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Old 10-07-2015, 01:57 PM   #36 (permalink)
jray3
Karmann Eclectric
 
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Join Date: Feb 2010
Location: Graham, WA
Posts: 165

Odysseus - '00 Honda Odyssey

MR BEAN - '12 Mitsubishi i-MiEV SE

Karmann Eclectric - '71 VW Karmann Ghia Electric Conversion

BOB - '87 Ford 250 Lariat ext cab
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Quote:
Originally Posted by cyclopathic View Post
I think what is going on that at higher speeds there more slippage as tire doesn't get enough time to bend into optimal shape (is it also a reason why too much pressure could be bad?) ]
Amen on slippage. The iMiEV has skinny LRR tires that I run a bit tight (44 psi). High speed sweeper turns with the ASC turned off feel just fine with no howling tires and don't feel loose to me, but switch the safeties back on, and the nanny systems intervene! I didn't think the car was loose enough on a 60 mph turn to kick in the calipers, but the wheelspin sensors don't lie! Tire wear has also indicated slippage, as though the 145 mm fronts scrub hard in turns, it is the 175 mm rears that wear faster on this RWD car! Weight distribution is 45/55 and the rear has 20% more rubber, so that's proportional, but the relationship between load and traction is non-linear. Perhaps the relationships between load and wear and contact area and wear are also non-linear.
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2012 Mitsubishi i-MiEV, 112 MPGe
2000 Honda Odyssey
1987 F250 Diesel, 6.9L IDI, goes on anything greasy
1983 Grumman Kurbwatt, 170 kW "Gone Postal" twin
1983 Mazda RX-7 electric, 48 kW car show cruiser
1971 VW Karmann Ghia electric, 300 kW tire-smoker
1965 VW Karmann Ghia cabriolet, 1600cc
Have driven over 100,000 all-electric miles!

Last edited by jray3; 10-07-2015 at 02:26 PM..
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