Quote:
Originally Posted by strati1
Honestly the only gains you can extract are scoops and intake then exhaust, this combined with the right dyne will give you not even a 10% gain. Save your money buy a decent suspension and some sticky tires then go find a windy road a see what our 1 series was meant to really do.
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headers/midpipes/muffler (preferably all with a cat delete
) should get 10% pretty easily alone
5% tune
5% intake
all roughly...
pity cams/turbo kits/aftermarket forged pistons were never developed for these engines
this is on a 130i, too which is 265hp stock (gets 240-250 to the wheels approx, stock) and i believe... considering the 128i is 230hp... well a simple tune (and intake swap i believe?) will get you +50hp.
supercharger kit if you want +100-150whp at least? :P
so considering 180rwkw from 195 at the fly (super impressive!).. 93% efficiency means 200rwkw you only need 216.6 at the fly, so yeah tune/full exhaust/intake will easily do it for you.
supercharger is apparently 330-350hp atw everything else stock on the lower powered USDM N52B30's... so that's 260kw atw :P. i'd imagine somewhat more available witha 2.75-3" catless exhaust..