Quote:
Originally Posted by makinen
I see your point.
Surely full load output should be important to this kind of mod. The stock setup is just two rivet holes away, so I can easily restore to the stock state and have dyno sessions to make evidence for improvement. But you know that it takes some time and money. I could make some data log using Torque app rather than doing dyno tests.
Anyway, 3rd gear 80-120kph compared to the stock 86 was almost same. So at least rpm band used that test wasn't badly affected, maybe.
But the torque decrease in bottom-end could be felt easily when you just release a clutch pedal to launch a car. Another problem is that dyno tests cannot show part load outputs. Real life drivability is relied on the partial throttle region as I think.
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I like Torque a lot but it's very inaccurate and unsuitable for such measurement, IMO. A dyno session isn't really warranted either since, as you pointed out, it doesn't measure part-throttle and it is also difficult to accurately measure minute differences on the order expected here.
When you were testing, did you reset the ECU between mods and then drive a sufficient distance to allow the ECU to adapt to the mod? I submit that the perceived loss of low end tq might well have been a slight change in measured load caused by a change in MAS signal slope. Perhaps the intake mod caused a lean spot?
I suppose my point here is that I believe it to be almost impossible to accurately measure and quantify the effects of such minor changes solely by "feel". A flow bench would be ideal. Still, it is fun to experiment and if it feels better to you, than why not? Good luck with it.