Q&A

You’ve got questions. We’ve got answers. We work with the Summit Racing tech department to tackle your automotive-related conundrums. This week, we’re talking about aluminum vs. steel roller rockers and rocker ratio in daily-driven, high-mileage fleet vehicles. Q: I have some questions concerning the use of aluminum roller rockers on a street engine with a stock-type

I see where Summit Racing lists a TCI transmission that was originally a 4L80E – but they list it as a six-speed transmission. I’ve heard a little about this—did they add two more gears to the transmission? How is this different from the GM 6L80E transmission that is used in the Corvette or in the

You’ve got questions. We’ve got answers. We work with the Summit Racing tech department to tackle your automotive-related conundrums. This week, we’re recommending a camshaft, torque converter, and rear-axle gear ratio for a race-only ’86 Ford Mustang. Q: I have a 1986 Mustang project car with a 351 Cleveland engine. The four-bolt main block has been

You’ve got questions. We’ve got answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re helping a reader troubleshoot a misfiring Mopar 440 in a ’69 Dodge Charger. Q: I have a 1969 Dodge Charger that is giving me fits. It has a 440 high performance engine that is basically stock except for stainless valves,

I have a question. I am building a 427 cubic inch Dart motor with LS3 heads and a Kenne Bell 4.2L blower. I am looking for maximum horsepower out of this motor. What compression would you recommend? The blower is capable of 32 pounds of boost and it will run on E85. Thanks. – T.B. Wow,

I recently bought a really awesome street Camaro with a 355ci small-block, a Super T-10 4-speed, and a 12-bolt with 4.10 gears. The engine runs really great and pulls hard all the way to 6,500 rpm but it has this really bad knock when the engine’s cold. When I first took the car on a

You’ve got questions. We’ve got answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re suggesting upgrades for a supercharged 1959 Chevy Pickup with a 400 small block motor. Q: I want to build a 400 small block Chevy to put into a 1959 Chevy pickup with four-wheel drive. The truck will not be a

You’ve got questions, we’ve got answers. We work with the Summit Racing tech department to help you tackle your auto-related conundrums. In this week’s Mailbag, we’re troubleshooting carb issues in a 305-powered 1985 Chevy van. Q: My friend and I put a rebuilt 305 Chevy motor in my 1985 Chevy van. Since we did this, we’ve been having

You’ve got questions, we’ve got answers. We work with the Summit Racing tech department to help you tackle your auto-related conundrums. In this week’s Mailbag, we’re recommending a carburetor and gearing combo to combat an improperly shifting 700R-4 automatic transmission. Q: I have a 1986 ½-ton Chevrolet pickup with full time four-wheel drive. It has a 350 crate

Q: I have a 1973 Chevy El Camino with a 350 engine, a TH-350 transmission, and a 10-bolt rear axle with 2.73 gears. All of the parts inside the engine, trans, and axle are stock. The car is a daily driver. I have made some modifications that I hope will not only increase horsepower, but