Summit Point Track Day Report - Page 2 - CorvetteForum - Chevrolet Corvette Forum Discussion

Notices
C7 ZR1 Discussion General ZR1 Corvette Discussion, Technical Info, Performance Upgrades, Suspension Setup for Street or Track

Summit Point Track Day Report

Old 06-13-2018, 01:29 PM
  #21  
Poor-sha
Track Rat
Support Corvetteforum!
Thread Starter
 
Poor-sha's Avatar
 
Member Since: Oct 2006
Posts: 5,058
Thanked 1,888 Times in 783 Posts
Default

Finally broke my Z06 PB and in to the 1:14's. This was a 1:14.9 but the data shows a theoretical 1:14.6 between the two fast laps that outing. I was overdriving the car a bit that outing so it's not the smoothest driving.

Poor-sha is online now  
The Following 4 Users Say Thank You to Poor-sha For This Useful Post:
johnglenntwo (06-14-2018), PRE-Z06 (06-13-2018), Racingswh (06-13-2018), Telepierre (06-14-2018)
Old 06-13-2018, 02:33 PM
  #22  
Dave Schotz
CF Senior Member
 
Dave Schotz's Avatar
 
Member Since: Oct 2000
Location: Chandler AZ
Posts: 1,581
Thanked 46 Times in 39 Posts
Default

Nice progress! Enjoy the updates, keep em coming!

Best Regards,
Dave
Dave Schotz is offline  
Old 06-13-2018, 03:23 PM
  #23  
RUQWIKR
CF Senior Member
 
Member Since: Mar 2001
Location: Dallas (area) Texas
Posts: 151
Thanked 5 Times in 3 Posts
Default

Someone asked earlier, but, I did not see the answer: were you on 93 or 100 octane? Thanks for sharing the info, video, etc.
RUQWIKR is offline  
Old 06-13-2018, 03:31 PM
  #24  
Poor-sha
Track Rat
Support Corvetteforum!
Thread Starter
 
Poor-sha's Avatar
 
Member Since: Oct 2006
Posts: 5,058
Thanked 1,888 Times in 783 Posts
Default

Originally Posted by RUQWIKR View Post
Someone asked earlier, but, I did not see the answer: were you on 93 or 100 octane? Thanks for sharing the info, video, etc.
93 octane.
Poor-sha is online now  
Old 06-13-2018, 03:34 PM
  #25  
RUQWIKR
CF Senior Member
 
Member Since: Mar 2001
Location: Dallas (area) Texas
Posts: 151
Thanked 5 Times in 3 Posts
Default

Originally Posted by Poor-sha View Post
93 octane.
Would be interesting to see what the difference with 100 octane makes, if any. I see the Owner's Manual says 100 octane is recommended.

LT5 Engine : 93 octane (or higher)
unleaded gasoline is required.
100 octane (or higher) unleaded
gasoline is recommended to
maximize powertrain performance
and improve longevity of
components within the powertrain
RUQWIKR is offline  
Old 06-13-2018, 03:43 PM
  #26  
jvp
Tech Contributor
Support Corvetteforum!
 
jvp's Avatar
 
Member Since: Mar 1999
Location: Oak Hill VA
Posts: 8,579
Thanked 1,470 Times in 412 Posts
"Ask Tadge" Facilitator
Default

Originally Posted by RUQWIKR View Post
Would be interesting to see what the difference with 100 octane makes, if any. I see the Owner's Manual says 100 octane is recommended.
It wasn't really hot enough to matter; the 100 octane isn't going to suddenly give you more "go juice". It's just going to delay the onset of timing being pulled. But it's cool enough now (low 80s*) that it wouldn't matter enough.

And 100 octane at the pumps at Summit was about $8-9/gallon, last I remember. Ouch!
jvp is offline  
Old 06-13-2018, 03:47 PM
  #27  
Poor-sha
Track Rat
Support Corvetteforum!
Thread Starter
 
Poor-sha's Avatar
 
Member Since: Oct 2006
Posts: 5,058
Thanked 1,888 Times in 783 Posts
Default

Originally Posted by jvp View Post
It wasn't really hot enough to matter; the 100 octane isn't going to suddenly give you more "go juice". It's just going to delay the onset of timing being pulled. But it's cool enough now (low 80s*) that it wouldn't matter enough.

And 100 octane at the pumps at Summit was about $8-9/gallon, last I remember. Ouch!
Yeah, it basically doubles your fuel costs and I just went through 16.7 gallons in 30 minutes on track (more on that to come).
Poor-sha is online now  
Old 06-13-2018, 04:22 PM
  #28  
badhabit_wb
CF Senior Member
 
Member Since: Sep 2014
Location: in the country North Carolina
Posts: 1,913
Thanked 176 Times in 157 Posts
Default

Sean if you want to check out the seats in my car at VIR you're welcome to. I have a harness bar and six point harness so that should help you decide if it's worth it.

Herman
badhabit_wb is online now  
Old 06-13-2018, 04:28 PM
  #29  
Mad Dog 24
CF Senior Member
 
Mad Dog 24's Avatar
 
Member Since: Feb 2015
Location: Central Square New York
Posts: 1,617
Thanked 300 Times in 214 Posts
Default

Sean what kind of temps is the car at after some back to back hard runs?
Mad Dog 24 is offline  
Old 06-13-2018, 05:37 PM
  #30  
Poor-sha
Track Rat
Support Corvetteforum!
Thread Starter
 
Poor-sha's Avatar
 
Member Since: Oct 2006
Posts: 5,058
Thanked 1,888 Times in 783 Posts
Default

I decided to go for an endurance run to see how long it take for a tank of gas. I ended up coming in at 30 minutes and the fuel gauge was still showing about half a tank. However, as I came down pit lane and by the time I made it to the fuel pumps it was sitting on empty. Don't trust the fuel gauge on long track stints.

My Z06 was pretty consistent at 11 gallons in 30 minutes. The ZR1 consumed 16.7 gallons in the same period of time. This was running largely 1:16-1:17 laps which are a couple seconds off my best but were something I could maintain.

Poor-sha is online now  
Old 06-13-2018, 05:44 PM
  #31  
badhabit_wb
CF Senior Member
 
Member Since: Sep 2014
Location: in the country North Carolina
Posts: 1,913
Thanked 176 Times in 157 Posts
Default

We're going to need a bigger tank! Or is that boat? I doubt you'll get 30 minutes at VIR.

Last edited by badhabit_wb; 06-13-2018 at 05:47 PM.
badhabit_wb is online now  
Old 06-13-2018, 07:38 PM
  #32  
sammyv
CF Senior Member
 
sammyv's Avatar
 
Member Since: Nov 2009
Location: Zionsville In
Posts: 1,154
Thanks: 0
Thanked 110 Times in 102 Posts
Default

Thanks for the post! Great driving!
sammyv is offline  
The Following User Says Thank You to sammyv For This Useful Post:
Poor-sha (06-13-2018)
Old 06-13-2018, 07:44 PM
  #33  
Bob U
CF Senior Member
 
Bob U's Avatar
 
Member Since: Oct 2012
Location: Ft. Lauderdale, FL
Posts: 828
Thanked 115 Times in 98 Posts
Default

Originally Posted by Poor-sha View Post
Quick update on this before everyone gets too excited. Yesterday I did two sessions in PTM modes with the DSC controller and had no issues. This morning I can't get the PTM modes to come up. I've put the stock controller back in for today while we figure this out.
Can you tell us how the DCS compares to the stock one, did it effect your lap times?
Thanks
Bob U is offline  
Old 06-13-2018, 08:51 PM
  #34  
Vernon
CF Senior Member
 
Vernon's Avatar
 
Member Since: Jun 2000
Location: Pickering Ontario
Posts: 933
Thanked 117 Times in 111 Posts
Default

Thank you for the updates. Nicely done with that great beast!
Vernon is offline  
The Following User Says Thank You to Vernon For This Useful Post:
Poor-sha (06-13-2018)
Old 06-13-2018, 09:54 PM
  #35  
Poor-sha
Track Rat
Support Corvetteforum!
Thread Starter
 
Poor-sha's Avatar
 
Member Since: Oct 2006
Posts: 5,058
Thanked 1,888 Times in 783 Posts
Default

Originally Posted by Bob U View Post
Can you tell us how the DCS compares to the stock one, did it effect your lap times?
Thanks
The main thing I noticed with the DSC controller was that the car was more stable under braking and in fast transitions. It does seem like the ZR1 is going to need some tweaks to the tune to adjust for the rear wing. Mike and I were all set to start working on those changes when I discovered that PTM modes wouldn't come up so I went back to the stock controller. All the testing today was with the stock controller.

Originally Posted by Mad Dog 24 View Post
Sean what kind of temps is the car at after some back to back hard runs?
Coolant temps would stabilize at 219F. Oil temps stabilized at 273F.
On the full fuel load run the trans fluid temp reached 307F but that was the only time I saw it that high. Usually it ran in the 270-280 range.




I'm pretty beat so a quick update on a couple of other things before I forget.

First, the no lift shift works much better in the ZR1. There's none of that jerky throttle cut out like there was in the Z06. It's just smooth.
Second, the understeer I complained about yesterday was largely gone today. I'm not sure exactly why but the track conditions were different.

Last edited by Poor-sha; 06-13-2018 at 10:03 PM.
Poor-sha is online now  
The Following User Says Thank You to Poor-sha For This Useful Post:
Mad Dog 24 (06-15-2018)
Old 06-13-2018, 10:15 PM
  #36  
Questar
CF Senior Member
 
Questar's Avatar
 
Member Since: Feb 2014
Location: Ontario Canada
Posts: 483
Thanked 134 Times in 86 Posts
Default

Sean... I didn’t lower my front suspension (as you did) but ran last week with maximum rear wing AoA. I did not get the sense that mine was understeering but I’m not as perceptive as I suspect you are. So I’m wondering whether to adjust the wing to one setting less or to leave it as is. With my front suspension a bit higher than yours my rear wing is a bit less angled, if I adjust it do you think I’ll be taking too much downforce off the back end and get an oversteer condition? I’d rather have understeer than oversteer.
Questar is offline  
Old 06-13-2018, 10:19 PM
  #37  
Racingswh
CF Senior Member
 
Racingswh's Avatar
 
Member Since: May 2009
Location: Willow Grove PA
Posts: 1,660
Thanked 201 Times in 151 Posts
Default

Great driving Sean!! Thanks for all the updates. I know so many of us really appreciate you taking the time to do this. Car runs as great as it looks!!
Racingswh is offline  
Old 06-13-2018, 10:20 PM
  #38  
Poor-sha
Track Rat
Support Corvetteforum!
Thread Starter
 
Poor-sha's Avatar
 
Member Since: Oct 2006
Posts: 5,058
Thanked 1,888 Times in 783 Posts
Default

Originally Posted by Questar View Post
Sean... I didnít lower my front suspension (as you did) but ran last week with maximum rear wing AoA. I did not get the sense that mine was understeering but Iím not as perceptive as I suspect you are. So Iím wondering whether to adjust the wing to one setting less or to leave it as is. With my front suspension a bit higher than yours my rear wing is a bit less angled, if I adjust it do you think Iíll be taking too much downforce off the back end and get an oversteer condition? Iíd rather have understeer than oversteer.
In theory lowering the front end should make the front aero work better so I would have expected your understeer to be worse than mine. I'd be inclined to try it both ways and see what you think. Luckily it's a 2 min job to change the wing angle.
Poor-sha is online now  
Old 06-13-2018, 10:32 PM
  #39  
Bob U
CF Senior Member
 
Bob U's Avatar
 
Member Since: Oct 2012
Location: Ft. Lauderdale, FL
Posts: 828
Thanked 115 Times in 98 Posts
Default

After looking at your temperature data strip, the Intake Air Temp is only running a few degrees warmer then the Outside Air Temp.
Is the Intake Air Temp coming from the MAF sensor?
How does this spread compare to the Z06?
Thanks for the data.
Bob U is offline  
Old 06-13-2018, 11:13 PM
  #40  
OnPoint
CF Senior Member
Support Corvetteforum!
 
OnPoint's Avatar
 
Member Since: Jun 2006
Location: Wichita Kansas - 2015 Z06 & 2010 ZR1
Posts: 17,925
Thanked 1,688 Times in 1,002 Posts
Default

Nicely done, Sean. Always good to have your data and knowledge shared with the forum.
OnPoint is offline  
The Following User Says Thank You to OnPoint For This Useful Post:
Questar (06-13-2018)

Thread Tools
Search this Thread
Quick Reply: Summit Point Track Day Report


Sponsored Ads
Vendor Directory

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

© 2018 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: