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 helping a reader find low-end power in his ’70 Dodge Charger. Q: I have a 1970 Dodge Charger that weighs 3,700 pounds. It has a 3.91 posi rear axle and an 8:1
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
Better understand compression ratio, how to calculate it, piston-to-wall clearance, how to adjust it depending on the power your engine produces, and more by watching this Summit Racing Quick Flicks video.
Got questions? We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we help a reader overhaul his Rat motor for street/strip performance. G.T. • Keaau, HI Q: I have 1973 454 big block Chevy. It has 8.5:1 compression, stock oval port cylinder heads, a Crane PowerMax camshaft, an Edelbrock Performer
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