Tech

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,

There is much to consider when choosing a carburetor for your vehicle. Airflow, choke style, and even the physical height of your carburetor will come into play. But what about the barrels? How do they work? And what type of secondaries do you want? Here are the basics you need to know about primary and

H-pipe vs. X-pipe? Which crossover exhaust system design is better? That depends, but we’re going to try to help you make the best choice. Where does the H-pipe or X-pipe go in your exhaust system? You always want to place the H-pipe or X-pipe as far upstream as possible because of the science behind how

There are four basic types of timing sets, and each have different pros and cons attached to them. The timing set that will work best for you is largely dependent on your particular vehicle application. In today’s video, COMP Cams’ Brandon Flannery will give you an overview of each type to help you choose the

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

Spin back the clock about 45 years or so. If you had an engine combination that could handle it, what you really needed was a tunnel ram with a couple of Holley 660 center squirters perched on top. If you burned corners, a cross ram with a couple of 650’s was the ticket. Over time,

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

These fully integrated supercharger kits from Sprintex USA can squeeze as much as 54-percent more horsepower from your engine, depending on your particular application. Sprintex supercharger kits feature a twin-screw compressor that significantly boosts the torque output of off-road machines at lower rpm, said Summit Racing tech advisor Carl Pritts, who explained that lower discharge temperatures

When it comes to choosing a carburetor, there are lots of things to consider: airflow, choke style, and secondary type, to name a few. But what about the physical height of the carburetor? The main reason carburetor height is important is hood clearance, especially on certain applications such as Corvettes, and big block Chevelles and Camaros. Most air cleaners and intake manifolds are listed with