Quote:
Originally Posted by Isaac Zachary
How much for shipping? How does a stop watch give you better info? Mine must not be as accurate as yours because that's what I've been using. I tried the accelerometer and didn't find the results consistent and repeatable.
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How much for shipping what? Neither the stopwatch or accelerometer cost much, shipping included or not.
A stopwatch gives better info than a dyno because, unlike a dyno, it takes into account:
1. Real aerodynamic flows
2. Real rotating inertia within the driveline (ie unlike a dyno, ramp times precisely match gearing).
The only thing I find impossible to achieve on the road is ultra low-load tuning of ignition timing - whereas that is quite easy on the dyno.
You've repeatedly said that you can't get consistency in testing. I'd suggest that's because your testing techniques aren't very good - either in the way you do the tests or the tests you choose to do. For example, with accelerometer testing, I can easily get results that match within a few percent on consecutive runs. The tests that I suggest doing (that don't include trying to hold a constant MAP value) are highly consistent and repeatable - if they're done with care, anyway.