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Hi All:
___A few months ago, I pumped up the Integrity’s on the 03 Corolla to 50 #’s. I was always amazed as to how far it would coast at that pressure. I had the chance to drive her to work last night and then on to pick up my son from the U of I and back home today. (The 03 Corolla without a single warm air mod was driven in 11 to 27 degree temperatures a distance of 275.4 miles on 5.995 gallons (45.94 mpg) which is just shy of my all-time high 45.96 mpg
)
___Anyway, on the off ramp from I-294 South bound to the toll-booth before you drive onto the I-55 On-ramp here in Illinois, it’s an ~ 1/3 - 1/2 mile incline to the booth. In the Corolla from 65 mph, I am still coasting at ~ 20 mph at the gate. On this same ramp in the Insight w/ the same 50 #’s in the RE92’s, I usually hit the exit ramp at 50 - 55 mph and don’t have enough momentum to make it to the booths. This is after shifting the Insight into neutral just a short distance after hitting the off-ramp. The Insight just doesn’t seem to coast as well in Neutral as the Corolla does in Drive? The Corolla is an Automatic. Does anyone have any idea as to how this could be? The Corolla’s wheel/tire combo probably has much more inertia but the car itself has Cd of .29 vs. the Insight’s .25 and the frontal area has to be 30 - 50% larger then the Insight’s. Does the Corolla’s 2,500 #’s vs. the Insight’s 1,900 #’s make any difference? I would assume mass would cancel out in the loss of energy equation in comparison to one another given the 50’ or so climb over the ~ 1/3 - 1/2 mile distance? The Corolla just seems to coast better for whatever reason and I can’t explain it given the ~ 45 mph loss at higher speeds then the Insight’s > 50 mph loss at slightly lower speeds? I will try a more scientific run while watching the GPS and hitting the ramp at the same speed the next time around but it might be awhile … Just wondering if anyone has ever felt a similar anomaly in their Insight compared to their other automobiles with similar pressure in the tires of both?
___A bit more information … While in drive and coasting, the Corolla’s RPM stays slightly above idle (1,100 – 1,200 RPM) but I feel engine breaking for the first few seconds before it just lets loose and the real coast begins. Could it still be providing propulsion with no accelerator input and at these higher speeds? Transmission creep wouldn’t explain the higher speed coasting capabilities, could it?
___The next time I drive the Insight to the fuel station, there is a jersey barrier free turnout about 1.5 miles down that I always turn around at. I will coast from a given point at an exact speed in both to test the Insight and the Corolla’s coasting abilities but the Corolla feels like it coasts a little bit better is all?
___Thanks in advance.
___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___[email:yp13t8lg][email protected][/email:yp13t8lg]
___A few months ago, I pumped up the Integrity’s on the 03 Corolla to 50 #’s. I was always amazed as to how far it would coast at that pressure. I had the chance to drive her to work last night and then on to pick up my son from the U of I and back home today. (The 03 Corolla without a single warm air mod was driven in 11 to 27 degree temperatures a distance of 275.4 miles on 5.995 gallons (45.94 mpg) which is just shy of my all-time high 45.96 mpg
___Anyway, on the off ramp from I-294 South bound to the toll-booth before you drive onto the I-55 On-ramp here in Illinois, it’s an ~ 1/3 - 1/2 mile incline to the booth. In the Corolla from 65 mph, I am still coasting at ~ 20 mph at the gate. On this same ramp in the Insight w/ the same 50 #’s in the RE92’s, I usually hit the exit ramp at 50 - 55 mph and don’t have enough momentum to make it to the booths. This is after shifting the Insight into neutral just a short distance after hitting the off-ramp. The Insight just doesn’t seem to coast as well in Neutral as the Corolla does in Drive? The Corolla is an Automatic. Does anyone have any idea as to how this could be? The Corolla’s wheel/tire combo probably has much more inertia but the car itself has Cd of .29 vs. the Insight’s .25 and the frontal area has to be 30 - 50% larger then the Insight’s. Does the Corolla’s 2,500 #’s vs. the Insight’s 1,900 #’s make any difference? I would assume mass would cancel out in the loss of energy equation in comparison to one another given the 50’ or so climb over the ~ 1/3 - 1/2 mile distance? The Corolla just seems to coast better for whatever reason and I can’t explain it given the ~ 45 mph loss at higher speeds then the Insight’s > 50 mph loss at slightly lower speeds? I will try a more scientific run while watching the GPS and hitting the ramp at the same speed the next time around but it might be awhile … Just wondering if anyone has ever felt a similar anomaly in their Insight compared to their other automobiles with similar pressure in the tires of both?
___A bit more information … While in drive and coasting, the Corolla’s RPM stays slightly above idle (1,100 – 1,200 RPM) but I feel engine breaking for the first few seconds before it just lets loose and the real coast begins. Could it still be providing propulsion with no accelerator input and at these higher speeds? Transmission creep wouldn’t explain the higher speed coasting capabilities, could it?
___The next time I drive the Insight to the fuel station, there is a jersey barrier free turnout about 1.5 miles down that I always turn around at. I will coast from a given point at an exact speed in both to test the Insight and the Corolla’s coasting abilities but the Corolla feels like it coasts a little bit better is all?
___Thanks in advance.
___Wayne R. Gerdes
___Hunt Club Farms Landscaping Ltd.
___[email:yp13t8lg][email protected][/email:yp13t8lg]