Q: I have rebuilt a 1984 Suburban 4×4. I replaced the 350 with a 402 big block with 10:1 compression, and rebuilt a 700R-4 transmission with a Corvette servo. The problem I have concerns the transmission. It shifts fine if you hammer the throttle or in open highway driving. But if you accelerate too slowly,
Q: I have a 1967 Camaro Rally Sport that is about 85-percent completed. The car will be a street machine with some occasional drag racing at the local track. My question has to do with shocks. I would like to know how to interpret shock ratios (90/10, 60/40, etc.). What do the numbers stand for,
This week in our Mailbag, the Summit Racing tech department is troubleshooting bearing-clearance measurement and engine-cranking issues in a small block Chevy. Q: I’m building a 350 Chevy engine and have a problem. When I torque the main bearings down, the crank is very hard to turn over. When I install the connecting rods, the starter
Q: Last year, I rebuilt my Ford 300 cubic-inch straight-six engine. The head was shaved .010”, the valve seats were reground, and the crank resized. The block was bored and cleaned also. The cam is a Competition Cams 260H grind with matched lifter, pushrods, and rocker arms. I also installed a new oil pump. The problem
Q: I have a question about engine compression. What would the following compression ratios be in terms of pounds per square inch (psi) of cylinder pressure? 8:1 compression 9:1 compression 10:1 compression 11.1 compression The reference engine is a small block Chevy 350 bored .030 inches over. A: Cylinder compression and cylinder pressure are not directly related
Q: I am in the process of building a 383 stroker engine for my 1989 Camaro. It should produce about 450 horsepower (the current engine’s a V6). Will the stock rear axle be able to handle that much power? If the axle is no good, which one would you recommend using? Will I need to install
Q: I built a 6-71 supercharged 355 c.i.d. Chevy. It ran fine for two summers until I took the car to the track to dial it in. On the fourth pass, the engine misfired through the blower. The blow-off valves on the supercharger intake manifold released like they were supposed to. When I got back to
Q: I have a Ford 428 engine and I’m installing AN fittings on the heater hoses. The fitting that goes to the intake manifold requires a standpipe. How can I install a standpipe on an AN fitting? A: Normally you’d have to piece together several fittings to get the results you’re looking for. However, JOES
Q: I need a set of Chevy small block motor mounts for my 1969 Camaro. I’ve been told there are two sizes available. How do I determine which size is correct? A: In the early years, Chevy used two different motor mounts. The “short and wide” version measures 2⅝ inches between the ears, and 1¾ inches from the
Q: I own a 1971 Dodge Demon with a 400. The 10.5:1 compression engine has a forged crank and “LY” rods, and has a balanced bottom end. The heads are 906 castings port matched to a Weiand Team G intake and 2.5-inch headers. The heads have also had port work done. The cam is a Mopar Performance
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