Air Pressure and Torque
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Page 208 says 101ft-lb. It was 103 for gen 2's, but seems like it's just 101 across the board now for F56/F55/F57
#6
Those 2 lb-ft of torque value difference are well within the +/-4% most torque wrenches have for a tolerance, so I wouldn't worry too much about that differential.
As for you tire pressure, set to match the door sticker first thing in the morning, when tire/air temps are likely the coolest. I typically run my tires ~3 psi above sticker readings to keep rolling resistance down and boost my MPG a little. I have never noticed any negative wear on the tires running a slightly higher pressure, FWIW. YMMV
As for you tire pressure, set to match the door sticker first thing in the morning, when tire/air temps are likely the coolest. I typically run my tires ~3 psi above sticker readings to keep rolling resistance down and boost my MPG a little. I have never noticed any negative wear on the tires running a slightly higher pressure, FWIW. YMMV
#7
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#8
2nd gen here.. I cant run recommended air pressure .. its far too high for a tiny/light car. Ive set 34 in the front and 32 in the rear.. which seems to be just enough PSI to keep my sensors from tripping. Ride quality is vastly improved vs. the 'over inflated pressure' recommended by the sticker and dealer. I didnt lose any mpg and there is no sag/droop in the sidewall at all either.
*IMO - a high wear pattern in the center of your tire typically indicates too much air pressure, causing a 'rounding' of the tread block.. wear pattern at the outer edges of the tread block typically indicates too little pressure, causing the tread to flatten and roll over the sidewall on turns.
Different tread patterns and speed ratings will tolerate changing pressure in a variety of ways. So long as your tread is wearing evenly, the PSI is "good enough" .. I think the rest is just driver preference.
*IMO - a high wear pattern in the center of your tire typically indicates too much air pressure, causing a 'rounding' of the tread block.. wear pattern at the outer edges of the tread block typically indicates too little pressure, causing the tread to flatten and roll over the sidewall on turns.
Different tread patterns and speed ratings will tolerate changing pressure in a variety of ways. So long as your tread is wearing evenly, the PSI is "good enough" .. I think the rest is just driver preference.
#9