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      06-21-2010, 08:24 PM   #1
janus77
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How much difference do lightweight wheels and non-rft's make?

Hi All,

Am considering what to do for my next modification. I have the following ideas, am probably leaning towards wheels/tyres at this stage:

1. Lightweight wheel and ultra high performance (RE11's or something like that) wheel/tyre combo.
2. Header back exhaust system with high flow cats.
3. Custom modified intake manifold. (maybe, kinda need exhaust with this option too, infact no.4 as well so a very expensive process)
4. Computer retune.
5. Upgraded brakes - 2nd hand 135i probably cheapest option

I figure given the car's a nice weight to start with, it'd perform even better in the turns with lighter weight wheels and stickier rubber, which is a more important improvement to me than straight line performance.

Just wondering how others have found new wheels and tyres to effect the handling of the car and general feel?

Thanks
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      06-21-2010, 09:10 PM   #2
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1) lightweight wheels would be apex wheels. They are 18lbs a piece (about 10 lbs lighter than stock) and have the proper offsets for some serious rubber.

2) don't mean be a grammar Nazi but you want a turbo back exhaust as the turbos a downstream of the headers. Take your pic with this option and do some research.

3)If you want actual results make sure you get a closed cai (stett, Dinan, etc) the dual cone I takes suck in hot engine bay air and have been shown to actually loose power vs the stock airbox, and the stock airbox is pretty good to start with.

4)everybody is in a differen camp. You options include chip like jb3 (which most peeps recommend) and proceed. You can also do rme reflashes like giac or dinan, but these options are more expensive.

5) we don't have a lot of brake options. Fluid change and a switch to better compounded pads (cool carbons for street and hawks for tracks usually) or you can go with a full bbk

one more thing. The body roll in the 135i likes to trick you into thinking that the car has less grip than it does. You should add a front swaybar to our list, such as h&r, m3, or hotckis
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      06-21-2010, 09:38 PM   #3
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Quote:
Originally Posted by BrokenVert View Post
2) don't mean be a grammar Nazi but you want a turbo back exhaust as the turbos a downstream of the headers. Take your pic with this option and do some research.
You might want to read his signature again.
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      06-22-2010, 01:13 AM   #4
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Quote:
Originally Posted by Red Bread View Post
You might want to read his signature again.
+1
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      06-22-2010, 02:03 AM   #5
janus77
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Hehe, thanks Broken Vert.. i wish i could have afforded the 135i
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      06-22-2010, 05:56 AM   #6
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Ahh crap. You're looking for second hand 135 brakes. I thought you were looking for a second hand 135
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      06-22-2010, 09:49 PM   #7
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Well i'd be happy to trade if anyone's keen..
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      06-23-2010, 08:13 AM   #8
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If I could revive the the OP's original question: how much difference to lightweight wheels actually make? I understand one can improve performance by saving weight generally and unsprung weight particularly. But if you eliminate 6 or 7 lbs per corner do you actually notice an improvement in day-to-day driving characteristics? I have assumed that it is a subtle difference that becomes more apparent at the track. Agree or disagree?
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      06-23-2010, 01:27 PM   #9
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^ I'm very curious as well. I also understand all the benefits of lightweight wheels, but I wonder what the day-to-day effect is.
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      06-23-2010, 01:34 PM   #10
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2009 135i  [6.50]
The same question 2 weeks ago: http://www.1addicts.com/forums/showthread.php?t=396550
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