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Originally Posted by ZDan
Are you saying grip decreases with wear? Will keep eye on relative performance per event...
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Correct, they're quick at the start of their life and as they wear then tend to give up grip due to how the tire was designed.
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Car and Driver test shows the PS4S quicker in the dry and Conti quicker in the wet.
https://www.caranddriver.com/feature...-test-feature/
I'm kinda guessing that same vs. same the PS4S should be at least half a sec quicker in the dry, but maybe not, CSGMike suggests otherwise...
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To make things more complicated, this was TR's test:
https://www.tirerack.com/tires/tests...y.jsp?ttid=223
No question, ECS in completely standing water will be quicker simply because of void tread vs PS4S. PS4S is quicker (IMO) in basically all rain instances because the chances of a monsoon event are slim to none (where you have visible standing water). I've found for the most point all rain instances are either wet (not standing) or in a transition phase where it's wet going to dry. In these cases, PS4S will be significantly quicker than ECS (which is something none of these tire tests show because it's always just full bore wet). The transition phase from ECS to say RE-71R is basically once dry patches start forming you need to switch ASAP or you're already late. PS4S you can let it almost become fully dry before switching because the tire still performs well under semi-wet conditions (as long as it's kept cool and doesn't overheat). If that makes any sense.
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I decided to run Bilstien B8s in place of stock dampers so I'm taking a point there which bumped my min weight up a bit. So I'd have to run ballast even with 225 PS4S. I think 245 Contis at 2907 lb. should be about equal to 225 PS4S at 2965 lb.
Also was super-disappointed with Michelin PSS I ran for a couple of seasons on the street on my FD.
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You can't compare PSS to PS4S. I can't even relate the two.
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I was thinking the same thing, but other reasons tipped it to the Contis.
Have you run both PS4S and Conti ECS?
Tad bit late now but curious if you have comparitive lap times...
See how it goes at the track! If Sash kills me running more weight with less power on Rival S tires, I might consider those plus significant ballast...
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I ran Conti ECS 245/40 on 17x9 and now same tire on same wheel in PS4s. Both for 2 years of DD/autox rain use. While I don't have track times on the actual track to compare, my thoughts/opinions are related to autox and how the tire performs under those conditions. So, threshold of grip and how the tire recovers is "probably" a bit more important to autox?
PS4S in the wet is simply like cheat mode. I can only compare against others in the class in same conditions when they were running RE-71Rs or similar and it is seconds.
I know the weight penalty is higher with A052s...but worth consideration