It isn’t always obvious which camshaft we should choose for our engine build. Even when we fully understand the individual timing events and how each of them interact in a four-stroke engine’s piston and valve motion, the complexity of it all can bring confusion and uncertainty to the cam selection process. We just learned about
The new Summit Pro LS camshafts have been a hit. The new product line launched in July and quickly developed a following. Just a quick recap: Summit Pro LS cams are made in the USA and ground on a Landis 3LB for excellent lobe quality. The lobes are quick, but not so overly aggressive as
When a camshaft is “degreed” it means the camshaft position in the engine has been synchronized with the crankshaft position. Degreeing the cam is the only positive means to determine if the rise and fall of the pistons correctly matches the opening and closing of the valves. Several degrees of misalignment can have a profound
In today’s video, engine builder Richard Holdener is going to show you the dyno results of a previously modified 5.0L Ford engine before and after a cam swap (and unplanned valve spring replacement). Before the cam swap, Holdener is starting with an engine constructed of a BluePrint Engines 306 cubic-inch short block crate engine (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 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
Camshafts and lifters are available in two basic formats—roller and flat tappet. And then within those two formats, they can either be of the mechanical (solid), or hydraulic variety. Fair enough. That should come as no surprise to most people reading this. But what makes up a flat tappet lifter? They’re typically hollow steel and
Camshafts are often erroneously blamed for valvetrain problems. Our friends at COMP Cams set the record straight in today’s video. It highlights several critical issues that are related to camshaft or lifter failure, but aren’t the fault of the cam or lifters—things like coil bind, oil contamination, and mechanical interference. More importantly, this video delves
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 a backfiring problem on a 427 big block Chevy. Q: I have a 1974 Olds Omega with a 427 cubic-inch big block Chevy. The engine has an Erson cam (292-degree duration,
I have a 496 Chevy and I want to go with a tunnel ram. What is the largest cam I can go with? It is going in a rat rod gasser. R.F. Jeff Smith: This is like asking “How high is up?” Generally, we like to answer questions that are a bit more focused, but
Q: I’m going to drop a GM LT4 Hot Cam into my Gen I small block Chevy. What valve springs do you recommend for the best match? A: Summit Racing put together a COMP Cams valve spring chart to help you choose the right components for your camshaft. The LT4 Hot Cam is a hydraulic roller with
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