USA1C5

Just curious of what kind of speeds are being obtained on VIR back straight. My first HPDE there with NCM back in July I couldn't make 150 mph. I could get close at 149 mph. This past Monday Nov. 19 at a HPDE by TrackDaze I made 155 mph. I don't know what the difference in speeds is due to unless it's temperature related. It was a bit cooler Nov. 19 but not a big difference, maybe around 15 to 20 degrees. Could the temperature make that big a difference?

John Shiels

temp helps but so does being familar with the track.

CHJ In Virginia

Proper entry and Exit from the preceeding turns is the key to speed on the straights. I think that your familiarity with the track has a lot to do with your increased speed. Cooler ambient air allows more HP which helps too.

freefall

Oak tree will make your speed. The stockish c5z guys are about 150.

USA1C5

Good point, I really didn't think about being more familiar with the track. Maybe next time I can do even better, although what top speed one can obtain on the longest straight is a small percentage of overall performance on a road course.

USA1C5

Yes, I think you are correct CHJ In Virginia. Practice makes better I guess.

I think I remember you from Summit Point, Shenandoah Circuit. How's it going. I just did my last event for the year ar VIR. I don't expect anymore events until about Feb. or early Spring.

Z Fast

We can all always do better. If we truly can't, then we either need a faster car or it's time to move onto another track

jrz1

slightly modified '06Z best per GPS around 163. Headers/intake/tune & suspension.

USA1C5

With those mods my 155 in a totally stock C6Z all the way down to the tires sounds good to me. I was going to shoot for 160 next time but that's probably out of reach for total stock. When I say total stock I mean total stock, no tune, factory air filter, oem tires etc.

John Shiels

you do get to a point where trying to shave time or decrease lap times gets harder and harder as it drops. I guess that is the fun of it.

heavychevy

I'd think the back straight speeds are least important. And if yo uare taking the time to look right before braking . If you concentrate too much on the back straight speed you will end up overshooting the braking zone (Assuming you arent coasting for a while). Fastest back straight speed does not equal fastest lap.

Just my opinion.

USA1C5

You are correct. As I said earlier in this Thread, what top speed one can obtain on the longest straight is a small percentage of overall performance on a road course. It is a good measure of how one gets out of Oak Tree. As far as watching speed, that can be done with a GPS device that records top speed. The only drawback to mine is at the end of track session it only records top speed of entire session so you don't know what lap but you know where you did it at VIR because theres only one straight I could do that.

Timz06

Totally stock z should be over 160- depends on your exit out of oak tree.

Tim

USA1C5

I'm totally stock. Who is correct ???

JDIllon

7000RPM in 4th Gear=161 thats my best on the VIR back straight. Tough to get into 5th on that staight. JD

SouthernSon

Few run stock tire sizes on the track. One would have to calculate very closely the actual adjusted speed of the vehicle to compare one vehicle with another. Running 305's on the rear of my Z (see mods in sig) I realized best of only 145 mph my one trip there. Of course, my TB was acting up and went into "limp home" mode as I rounded Oak Tree my last lap. So, I probably wasn't 100% that day when it was half way working.

John Shiels

depends greatly on driver equation,

varkwso

JD left foot brake for the tree and you will get into 5th no problem in a C6Z there..

94ZR1#444

I could only squeeze out 162 or so and was no where near 5th gear. I had stock pads on and anything faster would definitley be a Code Brown....

varkwso

brakes only slow you down...