[MatthewAMEL]

When you get one of those perfect run with no traffic, dry course...

https://youtu.be/fyjop4jMS5A

2:28.69 at Sebring. Stock tires, DTC-30 pads.

[Mr Bill]

Man oh Man 140 in 4th gear why do we need 5th and 6th , lol ,, great driving , my butt would be so tight it would leave a mark in the seat

[seanblurr]

Some video from Laguna Seca, car was back to showroom for this event and I have to say I had a blast. The car felt way better this weekend on stock wheels/tires than it did last weekend on 305 square NT01's. With that said, my 19 wheels are slightly bent, the track last weekend was pretty green, and I also approached my driving style slightly differently this weekend.

The car pushes a bit with the G3's, but I felt that it was predictable and it was easy to balance. Whereas last weekend the car felt all over the place. It would push some corners and be loose others, it wasn't the most fun car to drive on the Nittos. If I had to guess I would say some of that comes down to driving style, but I really think it has something to do with the ballooned front tire, while it's not extreme, a 305 really needs to be on an 11" wheel to prevent any vague-ness and maintain that precision the stock set up has. I'm going to play with wheels and tires some more, first up may be to try an 11" front wheel.

This was the 5th track day on the car and the stock pads finally reached the end of their life. Laguna is in my mind the hardest track on brakes in California and the stock pads survived 2 track days there. They DID fade, and as the day went on I needed to mellow out in the braking zones, but it was a predictable fade and I was able to easily finish both days. As Ive said before, still blown away by this car in showroom form.

Randy's 137.8 is FLYING. I can pick up some time in turns 4, 6, corkscrew and 9, but damn, I don't know about 1.6 seconds!

[atc5]

Originally Posted by seanblurr

Some video from Laguna Seca, car was back to showroom for this event and I have to say I had a blast.

Good to meet you yesterday, Sean (alan in the integra).

Glad to see you didn't have too much footage of me just pointing you by all the time.

Really helpful to have this video for me to study your inputs as i make my way into a zl1 1le.

Look forward to seeing you at the next event!

[TrackClub]

Sean, I think you had a 38 in a bag if not for the traffic - awesome! Remind me pls which wheels/sizes did ya bend? I too prefer stiffer sidewall in the F for a crisp turn in. Have u tried 295s square on the stockers? As you know, Provoste likes them tons (RE71Rs). Great driving - thx for posting the vid!

[TrackClub]

Matthew - great pace! Thx for posting the vid. Anyone should see the vids here before even contemplating spending any $ except for consumables!

[glamcem]

Originally Posted by seanblurr

Some video from Laguna Seca, car was back to showroom for this event and I have to say I had a blast. The car felt way better this weekend on stock wheels/tires than it did last weekend on 305 square NT01's. With that said, my 19 wheels are slightly bent, the track last weekend was pretty green, and I also approached my driving style slightly differently this weekend.

The car pushes a bit with the G3's, but I felt that it was predictable and it was easy to balance. Whereas last weekend the car felt all over the place. It would push some corners and be loose others, it wasn't the most fun car to drive on the Nittos. If I had to guess I would say some of that comes down to driving style, but I really think it has something to do with the ballooned front tire, while it's not extreme, a 305 really needs to be on an 11" wheel to prevent any vague-ness and maintain that precision the stock set up has. I'm going to play with wheels and tires some more, first up may be to try an 11" front wheel.

This was the 5th track day on the car and the stock pads finally reached the end of their life. Laguna is in my mind the hardest track on brakes in California and the stock pads survived 2 track days there. They DID fade, and as the day went on I needed to mellow out in the braking zones, but it was a predictable fade and I was able to easily finish both days. As Ive said before, still blown away by this car in showroom form.

Randy's 137.8 is FLYING. I can pick up some time in turns 4, 6, corkscrew and 9, but damn, I don't know about 1.6 seconds!

Great video and driving!

It's interesting that you had some weird experience with 305s on 19x10.5" wheels. I didn't experience that ballooning effect and car didn't feel that bad compared to OEM setup but I have 325s in the rear with the huge wickerbill so maybe you had too much front grip and if affected the overall balance of the car because of that not sure. What exactly happens? A bit too much oversteer car felt a bit loose?

For the reference, my friend runs 315s on 18x10.5" wheels with no ill effects and it's still within the manufacturer's recommended range. I found the 305 Trofeo Rs on 10.5" wheels a bit mushy though, possibly because of the softer sidewall design and the softness felt a bit weird on the OEM MRC calibration I believe. OEM is great balance for sure as the suspension is optimized for that but in my experience it was still about 1 second slower at the ORP and more than 2 seconds at the Ridge.

What happened to the wheels? Ran off track? I bent one wheel myself when I ran over a concrete bump

[TrackClub]

If the car pushes in some corners and is lose in others that no fun for sure, as predictability of handling is king IMO. My Vette's handling changed completely (for the better) when I swapped F from 275/40/17 to 275/35/18 due to a much shorter sidewall (same tire) plus .5 wider wheel.
305 vs 315 sidewall is virtually the same BTW.
There might be just enough difference between a 285 and 305 sidewall size to cause issues even on
.5 wider wheel. Just speculating here tho.

[Buzzberd6]

Originally Posted by MatthewAMEL

When you get one of those perfect run with no traffic, dry course...

https://youtu.be/fyjop4jMS5A

2:28.69 at Sebring. Stock tires, DTC-30 pads.

Nice lap Matthew, well done. I noticed that you breathed it a bit going through T-14 (Bishop Bend), I've never had to do that there!

Of course I'm generally on slicks and only weigh about 1900 lbs so there is that.

[Provoste]

Originally Posted by seanblurr

Some video from Laguna Seca, car was back to showroom for this event and I have to say I had a blast. The car felt way better this weekend on stock wheels/tires than it did last weekend on 305 square NT01's. With that said, my 19 wheels are slightly bent, the track last weekend was pretty green, and I also approached my driving style slightly differently this weekend.

The car pushes a bit with the G3's, but I felt that it was predictable and it was easy to balance. Whereas last weekend the car felt all over the place. It would push some corners and be loose others, it wasn't the most fun car to drive on the Nittos. If I had to guess I would say some of that comes down to driving style, but I really think it has something to do with the ballooned front tire, while it's not extreme, a 305 really needs to be on an 11" wheel to prevent any vague-ness and maintain that precision the stock set up has. I'm going to play with wheels and tires some more, first up may be to try an 11" front wheel.

This was the 5th track day on the car and the stock pads finally reached the end of their life. Laguna is in my mind the hardest track on brakes in California and the stock pads survived 2 track days there. They DID fade, and as the day went on I needed to mellow out in the braking zones, but it was a predictable fade and I was able to easily finish both days. As Ive said before, still blown away by this car in showroom form.

Randy's 137.8 is FLYING. I can pick up some time in turns 4, 6, corkscrew and 9, but damn, I don't know about 1.6 seconds!

Sean-

Great video. I watched Randy right after watching your Vid, and the only corner where I noticed a substantial differnce in line/min speed was T9. He seemed to carry 7-10mph more on entry and also used all the exit curbing. Also, I know PTM is in race, but you can see the car working traction control/cutting timing out of most of the corners- especially on initial throttle application. You might experiment with rolling into throttle more a tad more gently to see if it nets you better grunt/traction on exit when in race mode (or see how you like it w/ PTM/TC/SC off). Great driving though, 1.6 seconds ain't much... I've seen conditions create bigger spreads!

[Th3Beast]

Originally Posted by MatthewAMEL

When you get one of those perfect run with no traffic, dry course...

https://youtu.be/fyjop4jMS5A

2:28.69 at Sebring. Stock tires, DTC-30 pads.

Matthew I was there yesterday for a track day with Performance Driving Group. I was the ONLY Camaro out there lol. I held my own in intermediate out there even though it was my first time at Sebring. That lap you posted was your instructor driving, correct?

Here's my best lap of the day at Sebring (2:33.59) still so much more improvement to be made... stock tires, stock brake pads, Motul 660 fluid. Oh and that is a Viper ACR Voodoo II I'm chasing which is number 26 of 31

https://youtu.be/5p_IIfmxjfc

[glamcem]

Originally Posted by Provoste

Sean-

Great video. I watched Randy right after watching your Vid, and the only corner where I noticed a substantial differnce in line/min speed was T9. He seemed to carry 7-10mph more on entry and also used all the exit curbing. Also, I know PTM is in race, but you can see the car working traction control/cutting timing out of most of the corners- especially on initial throttle application. You might experiment with rolling into throttle more a tad more gently to see if it nets you better grunt/traction on exit when in race mode (or see how you like it w/ PTM/TC/SC off). Great driving though, 1.6 seconds ain't much... I've seen conditions create bigger spreads!

That's exactly what I noticed with the Race mode when I first tried it and so I decided to turn off all the nannies. I think GM team changed the throttle mapping after Randy's comments. He mentioned that he found the throttle action a bit severe and not as progressive as he prefers.

Randy was able to do 1:26 with at the Big Willow with the ZL1 but on the last test (against the GT350R) he couldn't get it under 1:27.9 so conditions definitely make a big difference for sure. My morning and after lap times differ by almost 2 seconds which btw is not a case with real R comps (R1, R7 , Z214s..etc or slicks) since they're more heat resistant .

[seanblurr]

Originally Posted by glamcem

Great video and driving!

It's interesting that you had some weird experience with 305s on 19x10.5" wheels...

It's not major, and it is within specs but you can very obviously see the tire bulging out and that's not ideal, especially for track use. If you compare it to the stock front wheel (285/10) you can see that it is stretched just slightly, this is perfect and in my mind is what contributes to the precise turn in the car seems to have. 305/10.5 isn't bad by any means, I just think a 305/11 would help that sidewall out just a bit and in theory bring back some of that precision. I could, in fact, be completely full of shit though For reference, I ran faster this past weekend with stock wheels/tires than I did the weekend before with 305 Nitto's. I did finally stop driving this car like a Miata, and the track was much better so I think those were the main factors. Ill be interested to see how the next event goes next weekend, I plan to swap back and forth to get a better understanding. Nitto's obviously have more grip, and will be faster once I figure out the best set up. That may be trying 305/325 to keep the stagger, or it might mean finding some 11's for the front. We'll see. I'm becoming more intrigued by the idea of using z28 wheels or looking at the zl11le wheels when they come out. MRR can't make me a 19x11 +11 it appears.

Originally Posted by Provoste

Sean-

Great video. I watched Randy right after watching your Vid, and the only corner where I noticed a substantial differnce in line/min speed was T9. He seemed to carry 7-10mph more on entry and also used all the exit curbing. Also, I know PTM is in race, but you can see the car working traction control/cutting timing out of most of the corners- especially on initial throttle application. You might experiment with rolling into throttle more a tad more gently to see if it nets you better grunt/traction on exit when in race mode (or see how you like it w/ PTM/TC/SC off). Great driving though, 1.6 seconds ain't much... I've seen conditions create bigger spreads!

I didn't compare, but I know I am slower through turn 9. It's a tricky corner and you can really carry speed through there but you have to be on power. Good to know there is that much of a difference, I got some work to do. I used to slap that throttle even harder since that's basically how you drive a Miata fast, but I significantly changed that this event. It seems that, per the t/c icon I can roll onto the throttle even more gradual. I only noticed the timing cut a very limited amount during that weekend, perhaps it is still working in there without the obvious cut of power? The video certainly shows more application of t/c then I remember feeling.

[MatthewAMEL]

Originally Posted by Th3Beast

Matthew I was there yesterday for a track day with Performance Driving Group. I was the ONLY Camaro out there lol. I held my own in intermediate out there even though it was my first time at Sebring. That lap you posted was your instructor driving, correct?

Here's my best lap of the day at Sebring (2:33.59) still so much more improvement to be made... stock tires, stock brake pads, Motul 660 fluid. Oh and that is a Viper ACR Voodoo II I'm chasing which is number 26 of 31

https://youtu.be/5p_IIfmxjfc

Yes, Darren Seltzer was driving that session. It's astonishing what the completely stock 1LE can do in a talented drivers hands.

That Viper was there Saturday, also. That's one mean looking car!

See you out there sometime!