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Thanks for your input. I'll give the R888R's a try. I know they may be a little noisier and not suitable in rainy cond. I just want to break into the 10's and I think these tires will get me there. I have a GTS and currently running 11.1's @130 tune only
I plan on testing out at San Antonio Raceway sometime soon. I considered R88R's but it's too much of a compromise with wear and they're not cheap or quiet. I bet they hook insanely well though.
I wouldn't wait for OBDII flashing, that's probably years away if it ever does come to fruition. Piggybacks don't support catless DP's, only an ECU tune because it codes out the CEL. I have no intention of running catless DP's since I think it makes the M177 sound kinda gross and raspy. If you want more sound, you could delete secondary cats (no CEL), go the aftermarket cat-back route, or get an exhaust valve flap controller that will keep the valves open 100% (I'm currently looking into this option).
I'm happy with the PS4s and can't wait to get them back on, but the R888 may an option on the 19s for the track. Thanks
Just to add in here: I did 305 Sport Cup 2, and I am wishing I had done PS4 now. They do grip, but warm up time is pretty long. I'll probably drive them this summer and then punt for PS4 at the end of the summer.
Anyone know if 275s will fit on a coupe in the front? The 305s look AMAZING in the back, but now draws attention to the fronts.
Just to add in here: I did 305 Sport Cup 2, and I am wishing I had done PS4 now. They do grip, but warm up time is pretty long. I'll probably drive them this summer and then punt for PS4 at the end of the summer.
Anyone know if 275s will fit on a coupe in the front? The 305s look AMAZING in the back, but now draws attention to the fronts.
I just had PS4 installed on my 2017 Coupe yesterday. I ended up going with 265/35/19 front and 295/30/20 rear.
They fit perfectly and drive much better than the Michelin Super Sports that came on the car. The installers told me that I could have fit 275 front and 305 rears.
'17 AMG S63 Convertible, '17 AMG C63S Edition 1 Coupe
Bump. So we have a consensus that you can definitely run 295/30/20 or 305/30/20 in the rears on a coupe. And mayzo's running 265/35/19, and it sounds like no rubbing or other issues. Anyone running 275/35/19 in the front on a Coupe? Any issues/feedback?
Bump. So we have a consensus that you can definitely run 295/30/20 or 305/30/20 in the rears on a coupe. And mayzo's running 265/35/19, and it sounds like no rubbing or other issues. Anyone running 275/35/19 in the front on a Coupe? Any issues/feedback?
Correct. I have no rubbing at all. I am pretty sure I could have gone even 10mm wider in rear without rubbing. I have put over 500 miles on these new tires and have not rubbed even once and have driven the car fairly hard. Been through all my normal canyons (Stunt RD, Decker canyon, Topanga ect...).
'17 AMG S63 Convertible, '17 AMG C63S Edition 1 Coupe
Originally Posted by mazyo
Correct. I have no rubbing at all. I am pretty sure I could have gone even 10mm wider in rear without rubbing. I have put over 500 miles on these new tires and have not rubbed even once and have driven the car fairly hard. Been through all my normal canyons (Stunt RD, Decker canyon, Topanga ect...).
Will 315/30s even fit on the stock rims?
Originally Posted by rbritt4685
Has anyone done 275/35/19 in the front of the coupe? No one really said that they had done it successfully with no rubbing....
Does anyone have any feedback ok PS4's vs Sport Cup 2's ? Which one should I go for....?
I personally would not go with Sport Cup 2’s. Aside from their super high wear rating, they’re very temperature sensitive, take long to get up to temp, and their wet traction is very poor compared to PS4S’s. Overall grip with Cup 2’s will be better under the right conditions, but it wouldn’t be my first choice for a high wear tire.
If you want the best possible traction without any care for wear or temperature, look into R888R’s or competitors in that category. With my DINAN tune, the PS4S’s 305’s hook up as well as the stock 285’s did on the stock tune which is perfect.
'17 AMG S63 Convertible, '17 AMG C63S Edition 1 Coupe
Originally Posted by AlexZTuned
I personally would not go with Sport Cup 2’s. Aside from their super high wear rating, they’re very temperature sensitive, take long to get up to temp, and their wet traction is very poor compared to PS4S’s. Overall grip with Cup 2’s will be better under the right conditions, but it wouldn’t be my first choice for a high wear tire.
Yep. I figured the graph posted above would represent that well.
If you want the best possible traction without any care for wear or temperature, look into R888R’s or competitors in that category.
...As long as you understand this is a DRY TIRE ONLY. Various forums are *littered* with stories of people driving *normally* and hitting a wet patch, losing control, and *insert vehicular disaster here*. If your weather is unpredictable, or you encounter moisture on the ground often/unexpectedly, I would NOT go with an R888. A quick Google search should suffice if you have any doubts about this. It's also why it's classified as a "Racetrack & Autocross Only" tire
'17 AMG S63 Convertible, '17 AMG C63S Edition 1 Coupe
So I needed new tires, and I went with 265s in the front, and actually had the shop bring in both the 295s and 305s. Irrespective of the math (which was 295 is proper ratio to the 265 fronts, and that the 305 is significantly taller than the 295), when mounted on the wheel, side by side, the 295 is a much thinner tire, and it doesn't match with the beefy 265s up front. So I went 265 + 305, and they look PERFECT. Definitely fills the fender gap very very nicely. And I love the look of the beefier tires. I'm also not breaking traction from a stop (coming off the line at a light) accidentally anywhere near as much. Oh, and these tires are MUCH quieter than the PSS that the car came with originally.
So that was the good.
The bad? It's definitely not as nimble, and noticeably so. Makes sense given the heavier and larger tires up front. I also am not sure how much the tire pressures are playing a role. Sticker on the gas cap door says for the 19/20 inch wheel setup, 44 lb front, 39 lb rear (IIRC). Tire shop seems to think that's REALLY high. And I know that high tire pressures can definitely make a car handle very differently. What are you plus-size guys running your tire pressures at? I was thinking of trying 38 front and 36 in the rear.
Lastly, anyone get their alignment checked? I had them check mine, and everything was spot on, except one of the specs in the front (I forget which). The shop was telling me (best wheel/tire/alignment shop in Tampa, hands down) that based on the settings, the car should be pulling to the left *significantly*. But it tracks straight, perfectly. And their experience is that when it comes to AMGs, if it drives right, leave it alone. They have weird alignment settings at time that work. :dunno:
The bad? It's definitely not as nimble, and noticeably so. Makes sense given the heavier and larger tires up front. I also am not sure how much the tire pressures are playing a role. Sticker on the gas cap door says for the 19/20 inch wheel setup, 44 lb front, 39 lb rear (IIRC). Tire shop seems to think that's REALLY high. And I know that high tire pressures can definitely make a car handle very differently. What are you plus-size guys running your tire pressures at? I was thinking of trying 38 front and 36 in the rear.
Lastly, anyone get their alignment checked? I had them check mine, and everything was spot on, except one of the specs in the front (I forget which). The shop was telling me (best wheel/tire/alignment shop in Tampa, hands down) that based on the settings, the car should be pulling to the left *significantly*. But it tracks straight, perfectly. And their experience is that when it comes to AMGs, if it drives right, leave it alone. They have weird alignment settings at time that work. :dunno:
For pressures, check the gas cap door again. If you're not going over a certain speed or whatever it says and you aren't loading the car with a lot of weight you do not need such high pressures.
For alignment, camber is set. Really I think they can only adjust toe. That's weird they think it should pull to the left.
'17 AMG S63 Convertible, '17 AMG C63S Edition 1 Coupe
Originally Posted by 4LTwinTurbo
For pressures, check the gas cap door again. If you're not going over a certain speed or whatever it says and you aren't loading the car with a lot of weight you do not need such high pressures.
Definitely not loading the car with a lot of weight. As for the speed...given this is a public forum, I'm going to plead the 5th on that one
For alignment, camber is set. Really I think they can only adjust toe. That's weird they think it should pull to the left.
Let me clarify. THey don't think it normally should; based on the way it's set right now (and it tracks and drives perfectly), you'd think it would track to the left, because (I think it was the toe) was significantly more on the L than the R. I think it was like 9.9 on the L and 9.1 on the R. I have the alignment sheet at home; I'll see if I can scan it when I get home.
Originally Posted by AlexZTuned
I run 32 psi rear/34 psi front with 305’s in the rear and it feels great. I ran that pressure on the stock tires as well and it hooked up nicely.
great post. The 305/30/20 question has been abounding for a while; & now put to bed. I’ve literally just asked in a new thread if it was possible on the 18 MY Coupe. Many thanks for the confirmation.
Bump. So we have a consensus that you can definitely run 295/30/20 or 305/30/20 in the rears on a coupe. And mayzo's running 265/35/19, and it sounds like no rubbing or other issues. Anyone running 275/35/19 in the front on a Coupe? Any issues/feedback?
On stock height none of those will be a problem. I'm really low, and the 255/35/19 and 295/30/20 PS4s are going on this week, we'll see how much room is left and I'll raise accordingly. Will report back with findings.
Would it be better to run 295s in the rear and keep the front stock to keep the car nimble?
Yes. This is why I went 255/35/19 in front, that's plenty of tire for the front IMO. The rear went with 295s b/c wider is better for putting power down, so you can do 305s if you need it/ are tuned etc.
The stock 20" rear wheels are 10.5" wide, same as the stock 19" rear wheels, right? Is there any reason why 305s would NOT work on the stock 19" wheels?
'17 AMG S63 Convertible, '17 AMG C63S Edition 1 Coupe
Originally Posted by AlexZTuned
I run 32 psi rear/34 psi front with 305’s in the rear and it feels great. I ran that pressure on the stock tires as well and it hooked up nicely.
You the man! I finally got around to adjusting the tire pressures; brought them down to 34 front and 32 rear yesterday. Drove to work today, and it’s like a totally different car. Very light and nimble! In fact, I think she feels even better than with stock tire sizes - and now I don’t spin the tires accidentally at stoplights! The tire pressures definitely did the trick. And I’m super happy. Thanks!
You the man! I finally got around to adjusting the tire pressures; brought them down to 34 front and 32 rear yesterday. Drove to work today, and it’s like a totally different car. Very light and nimble! In fact, I think she feels even better than with stock tire sizes - and now I don’t spin the tires accidentally at stoplights! The tire pressures definitely did the trick. And I’m super happy. Thanks!
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