Quote:
Originally Posted by upstate650
thanks for providing this response! It is enlightening!
In doing a little research myself, I came across anecdotal reports suggesting that the baseline figures on a dyno for the N63 and N63TU were very, very similar, despite the TU's significantly higher published HP and TQ figures from BMW, suggesting that much, most or all of the increase was on paper, and that the N63 was severely under rated by BMW.
Any thoughts on this? If it is true, that should temper our expectations for baseline figures for the N63TU?
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Quote:
Originally Posted by AmooManiak
I'm also interested to know the opinions of the other tuners who have done baseline dynos. Most of them have the N63TU over 400 whp. I would think that most tuners used similar techniques for baseline runs (with biggest factors being mustang vs dynojet.)
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Quote:
Originally Posted by AmooManiak
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I know ours is known to read lower than most others out there. During our dyno days, we call it "Heart Breaker". Its always hard to compare dyno to dyno because of software (winpep7 vs winpep8) or if its an eddy current or what was used to lube the bearings on the roller, even tire pressure can change the numbers on a car. Its always best to do a before and after pull on the
same dyno to see your results. The gains is what its all about vs just looking at peak hp and tq.
I've listed a stock 2011 550i vs 2014 650i below
Blue Line 2011 550i n63non tu dyno'd in 5th gear
Red line 2014 650i n63tu dyno'd in 5th gear