[TrackClub]

Originally Posted by glamcem

I might be wrong but it looks like car begs for more front tire and understeers quite a bit. I would try and see how the 305/325 with good camber feel and maybe use more trail braking to rotate the car at those tight corners. I really wanted to come to the Area 27 and VIMC this year and even signed up for an event then they closed the borders

Hey Cem that's an old vid from last yr when GMG had his alignment walk all over the place, so proly not ideal to draw too many conclusions from. Cheers!

[glamcem]

Rotating the front tires helped getting more life out of the SC3R tires and I noticed I corded both inside and outside this time ..it's after about 15 sessions though so I am not complaining.

driver side



and Passenger side


The fact that it corded first on the driver side again (both inner and outer edges), even the Ridge has CCW configuration made me think that my alignment might be off a little bit.

I had my guy install the new set of tires for front wheels but he was busy so I couldn't have him check the alignment. I attended another event yesterday at the Ridge and improved my PB by 1.2 seconds. I feel that on a better day and/or with less traffic I should be able to take it below the 1:50 mark. My friend with a Z06 and R7s was doing 1:47.9 yesterday for the reference .




and the video from the event:

[glamcem]

Originally Posted by TrackClub

Hey Cem that's an old vid from last yr when GMG had his alignment walk all over the place, so proly not ideal to draw too many conclusions from. Cheers!

Oh ok , I didn't know the story apparently I missed that part

[TrackClub]

Originally Posted by glamcem

Oh ok , I didn't know the story apparently I missed that part

Haha NP GMG had major issues because of incorrectly mounted tires and what looks like a blower leak...
Very unlucky for a first day out :(

BTW a nice lap man! Congrats on a new PB! Seems to me you've changed your driving style a bit including feeling the tire with more active steering corrections too.
Great stuff!
What was the ambient and what did your GS friend run?

What seems weird to me that even with rotations the tires still look very different L vs R. Any idea why?

Cheers!

[OhioRiderAaron]

Really nice lap glam, almost to the point of being a little boring (in a good way lol). I saw oozk's video with the Z06 as well, only a few seconds behind him!

[TheRealJA105]

Originally Posted by glamcem

Rotating the front tires helped getting more life out of the SC3R tires and I noticed I corded both inside and outside this time ..it's after about 15 sessions though so I am not complaining.

driver side



and Passenger side


The fact that it corded first on the driver side again (both inner and outer edges), even the Ridge has CCW configuration made me think that my alignment might be off a little bit.

I had my guy install the new set of tires for front wheels but he was busy so I couldn't have him check the alignment. I attended another event yesterday at the Ridge and improved my PB by 1.2 seconds. I feel that on a better day and/or with less traffic I should be able to take it below the 1:50 mark. My friend with a Z06 and R7s was doing 1:47.9 yesterday for the reference .




and the video from the event:

Congrats Cem, but regarding the cording, this still looks like the rubber is just delaminating on the edges from overheating judging by the amount of rubber left on the center of the tire. Nothing against you and this seems very common, but i think this is a very big reason that keeps a lot of us from just blowing crazy money on these G3Rs. If you can swing it more power to you, but I bet with some cool down laps mixed into your sessions you may not have this delamination problem.

I still have my $100 used set of 4-285/35/20 G3Rs to try at some point this year. Not sure whether i should mount them inside out or not as the 5th gen guy did 2 days on them so they have some outside wear. I'll try to remember to get a pic of them.

[TrackClub]

Originally Posted by TheRealJA105

Congrats Cem, but regarding the cording, this still looks like the rubber is just delaminating on the edges from overheating judging by the amount of rubber left on the center of the tire. Nothing against you and this seems very common, but i think this is a very big reason that keeps a lot of us from just blowing crazy money on these G3Rs. If you can swing it more power to you, but I bet with some cool down laps mixed into your sessions you may not have this delamination problem.

I still have my $100 used set of 4-285/35/20 G3Rs to try at some point this year. Not sure whether i should mount them inside out or not as the 5th gen guy did 2 days on them so they have some outside wear. I'll try to remember to get a pic of them.

I'd agree: something wonky is going on here as no other pix of corded G3Rs show delamination. So either the alignment has walked significantly, or the G bar is too stiff and causes too quick a weight transfer overheating the tire? Fyi that's what happened to me when i upgraded the bars on my C5Z a few yrs back. An outside F NT01 was gone completely in a *single* day. Food for thought in any case. Cheers!

[Zl1+911]

this issue is a fairly common issue with G3R on track, i have experienced it myself. I dont think its alignment related. There definitely is an issue with inside- inside (literally the 1/4th inch of the inside) edge wear with the way the ZL1/E runs and the tire wears. I think GY should should do some R&D here and address this issue.

[TrackClub]

Originally Posted by Zl1+911

this issue is a fairly common issue with G3R on track, i have experienced it myself. I dont think its alignment related. There definitely is an issue with inside- inside (literally the 1/4th inch of the inside) edge wear with the way the ZL1/E runs and the tire wears. I think GY should should do some R&D here and address this issue.

You mean cording (common) or delamination (never seen it before). Cheers!

[Zl1+911]

i am not sure of the technical term here, so pardon my ignorance, but the first picture above and the inside wear is what i have observed - it seems to be something very specific impacting the tire inside on its edge and i have also seen that in some other threads prior.

[glamcem]

Originally Posted by TrackClub

Haha NP GMG had major issues because of incorrectly mounted tires and what looks like a blower leak...
Very unlucky for a first day out :(

BTW a nice lap man! Congrats on a new PB! Seems to me you've changed your driving style a bit including feeling the tire with more active steering corrections too.
Great stuff!
What was the ambient and what did your GS friend run?

What seems weird to me that even with rotations the tires still look very different L vs R. Any idea why?

Cheers!

Thank you! Ambient temps are about 5 degrees lower than the last time.
Friend with the GS was faster that day but only slightly I guess, I was able to follow him for 3-4 for laps without losing him from sight. He wasn't timing.

I believe he ran 1:48ish with R7s in the past though.

I called my mechanic and hopefully we can check the alignment soon. Will keep you posted

Originally Posted by OhioRiderAaron

Really nice lap glam, almost to the point of being a little boring (in a good way lol). I saw oozk's video with the Z06 as well, only a few seconds behind him!

Thanks!

[glamcem]

Originally Posted by TheRealJA105

Congrats Cem, but regarding the cording, this still looks like the rubber is just delaminating on the edges from overheating judging by the amount of rubber left on the center of the tire. Nothing against you and this seems very common, but i think this is a very big reason that keeps a lot of us from just blowing crazy money on these G3Rs. If you can swing it more power to you, but I bet with some cool down laps mixed into your sessions you may not have this delamination problem.

I still have my $100 used set of 4-285/35/20 G3Rs to try at some point this year. Not sure whether i should mount them inside out or not as the 5th gen guy did 2 days on them so they have some outside wear. I'll try to remember to get a pic of them.

Thanks ! I think you're right, I listened to your advice at my last event at the ORP and tried a few cool down laps so hopefully it will help a bit . At the Ridge , however, we have no option for a cool down lap as it's very hard to get a good clean lap without any traffic and sessions are technically 16 min long (unless there's no interruption with oil spill, crash etc) .. so we have to be very strategic there :/

[glamcem]

Originally Posted by TrackClub

I'd agree: something wonky is going on here as no other pix of corded G3Rs show delamination. So either the alignment has walked significantly, or the G bar is too stiff and causes too quick a weight transfer overheating the tire? Fyi that's what happened to me when i upgraded the bars on my C5Z a few yrs back. An outside F NT01 was gone completely in a *single* day. Food for thought in any case. Cheers!

Not surprised actually, it sounds counter-intuitive since one could think (like me lol), having more roll resistance (ARBs) and more camber should help with outer edges since body roll is limited and so the stress on the outer edges.

However, by getting rid of body roll it's much easier to reach the limits of the tires since we get faster and faster also means more heat generated on the tires. I think delamination is proof to that. My only concern is in both times it happened on the Front driver side, even though I drove them with different configuration .. I cannot wait to see the alignment numbers hopefully it will solve the mystery

Originally Posted by Zl1+911

i am not sure of the technical term here, so pardon my ignorance, but the first picture above and the inside wear is what i have observed - it seems to be something very specific impacting the tire inside on its edge and i have also seen that in some other threads prior.

Typically softer compound tires always give up faster, that's the tax of using a more aggressive compound/ faster tires. I highly doubt R7s would last any longer than these, RRs on the other hand seem like they will last longer but they're a bit slower (not too much Though). I will try RRs again on a better day and when they go bad, I wanna try Hankook Z214s ..but I keep buying SC3Rs since the extra grip is addicting we'll see about that

[TrackClub]

Originally Posted by glamcem

Not surprised actually, it sounds counter-intuitive since one could think (like me lol), having more roll resistance (ARBs) and more camber should help with outer edges since body roll is limited and so the stress on the outer edges.

However, by getting rid of body roll it's much easier to reach the limits of the tires since we get faster and faster also means more heat generated on the tires. I think delamination is proof to that. My only concern is in both times it happened on the Front driver side, even though I drove them with different configuration .. I cannot wait to see the alignment numbers hopefully it will solve the mystery

Typically softer compound tires always give up faster, that's the tax of using a more aggressive compound/ faster tires. I highly doubt R7s would last any longer than these, RRs on the other hand seem like they will last longer but they're a bit slower (not too much Though). I will try RRs again on a better day and when they go bad, I wanna try Hankook Z214s ..but I keep buying SC3Rs since the extra grip is addicting we'll see about that

Yep agree with your response to me. The balance gets much finer and the tire loads up much faster. Yet i didnt see you overdrive, so...
Hope it is just alignment. Cheers!