Michelin Pilot Sport 4S Chunking - Normal?
#31
Rennlist Member
I got 12k out of a set of PZeros, and only replaced them at that mileage as I blew a rear tire, and had a set of MPS4s on reserve at the dealer. After about 4k on the MP4Ss, I am not that impressed. A bit quieter, but after two track days (at LRP), the tread seems to have melted and flowed. I will add pics of this tomorrow. The Pzeros held up better, and had better directional stability. Probably get a new set of Pzeros after I am convinced the Michelins are trashed.
#32
Rennlist Member
Here’s an old photo of one of my sets of 4Ss courtesy of LRP.
#33
Advanced
Thread Starter
Yup, both the PS4S and cup2's will start "chunking" or delaminating if they're pushed too hard without enough camber, or if their pressures aren't monitored closely. Tires should start cold at 28-29psi and warm up to 33-34 max. I gradually bleed off air after every seession to get to 33-34 hot pressure. There's a long thread about this on Rennlist already. I got 5 track days out of my last front set (with OE alignment). I've since changed my alignment to the max spec on OE C2S suspension (-1.4 camber front, -2.1 camber rear) and my PS4S look great after 3 track days.
Pics attached: of delaminating from OE alignment and not checking pressures
: max alignment specs
: new PS4S after 3 track days
Pics attached: of delaminating from OE alignment and not checking pressures
: max alignment specs
: new PS4S after 3 track days
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drdantheman1 (07-29-2023)
#34
Rennlist Member
#35
Rennlist Member
Yes, as you know, LRP eats front left tires like it’s going out of style.
Here are the last set of Nankangs for comparison. Absolutely worn out - but not falling apart.
Here are the last set of Nankangs for comparison. Absolutely worn out - but not falling apart.
Last edited by CT_Peter; 07-29-2023 at 11:31 PM.
#36
Rennlist Member
They wore very well. They sound like a good alternative to Michelin/Pirelli .
The following users liked this post:
CT_Peter (07-30-2023)