Originally Posted by Dellrose (Post 1598604953)

Originally Posted by Bill Dearborn (Post 1598602119)

I believe they are both Sports Cars. I had a 2008 JSB Z06 3LZ which had the ebony and linen leather interior. Fabulous looking car. The white seats, door panels and dash really made it look different than other cars. I tracked the car for 7 seasons and made several long trips in it from UpState NY to South Carolina one time and UpState NY to Key West another time. Excellent road car, excellent track car. Seats were upgraded to the late C6 versions from just heated seats to full sport seats by adding lumbar and bolster supports and passenger side power seat track from a 2010 GS. Car rode great and drove great.

I drove the car 160 miles through a pouring rain to the dealership to trade it in for my 15 3LZ M7 Z06/Z07. Interior was about the same from a leather standpoint but it had the black interior so didn't have that nice contrast the C6Z had. Ride was a little stiffer but the car ran through the pouring with no issues even though ambient temps dropped to the low 40s. I haven't done any long trips in the car, I imagine it won't be an issue for me.

I have tracked this car for 3 seasons and find it is a much better track car than the C6Z which overall I found to be better than the C5Z I ran for 6 seasons. It handles bumps in turns much better than the C6Z did. There are turns where I couldn't put pedal down with the C6Z until the rear wheels came off a series of bumps. With the C7Z I don't have to hold a maintenance throttle until the rear wheels come off the bumps I can just start adding power like I did with my previous C5 Z. Thus the C7 Z comes off those corners harder than the C6 or C5 Z. Faster than the C6Z because I couldn't use the LS7's torque and faster than the C5Z because it didn't have the gonads the C7 Z has.

One of the biggest differences between the two cars is GM finally resolving the voice of the Customer. Seats in the C1, C2, C3 cars were basically seats. Not very comfortable and not very good for holding a person in place during hard cornering. The early C4s had great seats but large butt Customers complained and GM evolved the seats toward the seats we had in the C5 and C6 that contained large butts but didn't provide lateral support. I had to add race seats to both my C5 and C6 to get the full cornering capability out of those cars. I don't need to do that with the C7 Comp Seats, they hold me in the seat very well when going around corners.

Another big difference between the C6 and C7 is the eDiff which enhances the capability of the C7. I had the joy of learning the CMP track by following a 14 Z51 A6 around CMP in my C6Z the first time I went there. That car could come off corners much harder than my C6Z. Some of that was the automatic but most was probably due to PTM and the eDiff and how it distributed power to the rear wheels. I could catch him further down the straight but even when I was on his bumper through the apex of the turn he could just scoot away from that point on until I could go wide open with the LS7. When it gets right down to it a stock C6Z going up against a stock C7 Z51 has its hands full.

Then we get to brakes. The C6Z (other than the 2011 or newer Z07 version that had CCM brakes) had lousy brakes. They just weren't track capable. Every C7 comes with vastly superior brakes compared to the C6Z or any of the C5s.

I also really appreciate the PDR in the C7. It is an amazing piece of electronics and cost less than a comparable aftermarket solution. Sure Harry's Lap Timer, a cell phone and an OBD dongle may provide some of the data seen on the screen but it can't match the other data which isn't on the screen. To do that you need better equipment and by the time you put it altogether you have a couple $K tied up in it.

In the final analysis my C7Z is letting me lap tracks like VIR an average of 5 or 6 seconds faster and when I get a really good lap in I am close to 8 seconds faster than I ran in the C6Z. The other thing the C7Z does is get attention. Although my JSB Ebony/Black C6Z was commented all the time about being the best looking Corvette in the group it didn't get the mouth watering attention my Black on Black C7 Z with full aero gets. I never had fast food restaurant employees drop what they were doing behind the counter to go out and take pictures of the car like happens all the time with the C7. If you want to be anonymous a C6 is a better car for that than a C7.

Bill

Bill, were you running the same tires on your c6z as your c7z?

i may be incorrect on this , but I recall you mentioned in one of my threads that I complain about the c7z’s acceleration on the big end you could achieve higher speeds on the longer straights with the c6z. Perhaps this is due to the aero or a shortcoming in the Lt4 it self (small supercharger)

Other then high end acceleration do you see any other deficit of the c7z. Perhaps something in its design that might have contributed to the on track incident?

Bill, were you running the same tires on your c6z as your c7z?

i may be incorrect on this , but I recall you mentioned in one of my threads that I complain about the c7z’s acceleration on the big end you could achieve higher speeds on the longer straights with the c6z. Perhaps this is due to the aero or a shortcoming in the Lt4 it self (small supercharger)

Other then high end acceleration do you see any other deficit of the c7z. Perhaps something in its design that might have contributed to the on track incident?