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I haven't read this complete thread so this might duplicate previous info. Heads up for installing Nav update NA 2-20 on a 2018 Mustang with Sync 3.0 build 20204 using the Ford supplied USB drive. I don't know if the process is the same with the DIY download files. The process included two...

Sam - Was the initially bitey just driving around even more than the "normal" S550 light braking touchiness, especially with the 6 piston Brembos on the GT PP1?

FYI I've driven 10's of thousands of miles and at least 500 autocross runs using 275/35x19 RE-71R's Front and Rear on my previous 15 GT PP and now my current 18 GT PP1 stock size 9" Forgestar front wheels. Currently I have a new set of Falken RT-660's on the 9" F and 9.5" R Forgestars. NOTE the...

From the 2020 Mustang Order Guide  EcoBoost® Handling Package (Available on Fastback only) • 19” X 9.5 Aluminum Wheel • 265/40R19 Pirelli Corsa4 (Summer Only)

Good point and thanks for the picture and the correction on the max recommended rim width being 11.5" so not "stretched" on 11's according to mfg/industry specs. One thing I see from that picture and others I've seen is that the "rim protector" on the RT-660 is very similar in appearance to the...

Thanks! I wasn't thinking about the camber you would have in CAM but agree that makes a big difference, especially with the tire stretched on the max recommended wheel width..

Great job! I'm in FS with 9" F and 9.5" R wheel width. From your experience/observation of the feel and appearance of your 295's on 11's do you think the 275/35's F & R on my wheels would be about as "happy" as the 275/35 RE-71R's were vs go down to 265's on the fronts? Thanks!

Thanks Steve, 1) It sounds like both the A052 and the RT-660 275/35x19 will at least appear to be pinched/squeezed on my 9" front wheels even though 275/35 for many folks even 285/35 RE-71R's were "fine". 2) Most of the events I'm likely to run will be in 70 - 95 deg plus NC summer weather...

How was the tire wear and will you be driving on them to/from events? Also how was the steering response compared to the BFG's which have a "lots of slip angle required compared to RE-71R's" reputation? FYI I'm still in FS so I would be on 275/35x19's with 9" F and 9.5" R wheels. Thanks!

Per the footnotes it appears the tires have to be purchased from GY.com and installed at a GY tire store or independent "authorized" dealer rather than "just any" independent installer. Has anyone tried an installer such as Discount Tire and if so did you get "free shipping"? I haven't joined...

FYI according to some highly qualified autocross tire experts as good as the PS4S tire is unfortunately is it NOT good at resisting tire edge wear. The sidewalls are just not "stiff" enough to resist the "roll over" forces of dry pavement autocrossing like RE-71Rs, Rivals, etc.

1967 - 1971 Army Security Agency crypto tech including 68-69 on the DaNang, VN airbase.. Ordered my 69 Mustang from the DaNang PX.

FYI "rev hang" can also be needed for emissions reduction. Sudden closing of the throttle can cause spikes in emissions. One of the solutions in the 70's was the use of dashpots to slow throttle closing. The delay in some cars was very annoying to skilled drivers. I'm pretty sure that I've read...

Thanks guys. I'll stick with the factory supported version which is designed for my car's hardware out of "general principles" plus the fact that I haven't seen anything about the newer versions which tempt me.

FYI my "early" (built late December 2017) 2018 came "I think" with map version 1-17 since the Ford NAV website confirmed that the new version was available when I checked early this year. The map version on the main "sync version" screen changed to 1-18 with that NAV update and to 1-19 with...

Thanks guys! Now I know not to keep looking for it.

My car is a MY 18 currently with 3.0 build 19025. Do you know whether or not 3.4 will be officially available to MY 18 and it so what "features" or "fixes", etc. are included that my current 3.0 doesn't have? Note that my car is a "base" GT PP with 301A plus Navigation in case that makes a...

I did and it worked on the second or third attempt which might have been the first time I did it correctly.

See my post #577 and the previous and subsequent posts around #577 by others and by me. Basically a master reset followed by repeating the installation instructions with one minor change worked for me. The change was to wait several minutes rather than the specified 15 seconds before restarting...

If the wheels are "not stock" look for any "sheet metal rotor retainers, AKA "Tinnerman nuts" on the lug studs. Many non-stock wheels do not have recesses in the hub mounting surface to clear those retainers. Also as others may have said make sure that the wheel is tight against the hub before...