Thread: No 128i Love :(
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      02-16-2013, 02:44 PM   #414
andrey_gta
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Drives: 130i coupé ;)
Join Date: Nov 2011
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2008 BMW 128i  [5.00]
n52 German tune myths or swallowing the reality of the n52 tunes.

There was a post yesterday on e90post
http://www.e90post.com/forums/showpo...&postcount=133

This is a dyno of a USA 325i, with one stage manifold, and MSV70 dme/ecu ( from 330i, z4 3.0si) running the DS tune from germany.
In germany they gave him a before & after dyno that said 231 hp to the wheels and 301 Nm torque for the car with 93 octane equivalent. Seems like the torque is the only correct number, and it is maybe the highest i've seen for the n52.
His dynojet result suggests he has around 231-235 hp for the engine.

This surprised me since we idealize the German tuners, so I had a second look at MS tuning 125i
http://www.ms-chiptuning.de/bmw/125i-218ps30s2.html
Dyno plot: http://i764.photobucket.com/albums/x...g_diagramm.jpg

From the dyno plot, notice that HP is quoted in PS, the metric HP. Nm is used for Torque. So these @ engine approximations when converted to our HP and Ft-Lb really mean 266.3 hp and 231.2 ft - Lb torque @ engine
With a 15% loss is 226.35 hp & 196.52 ft-lb at the wheels (who knows in what correction factor eg. SAE or STD)

I know we shouldn't compare dyno's, but I think this is important to question, pay attention to what units used, what gas octane and where the measure is at.
I dont think our expectations should change, and we should still see tuned 125i/128i with 270hp, but from which tuning house?



I really should hurry with this evolve tune configuration stuff, especially with the eurobox opening any bottlenecks
So I ask for help:
Does anyone know how to use BavAuto for live readings??? There are just so many options
__________________
128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff


"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is

Last edited by andrey_gta; 02-16-2013 at 07:11 PM.