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I think that chart is referring to tire width and not tire size (e.g. a 275/40-19 isn't 275 mm wide).

I think a piece of the puzzle you might be looking for @involutions is that lateral grip drops as vertical loading increases. Which is one reason why adding weight to a car reduces cornering performance, even though there's more weight pushing down on the tire; you might put 2x the vertical load...

"... the coefficient of friction decreases as the vertical load, Fz, increases": https://en.wikipedia.org/wiki/Tire_load_sensitivity So, (all things being equal) a wider tire will have more overall traction.

Yeah, I went the chair leg tip route with the sound tube delete on my 17. To me, the sound tube added a hooting sound of sorts (at full send) that I found obnoxious. I think removing the sound tube brought the rumble of the stock exhaust out a bit more.

Could I please get the Steeda forum/promo code? I need to stop the hop! :-P

Remembered another thing that drives me mad. If you touch the temp knob on the HVAC, it turns on the whole deal; blower and all. A lot of the time I want the blower off and just want to change the (naturally) incoming air temp. Like I have in every car for 30 years. Even worse is, if you turn...

One thing to note is that peak horsepower is not a particularly good way to convey overall engine (or car) performance. I would think some sort of 'area under the curve' value from say, 4k to red line would be a much better way of describing and comparing engine performance.

I've got the base radio, which I think sounds just fine (once I swapped in better tweeters), but the (mp3/usb) track navigation uses 4 arrow buttons instead of a rotary knob. Takes like 400 button pushes to navigate anywhere. Also, there is some configuration (bluetooth enabled?) that causes a...

I believe they are 24mm, which of course sticks way the heck out of the fender.

On the S550, Ford puts wheels with an offset of 40mm (18x8), 42.5mm (19x8.5 GT and 20"?) and 45mm front, 52.5mm rear (9x19,9.5x19 PP). So a 35mm offset is 5mm more outboard than any of the stock offsets. Don't know if this is an issue or not. It looks to me like Ford goes inboard with the wheel...

Kind of goofy that they say "no cogged supercharger belts for race cars, we want street setups you can use on the street" and then they setup the supercharger so overdriven (and way beyond recommended speed) that it slips the belt over 6500 RPM.

Another con I've read about is the tires throwing more road trash onto the paint. I think it was mentioned in one of the mud flaps/splash guards threads.

The rear PP1 9.5 is a 52mm offset. You'd need (at minimum) a 5mm to 7mm spacer to put them up front.

I saw that one last night. They take forever to put these vids out. The LS one came out like a month ago. Hopefully part 4 will be out before April... Anyone want to guess what peak HP will be on the ole Ki-Oat? I'm thinking 1200.

I think the theory is that Ford is putting a (mystery) additive in the engine at the factory that stops the cavitation noise. It's lost when the oil is changed. ETA - Found it: XL-17

Getting out, I find grabbing the rocker/rail next to the seat with my left hand and kind of pivoting out on my arm works pretty well.

Something to keep in mind is (at least on my '17), the voltage gauge is not really useful. It reads low (.5 V?) a lot of the time. The car also has some 'smart charging' technology on it which means it doesn't charge the battery to full all the time...

Perf Pack is front 9x19 ET 45 and rear is 9.5x19 ET 52.5

Another Cera Tec believer here. 17 GT PP, tick/rattle started at about 3k miles. Changed the oil at 4500 miles. Tick went away, maybe, for the first day after the oil change. Yesterday; shook the bottle well, put Cera Tec in (at 5600 miles), let her warm up 'til she came off high idle. Pulled...

Keepass that writes to a directory sync'd with Dropbox.