Quote:
Originally Posted by plucas
Real world testing can defiantly be used. Coast down test aren't perfect but if done right can get very good results. I always just forget to mention it since I do computational analyses 
I would be very interested in helping with some real world coast testing and compare this to computational results. |
I would definitely be interested in that. I think a simple system of a front and rear ultrasonic ride height sensor along with a GPS speedo would probably be sufficient for basic correlation work.
Quote:
Originally Posted by EarlQHan
To be honest, I think you guys are overthinking a very simple matter. These are low-powered, production-based, closed-wheel cars. The aero effect is more than likely negligible for a 7.5" wide wheel vs. a 9" wide wheel. The tire is the important part, and assuming you make a similar increase in tire width, the additional grip will overcome the drag and inertial forces in lap times. And that's the thing that really matters here; sometimes it's really easy to lose sight of that.
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Agreed, I had a reading comprehension problem.
Quote:
Originally Posted by Captain Insano
The original person that asked about this was not talking about a static car. u/Josh was asking if the proposed road test would be ok to determine drag difference of using a wider wheel.
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Sorry, I misunderstood the discussion point you were making. I thought it was more global about coastdown testing not just the wheels portion I was just trying to through out some info on the general process. I am in total agreement with you an EQH that the aero difference of wider tires would be insignificant compared to the extra grip.