3,563 reputation
729
bio website
location Cambridge, MA
age
visits member for 2 years, 3 months
seen Oct 9 at 19:20

Dec
4
comment Assuming identical and sufficient ABS, and ignoring aerodynamics, are tires the only factor for braking distance?
@andrewb re: tire load sensitivity. I was just going to recommend Milliken and Milliken's "Race Car Vehicle Dynamics" which explains that as load on a tire increases, the friction force generated by the tire increases in a less-than-linear fashion. This allows for tuning the under/oversteer balance using roll bars, and also explains why a heavier vehicle won't stop as short as a lighter vehicle. Also, you can extend this to find that a car with a stiffer suspension, which transfers less weight forward under braking, will stop shorter because all four tires are more evenly loaded.
Nov
25
awarded  Notable Question
Nov
22
reviewed Looks OK Should I replace the Timing belt in 2004 Kia
Nov
22
reviewed Close How much money to spend maintaining a 12-year-old Civic
Nov
22
reviewed Leave Open 1982 Yamaha Virago 750
Nov
22
revised Oil in coolant none in oil
formatted for readability
Nov
22
comment 12v Acc/Switched vs 12v Always On
@cde i gots an idear...it uses only the cigarette lighteror some other always-on source...detect the voltage coming in--if it's over ~13V, assume the car is running, and power your accessory. If it's less than 13V, assume the car is not running and start a timer to shut off your accessory after some period of time. No modification of your vehicle wiring necessary!
Nov
22
revised Idle sometimes too high (BMWM50B25TU)
add vehicle type to question text
Nov
20
comment At what level does low oil prevent vtec from working?
If your oil level is between the min and max marks, the oil level should not be impacting the VTEC operation.
Nov
20
answered 12v Acc/Switched vs 12v Always On
Nov
19
comment How can I repair cracks in leather seat?
Are the cracks all the way through the leather? Some images might help.
Nov
19
comment What is a good strategy for adding performance upgrades in phases to a 2013 Mazda 3?
+1 on tires first! I would add that most cars are biased for understeer from the factory, and that adding a stiffer rear swaybar can give a huge handling boost by dialing out some of this understeer bias.
Nov
19
revised Does tire size and/or tread wear significantly affect speed and speedometer accuracy?
added 10 characters in body
Nov
18
comment Will brake dust corrode my wheels?
I use a good hard paste wax on my wheels once a season, it makes washing brake dust off super easy, and provides an additional line of defense against corrosion.
Nov
18
answered What do relatively dirtier front hubcaps indicate?
Nov
18
comment Is there a risk of a spark igniting hydrogen when removing or installing a battery?
Hydrogen is odorless, i.e. no acrid smell. Also, the reason for making the final connection to a chassis ground rather than the battery is simply to decrease the chance of igniting any hydrogen around the battery. The chassis ground and the battery negative terminal are at the exact same electrical potential. There is essentially no resistance between chassis ground and the battery negative terminal--they're connected by a big fat ground cable.
Nov
18
comment Is coolant testing necessary on modern vehicles?
While the corrosion inhibitors do deteriorate with age, the "squeeze type" tester measures only the density of the coolant mixture, and won't tell you anything about the state of the corrosion inhibitors.
Nov
18
comment Coolant boiling
I agree that this is a good course of action to take at this point. I would add that a likely cause of the problem you had 5 miles after adding coolant was that the overflow tank cap was not tightened down properly. Be sure to check that twice next time.
Nov
18
revised Radiator is getting more heated
added 5 characters in body
Nov
15
comment 06 Chevy Cobalt ls 2.2 l . Replaced B1S1 O2 sensor still having issues
its possible that the newly installed oxygen sensor failed because it was defective.