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1970 Chevy Camaro - High On 9s

Scott Chvosta’s Nitrous’d Rat Motor Camaro

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“It’s all about drag racing. We have a small group of friends with cars and they are always trying to run faster than each other. Most of the cars are within tenths of one another.” That was Scott Chvosta talking about his buddies and their fast cars. There’s nothing like a little peer pressure to motivate you to run a little bit quicker. Scott’s clearly got his act together, because this 3,300-pound Camaro can run low 10s on motor, and when he squeezes it, the times drop down into the high 9s at well over 130 mph. The Camaro has also yanked off a 1.50 60-foot time and will pull down 126-mph blasts when not on the juice. While that’s hardly headline material these days, consider that Scott is running these numbers not with a mega-inch checkbook motor but with a stock iron-block 468, a pair of iron oval port heads, a Holley carburetor, and plenty of tuning. That’s pure Car Craft. If this doesn’t motivate you in some way, check your pulse.

“The current motor has been together since April ’04—that’s a real record for me!” - Scott Chvosta on his Rat motor reliability

Tech Notes

Who: Scott and Cori Chvosta

What: ’70 Chevrolet Camaro

Where: Racine, MN

Engine: B.E.C. in Rochester, MN, machined the stock, four-bolt main block for a set of SRP 10.25:1 pistons, added Speed-Pro Hellfire rings, and screwed all this together with an Eagle 4340 steel crank and H-beam rods. A Lunati solid roller cam with 256/260 degrees of duration at 0.050 with 0.666/0.624-inch lift commands the Ferrea 2.19/1.88-inch valves. ARP head studs keep the 049 iron oval-port heads glued to the block, and Comp Magnum 1.7:1 roller rockers actuate the valves. As Scott says, “The intake runners are opened way up” and matched to the Dart single-plane intake with a Holley HP 950. For ignition, Scott uses an MSD Pro Billet distributor triggering a Digital 6-Plus with a launch limiter, a peak rpm limiter, and a nitrous retard. For the nitrous, Scott combined an Edelbrock RPM plate with NOS Big Shot solenoids that are tuned for a 175 shot. Scott runs the motor on pump gas, substituting 110-octane race gas on the spray. Yahoo!

Exhaust: Hooker 2.0-inch Super Comps lead to a 3.0-inch exhaust with Spin Tech mufflers.

Driveline: To handle the power, Scott rebuilt his Turbo 400 using a 5,000-rpm Coan converter, a Hughes transbrake, and a Turbo Action Cheetah shifter. Amazingly, the stock driveshaft has yet to pretzel while connecting to the factory 12-bolt spinning Yukon 4.10:1 gears, Yukon 33-spline axles, and an Eaton posi.

Suspension/Brakes: Other than a set of Competition Engineering front shocks, the front is stock. Out back, Scott left the stock leaf springs in place, added aluminum bushings, and then bolted in a Competition Engineering Slide-A-Link system. He also replaced the rubber spring cushion with an aluminum spacer. Amazingly, the brakes are also stock discs and drums.

Wheels/Tires: Cragar Pro Stars are on all four corners with 15x6 in front and 15x8 in the rear-mounting skinny M/T Sportsmans in front and M/T 275/60R15 ET Street radials planting the power.

Body: Don Henderson of Stewartville, MN laid the PPG gold metallic single stage paint over the Harwood 4-inch cowl hood and the rest of the Camaro. Otherwise, the body is stock.

Interior: Other than a set of Auto Meter tach and gauges, the interior is nearly factory fresh.

Speed: 60-foot: 1.419; 330-foot: 4.204; eighth-mile: 6.823; eighth-mile mph: 111.25; 1,000-foot: 8.20; quarter-mile: 9.946; quarter-mile mph: 133.41. All runs at Cedar Falls Raceway, Cedar Falls, IA.

“If it wasn’t for the cowl hood and the thumpy exhaust, most people [would] just write it off as another Camaro—until they see it run!” - Scott Chvosta on his “sleeper” Camaro

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