| [GMCnet] Longer sustained high speeds get very complex. And costly. (Subject title change ) [message #360536] |
Sat, 05 December 2020 09:46  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
Karma:
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Senior Member |
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I own a 69 COPO Yenko Stinger. Built from a Corvair. Is the only 69 Stinger ever built. Ford had GM build the car off of the production line. As it was built strictly for off road use only. And couldn't pass any emission, or safety standards. Then shipped to the Yenko dealership for completion. Ford was developing a small race car. That required a 13-inch race tire. That could run in the 130, to 140 MPH range. Ford didn't have a car on 13-inch tires that could operate at those speeds. At just under 8,000 RPM's in 4th gear. It has an idle of 2,200 RPM's. Its power range starts at 5,500 RPM's. With no NOS, or turbo charging. Just 4 way over bored carbs.173 cubic inches. To build the cylinder heads with today's money. Would cost about $28,000. The 4 carbs. $11,000. I've had it on the Talladega track about 9 years ago. With an average lap speeds of 142.2 MPH. 138.4 with the right window down. To listen to it next to the outside wall.
When I got it. I got an odometer statement from Goodyear showing 2234 miles. All these miles were run on Goodyear's 5-mile oval test track in West Texas. At over 135 MPH. This was also the tire test car for the development of the studded snow tire. It had 1/4-inch steel shields in each fender well for these tests. With it's prominance. It has an estimated value of well north of $500,000. But I still road race it on road race tracks around the country. It's been written up in many books, and magazines. Been on the cover of Hemmings Classic Car Magazine. May 2013. Our 78 Royale 403 is the tow truck for the 24 ft enclosed trailer. That I haul the car in.
Bob Dunahugh
78 403 Royale
4 COPO Yenkos. Anb way too many restored convertibles in the collection.
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