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Plenty of faster and "grippier" options for sure. GRM maintains and updates a good overview summary of the most common players, it's a good place to start: https://grassrootsmotorsports.com/articles/track-tire-buyers-guide/ If your tires are 2015's they are aged out in any event. New...

Either an adjustable PHB or a Watts Link will get your axle centered. Which is better is very much debated and seems to be largely a matter of personal preference. Lots of really fast guys on both. The WL allows easy adjustment of rear roll center which can be nice. Project Budget 400WHP...

Agree with others here, an S197 is a great daily driver, do everything car. I bought an '11 GT glass roof MT 5 years ago with 25K on it and now I'm at 140k. Year round daily driver in New England, ski car with snow tires, commute to work, sees 5-10 track days a year. I see about 20-22 mpg in...

Seems like it's a great time to sell my s197. The only problem is its a terrible time to buy another one to replace it!

ask and receive: https://bringatrailer.com/listing/2009-ford-mustang-22/

To me the s197 glass roof is a bigger deal than the s550 IRS or interior materials. I think the s197 as perceived through your butt and your hands actually feels lighter than it is, especially with some basic mods. But visually, because you are sitting down low and with a long hood, it feels...

If you take the stock bar off notice how much extra room there is in the bolt holes on the brace, I guess for mfg tolerances? With such a loose fit and so much space for the strut tower to move, it's hard to see how a couple 5/8" nuts torqued to 20 ft lbs or so are going to make any noticeable...

Obvious question but was the piston retracted all the way back in when installing the pads, and was the piston rotated correctly so the nubs on the brake pad line up with the cavities on the piston? It's easy to do with the proper tool but a pita without. It seems unlikely you have two...

Norm, I'm not trying to argue with you and for sure I'm no math whiz. But respectfully, yes I can follow the gist of your math and going back to your post #68, when you are talking about "torque in the vicinity of peak power rpm...", or "power varies more with rpm than torque does," those are...

Norm, you are over-thinking this. :) Putting all the variables of downstream gearing into play isn't "rigorous," it's "unknowable." There are infinite variations and possibilities from car to car. With the right gearing you could theoretically move a train with a motorcycle engine. The...

I think it's more helpful to not think about transmissions and final gearing, etc., it just puts too many variables in play. Imagine the s65 in the M3 and the coyote in the Mustang are just hooked up 1:1 to the wheels. I am pretty sure, assuming the weight of the cars is the same and you could...

For sure you are right, there are a lot of variables with the M3. But in a general sense it makes the point that a car with a LOT less torque but similar HP is posting similar acceleration times. How about the Boss vs. GT comparison? Those two cars are pretty much identical in terms of...

A little more apples to apples, the Boss Mustang is a little down on torque, a little up on HP, and accelerates a little faster than the same gen GT. Track Tested: 2012 Ford Mustang Boss 302 vs. 2011 Ford Mustang GT (edmunds.com)

You guys are making my head hurt so I had to look it up. According to wiki, the physics definition of "work" is force x. displacement (distance). HP is a measurement of power, or the RATE at which work is done. And "acceleration" is the rate of change of velocity. Focusing just at the crank...

Just my basic understanding: Torque is a measure of force, or ability to do work. HP is a measure of how quickly that force can be applied, or how quickly the work can be done. So to pull a trailer you want torque. To accelerate a car you want HP. Lots of complicating factors with gearing...

285/35/19 square will not rub anywhere if set up properly. You want approx. 10" rim with ~43mm offset.

OP, you're coming at this a little backwards. The best advice I've seen on choosing wheels and tires is that unless you are focused solely on how it looks, it's far easier and better to start by choosing the tires you want to use and then select your wheels from there. 10" wide with 285mm...

OP, Apex Race Parts has an awesome tire and wheel fitment guide you can use as a baseline for what works. I think you will be fine in front but may have rubbing in the back. I run 305/30/19 square RE71 on 50 mm offset 19x11 SVE LMR rims and they are flush with the fender in the back, no...

@modernbeat, thank you very helpful.

I'm looking at this same swap. Does swapping a used '13 or '14 rack into a 2011 require any coding? Is this a straight plug and play swap with no electronic issues?

Tab, I'm not sure about the Boss but I know on my 2011 GT the front bar is actually glued (wtf!!) to the sway bar bushings. So the effective front wheel rate likely is higher than the reported spring rate at ride height. Something about reducing squeaks. I don't think it was glued on the...

OP it would help if you could say a little more what you mean by "like a brick". If you are talking about when you go slowly over a large speed bump, straight on, the rear has no absorption, that is mostly spring rate imo. But because of the inboard spring location, in order to get the roll...

Well exhaust is good noise, these are shite noise. But your point is well taken my car is way too quiet.

In my experience any brake pad that claims to be good on both street and track kind of sucks on both. I gave up trying to find one and just swap pads. Like Norm I use G-Loc R-10 on 14" Brembos and plain Centric rotors on track and this works well for me, great bite and no fade. But I usually...