PM   #4
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Quote:
Originally Posted by HREM3 View Post
I've read many threads about doing header back exhausts, ecu flashes, pulleys, etc, and I was wondering if anyone has experienced any downsides to doing them.

Any awkward sounds? Are the pullys safe? Do your exhausts rattle? Smell? Sound cheap?
That's the one thing I'd hate to do would be cheapen the look and feel of my car. I'm pleased with the Eisenmann product because it doesn't cheapen the look of the tips at all. Although sometimes, I kinda wish I just kept it stock.

I feel like this car is very good stock, and I don't want to do anything that may mess with its symmetry.
Even my wheels disrupted some balance, I can feel it. (but I do love the way they look)
I can understand where you're coming from.

Therefore I'm doing basic bolt-on's and also an ECU upgrade which just enhances the M3's performance levels with all my mods. Unfortunately, I hate the quietness of the stock exhaust note, so therefore I want a total change in that department.

I'm not doing springs or spacers because of the similar reasoning you make. I just don't feel comfortable messing with the stock suspension.
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      09-14-2009, 02:02 PM   #5
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There will be some trade offs but it all depends what you are looking for.

There are definitely some wheels and exhausts on the market that may ruin the symmetry of your car. From looking at your signature it seems that you have chosen two solid companies so far (For your wheels and Exhaust).

In every market there are going to be companies who's aftermarket parts are not "up to par" (the negatives will definitely come out at this point). You seem like you have been doing a good job choosing companies who can offer you quality products that do not compromise everything you have come to love about your M3, just keep researching before you purchase and you should be fine.

If there is anything I can help you with in the future please let me know.

Continue to enjoy your car!
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      09-14-2009, 03:00 PM   #6
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So far the only down side to my mods is that my tires HATE me .
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      09-14-2009, 03:07 PM   #7
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happy with all my mods so far.... although most have been very subtle mods aside from full exhaust system... But it's so much fun to make some noise with the car. The one big mod I've just done was install a double DIN stereo, since my car didn't come with iDrive. Quite an extensive mod, but I plan on keeping the car for a long time so the benefits are worth it. In fact the only negative is that it doesn't look like a stock dash anymore. But it can always be put back sometime in the future if I decided I don't want it anymore.
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      09-14-2009, 04:05 PM   #8
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If you buy quality products from well known companies/vendors, you should not have any issues.

I did the suspension on mine with KW coilovers and it's the best mod I've ever had. The car feels unbelievable in the corners with this suspension setup.
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      09-14-2009, 04:26 PM   #9
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I did the suspension on mine with KW coilovers and it's the best mod I've ever had. The car feels unbelievable in the corners with this suspension setup.
+ 1 KW's are amazing.




.. and so is the AA Signature Line
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      09-14-2009, 05:14 PM   #10
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So far the only down side to my mods is that my tires HATE me .
Ha!
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      09-14-2009, 05:35 PM   #11
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Quote:
Originally Posted by J08M3 View Post
happy with all my mods so far.... although most have been very subtle mods aside from full exhaust system... But it's so much fun to make some noise with the car. The one big mod I've just done was install a double DIN stereo, since my car didn't come with iDrive. Quite an extensive mod, but I plan on keeping the car for a long time so the benefits are worth it. In fact the only negative is that it doesn't look like a stock dash anymore. But it can always be put back sometime in the future if I decided I don't want it anymore.
Any pics of this?
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      09-14-2009, 06:04 PM   #12
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well my plan is

Meisterschaft Gt, Fabspeed HFC /w res, Pulley, Air filter and Tune

I want springs & spacers, but im also iffy on touching the suspension now
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      09-14-2009, 07:20 PM   #13
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Any pics of this?
yep:
http://www.m3post.com/forums/showpos...2&postcount=36
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      09-14-2009, 08:52 PM   #14
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Nice job! looks good.
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      09-14-2009, 08:56 PM   #15
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Looks much better than having a 2nd HUMP in the middle.....Since that's how BMW originally does it with their Nav.
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      09-14-2009, 09:02 PM   #16
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That came out looking really, really good. You get all the added features and user-friendliness of an aftermarket navi system plus the aesthetics of the one-hump dash.
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      09-14-2009, 09:19 PM   #17
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I visit the gas station to often
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      09-14-2009, 09:56 PM   #18
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Quote:
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I feel like this car is very good stock, and I don't want to do anything that may mess with its symmetry.
Even my wheels disrupted some balance, I can feel it. (but I do love the way they look)
Mods are always going to bring drawbacks (sometimes obvious; others not). The issue is you have to be willing to live with them. Only problem is many times you won't know the answer until you try them. And at the same time you learn to apply those successes and mistakes to future cars.

I learned NO aftermarket exhaust will be as quiet as stock inside the cabin, and the M3 is perfect there IMO, so resisted the urge to make yet another mistake and stayed stock. Just painted the muffler black, and that took care of basically the only aesthetic problem I had with my car. Similarly, I couldn't justify other mods like SSK, wheels, tune, etc. It's incredible how good this car is right out of the box . I just did minor stuff, like pedals, fog switch, mats, tint, etc.
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      09-14-2009, 10:00 PM   #19
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^ hahahehe.....I wish I could keep it simple like you. Unfortunately I turned out to be the complete opposite!

The quietness of the stock exhaust was frustrating for me. I just had to have that adrenaline pumping exhaust note.
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      09-14-2009, 10:09 PM   #20
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The quietness of the stock exhaust was frustrating for me. I just had to have that adrenaline pumping exhaust note.
oh hell yes! I felt the exact same way. Stock is fine but I wanted a bit more balls when I mashed the throttle.
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      09-15-2009, 02:16 AM   #21
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Quote:
Originally Posted by J08M3 View Post
Quote:
Originally Posted by Nawaaz View Post
Looks much better than having a 2nd HUMP in the middle.....Since that's how BMW originally does it with their Nav.
Quote:
Originally Posted by TLud View Post
That came out looking really, really good. You get all the added features and user-friendliness of an aftermarket navi system plus the aesthetics of the one-hump dash.
I agree! Very nice. Any other threads on which components and other steps involved? This is sweet!
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      09-15-2009, 06:12 AM   #22
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Quote:
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That came out looking really, really good. You get all the added features and user-friendliness of an aftermarket navi system plus the aesthetics of the one-hump dash.
thanks
Yea, and for less money than iDrive.
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