This is prolly the best thread to put this in. My latest built in FE mod was to replace the 15" wheels and tires with 14" HX and Insight rubber. Here is what the car looks like now...
The tire diameter is 2" less than the previous tires so the car is 1" closer to the ground as a result. The old wheel/tire weighed 34.5 lbs each, the new ones are 24.4 lbs each for total unsprung weight reduction of 40 lbs!
I made a quick calculation and changed the SuperMID distance parameter before going out to finalize the calibration by 40 miles of highway driving via the milepost method. After another small tweak, methinks I am calibrated.
Initial driving impressions...
Good stuff
- Easier to steer, less rubber on the road
- Easier to start from a stop and easier to accelerate according to the buttometer
- Quieter ride, bumps are less sharp even at 62 PSI.
- Rolls much farther when coasting
Bad stuff
- Less rubber on the road
- Cornering ability greatly diminished, oversteer !!!
- Nearly spun out on two occasions, need to reduce speed on curves
- I can only imagine what it will be like in the rain.
Initial FE impressions...
- Good stuff
- The trip to the inlaws was 73MPG (warm start) vs 62MPG (cold start) (pre belly pan) similar temps (52F) and winds.
- The trip around the park was 82.9 MPG vs 72.0, again similar conditions although I made one of the lights this time.
So far I am happy as long as I don't kill myself on a guardrail. We shall see what the commute data looks like. Next two days should be dry and moderate temps. I will update in the FE update thread.
krousdb 
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