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,
I recently bought a FiTech Go EFI fuel injection system for my big-block Chevelle. The engine is a 468ci big-block with a mild hydraulic roller cam, a TH400, a warmed-over converter, and 3.55:1 gears in the 12-bolt. I used to run an 850 Holley. It ran great but always was rich. We installed the system
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
I have a ’66 Chevelle with a small-block and a TKO five-speed that’s been recently upgraded with better synchros. With the trans back in the car, I’ve noticed a bad vibration in the driveline at speeds above 60 mph. What’s weird is that when I have someone else in the car, the vibration is reduced.
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
I have a 472-cubic-inch engine in my ’69 Cadillac and I have a problem with oil vapor covering my nice new aluminum valve covers. I had a PCV valve on the engine, but at highway speeds it would sometimes push out the dip stick so I removed it and just put a big breather on the
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