Thread: 128i on Dyno.
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      05-18-2012, 02:52 PM   #17
roo97ss
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Quote:
Originally Posted by 1911A145 View Post

For all others that dont understand what I was saying, Ive seen a dyno graph of the "PEAK" HP for both cars only being 30-40 hp difference. All things considered it dosnt really matter much due to different dynos and conditions, but even saying there is a 70 hp difference isnt that much better when you have twin turbos...Again, this is only peak I'm talking about, not midrange.
I agree that the 70hp difference really doesn't sound that great. The 128 is a great car, and around town, up to legal speeds that 200 whp is a good number for a car rated at only 230 hp.

However, what's that 70 peak HP equate to on the track...
these are comparos on diff days obviously but from MT/C&D
128i
14.5@96, 5.8 to 60 15.7 to 100, 31.4 to 130
14.4@96, 15.6 to 100
135i
13.3@106, 4.7 to 60 11.5 to 100
13.4@105, 11.8 to 100, 21.4 to 130

a second in the 1/4 is pretty significant as is the 10 mph, nevermind a roll race like 60-100 (3 secs), 60-130 (9 secs)

in the 1/4 (100mph) it's about 1 car length per 0.1 secs. Meaning about 10 lengths.

Your comment on the 3.0 liter twin turbos only makes 70hp more is a result of BMWs tuning. Everyone that has tuned their n54/n55 knows that the difference can very easily be 120-160 hp at the wheels. That's what the 2 turbos get you, BMW just tuned it for +70 but there's a lot of unlocked potential there without sacrificing drivability.

I'm not knocking the 128 at all. Hell my tuned 1 is slow compared to my vette but on the street you can really have the most fun in the 128. I mean you can row a few gears keep the pedal to the floor and get to the unsafe 100 mph in 16 secs. That's a relatively long time of enjoyment, but still very respectable...(it's about 1/2 that in my vette...way too fast for public roads)
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Last edited by roo97ss; 05-18-2012 at 02:58 PM..
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