Here to CERV
As an avid reader of your magazine and a Corvette enthusiast since the 1960s, I am writing in reference to several recent articles about the CERV I and II prototype Stingrays.
Included is an actual photo from the 1961 Daytona Speed Weeks, held at the Daytona 500, depicting Zora Arkus-Duntov driving CERV I on an exhibition run. I personally took this picture while attending the event. While I can't remember the exact lap speed, it was considerably faster than the stock cars at the time.
I have owned many Corvettes, including a '63 split-window, and I currently have a '69 as well as an '02 Z06. I appreciate the opportunity to share this photo with people who know and appreciate the evolution of the Corvette over time.
Larry R. King
I understand it may be difficult to diagnose a problem via e-mail, but I thought I'd try. My 44,000-mile '95 six-speed coupe has an odd wiggle in the rearend. It does it at almost any speed, but it's most noticeable at highway speeds. If you lift off the throttle, the rear shifts to the left. When you get back into the throttle (even lightly) it shifts to the right. It's only a subtle wiggle, but it is definitely there.
I have owned the car for 10 years, and I can't remember if it always did that. I don't know any other C4 owners to ask, so I'm trying to tap VETTE's resources and C4 knowledge.
PS—I really enjoyed the C4 history lesson in the Dec. '13 issue.
We forwarded your e-mail to Greg Lovell at AntiVenom, who had this to say:
"Start by examining the suspension bushings and tie-rod ends. Something that should be stationary is now moving, causing a rear-steer condition. If all of that checks out OK, move on to the U-joints. Finally, take a look inside the differential for broken parts."
I have several Corvettes and love the articles about all years, body styles, and engines, from stock to insane. I still have a Corvette that was on the cover of Hot Rod in September 1977.
In two separate issues (March '12 and Oct. '13) you have articles on C6 Corvettes that are modified and have non-stock tires and wheels. The March '12 article references an '08 Z06 with Nitto Invo tires sized 275/30ZR19 front and 345/25ZR20 rear. The Oct. '13 article references an '07 twin-turbo Z06 (nice car) with Toyo Proxes T1Rs sized 285/25ZR20 front and 345/25ZR20 rear.
I have an '11 Z06 with the Z07 option, which includes the (19-/20-inch) ZR1 wheels. Earlier this year, I looked for Nittos that would fit and was told by both Discount Tire and Tire Rack that the company didn't make a tire for the car. I asked about Toyo and was told the same thing.
I ended up buying Michelin Sport Cups, which are good tires, but "run flats" (which I did not want) and expensive. So my question is, Where did these guys get their tires? I would love to have a soft-compound tire for this car.
Thank you for the great articles, your attention to detail, and your technical expertise.
The confusion would seem to stem from the fact that you're comparing your Z07's factory wheel sizes with the nonstandard sizes employed on both of the feature cars in question. Put simply, if you really want to run Invos or Proxes T1Rs on the car, you'll first have to install aftermarket wheels in the sizes noted in the articles. (Note that Nitto does offer the Invo in a factory-compatible 285/30ZR19 front.)
We're not sure why you'd want to, however, considering that neither of these tires falls under the rubric of "soft compound." (The Nitto carries a treadwear rating of 200 to 260, depending on size; the Toyo is rated at 280.) Your Pilot Sport Cup ZPs, on the other hand, are among the stickiest street tires on the market (treadwear: 80), and they were specifically developed by Michelin and the Corvette engineering team for use on your Z. Unless you're truly unhappy with the looks of your factory wheels and looking to replace them, think twice before swapping out those Pilot Sports for something less grippy.
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