Poor-sha

Both cars were running Pirelli DH scrubs. The Z06 had the DSC Sport controller and AP Racing brakes.

Like I said before I will do a breakdown of the data in a separate video but folks really need to get realistic about expectations at a track like Summit Point. A 1:14 anything is incredibly rare air and as I said before the data shows a mid 1:14 is very attainable. The remaining time is also going come from taking very big risks. For instance, I'm already pulling 1.38G at 105 MPH down the shoot where there is no runoff, a concerete wall, and a very sharp corner at the bottom. T3 and T10 are also obvious places to pick up time but they are also ~90 MPH corners.

VIR should show a much bigger delta because it has three long straights where the ZR1 can really stretch its legs. If and only *if* I can get clear track and my mental act together I would expect at least a 3s improvement.

ZR1 had the ZTK package. Z06 had the stage 3 aero.

traind

Great driving. Can you share impressions about any differences in feel?

Poor-sha

Here you go.
https://www.corvetteforum.com/forums...ay-report.html

jvp

Sean ain't kidding. While the SCCA isn't the end-all and be-all, a quick look at this page shows Sean's times are past "very fast street cars" and well into the "holy **** it's a real race car". See, for instance, the GT2 Nissan 300ZX at 1:12 and change, or S2 Lola S2000 at 1:14 and change.

As Sean says, he's at the point where going faster is going to put himself and his car at much higher risk than he already is.

911Hunter

Amazing! I was expecting a bigger difference in lap times.

desmophile

[QUOTE=Poor-sha;1597440723]Both cars were running Pirelli DH scrubs. The Z06 had the DSC Sport controller and AP Racing brakes.

Like I said before I will do a breakdown of the data in a separate video but folks really need to get realistic about expectations at a track like Summit Point. A 1:14 anything is incredibly rare air and as I said before the data shows a mid 1:14 is very attainable. The remaining time is also going come from taking very big risks. For instance, I'm already pulling 1.38G at 105 MPH down the shoot where there is no runoff, a concerete wall, and a very sharp corner at the bottom. T3 and T10 are also obvious places to pick up time but they are also ~90 MPH corners.

VIR should show a much bigger delta because it has three long straights where the ZR1 can really stretch its legs. If and only *if* I can get clear track and my mental act together I would expect at least a 3s improvement.



When you are getting comfortable driving 9-10 tenths, most of us mortal's brains take a little while to embrace the next level of mechanical performance.

Having just begun to runs Pirelli slicks on the Z06 it will take a few days at the track for my brain to accept what they can do/might do relative to the Cup2s. I will accept that my fear of self preservation needs to be slowly diffused with experience.

Thanks, Poor-sha, for the guidance you give to those who aspire to what you are able to do.

Seldoon

Very nice video!! Well done. BUT to me it didn't look like a lot of difference between the ZR1 and the Z06. I tried to imagine the ZR1 really blasting away from the Z06 but it didn't happen for me.


Oh well, I ordered my ZR1 with the automatic anyway.

OnPoint

You guys are missing the point of the shorter track. The ZR doesn't have the space - straights - to maximize it's advantage over the Z on a shorter track like this one. As Sean mentioned, on longer tracks, the delta is going to be larger.

Questar

I completely agree with Poor-sha’s Comment about the psychological hurtles the ZR1 can present. My first time tracking the ZR1 was a constant mental battle. The car is markedly faster than the Z06 was... so straightaway speeds were faster... so braking points and pressures were different... entry speeds “felt” quicker so I discovered I was braking early, over braking on entry. Apex speeds were similar to Z06 but power applied faster and smoother. But the entire day I found my mind fighting the concern of overdriving and crashing the car... so I was overly cautious.

When I did my analysis of my sessions I discovered I had run the ZR1 within less than a second of my personal best Z06 time from last season... BUT I did so entirely based on the increased acceleration and straight line speeds... on almost every one of the 10 Track corners I had actually given up time from last year’s Z06 laps. That’s just me and overcoming the mental discomfort. As I get more used to the car and it’s feel, those corners will improve... I honestly believe I can improve over my Z06 times by 3 or 4 seconds. I just have to get mentally comfortable with the higher entry and cornering speeds.

It helps that last week I had an opportunity to ride in a Z06 while Ron Fellows took me for several “hot laps” around Mosport. I have a whole new perspective on just how much speed the car/tires will hold in those corners. Sub 1:30’s here I come.

jvp

That's somewhat true. Summit is 2 miles and 10 turns. Utilizing the pure grunt of the car is going to require coming out of Turns 2, 9, and 10 faster. In all 3 of those cases, it's a matter of skill and testicular fortitude, less so the car. I have no doubts that once Sean gets the suspension configured the way he wants, he'll start nudging that time down a bit. I wouldn't expect to see massive differences between his modified Z06 and his (soon to be) modified ZR1. At this point, he's really pushing what can be done with a street car on the Main track.

OnPoint

I understand. It's the combo of shorter track, and new-to-him car he's just now starting to get used to. Another factor is Sean is a damned good driver, and has already pushed his prior Z faster than what most could in a Z or ZR.

I was just trying to give some perspective to those who seem eager to jump on a message there isn't much diff b/n the Z and ZR on track. I think we'll find there is a significant diff, and I suspect Sean will be providing a good deal of the evidence for such as time goes by.

jvp

Yep; I wasn't trying to debate your point, just adding some more deets to it is all. Been on Summit since '97; it's officially my second home. ;-)

dbaker

Driver "comfort" with the car & "feel" only comes with seat time & pushing the limits.

Fear of crashing a street car and race car are very different.

\db2

spearfish25

For anyone who doesn't track regularly, please also realize that a personal best, for most amateur drivers, is not something you can just go and 'do' every lap. In the last 6 events I've driven, I've only approached my personal best laptime in one of them. Things like traffic, tire life, air temp, track 'green-ness' all play a huge role. My best Sebring laptime was two years ago on the weekend following the 12hr race. There was no rain that week and the track was completely rubbered in. Fast forward to today and I'm much more comfortable with the car and a better driver. I can't beat my best time because the track is always greener than it was that one epic fast weekend.

The fact Sean beat his personal best on his first outing, regardless of the margin, speaks volumes to the speed of the ZR1.

carsnpars

Poor-sha

I look forward to your track video.

GrapemanZR1

carsnpars

carsnpars

range96

Poor-sha beat his Z06 personal best on the first day on the track with the ZR1. That's amazing! I'm sure his time will get even better as he finds the limit of the ZR1. He didn't set his personal best with the Z06 the first day either. You will find that it costs a lot for incremental improvement at this level.
The tires on those black wheels make the difference.
He took me out for a few laps and I can assure you it was a lot of fun. I never experienced such an acceleration out of turns in any car, period. I have been in quite a few race cars before. The ones that turn like crazy usually don't have the power, the ones that have the huge power usually don't handle the best. The ZR1 did both.