How do you calculate maximum valve lift?

To figure this out, all you need is the radius of any valve opening in the cylinder head. This is approximate, to get a more exact answer you must have the diameter of the valve stem. Take this lift and divide it by the rocker arm ratio to get the maximum cam lift.

What is maximum valve lift?

Valve Lift is the amount (usually in inches) that the valve is lifted off of its seat. It is usually measured with a dial indicator at the tip of the valve. Tip: Maximum valve lift can be calculated by multiplying the maximum lobe lift times the rocker ratio.

What’s the Max valve lift on a SBC 350?

Can anybody tell me the max valve lift of a stock SBC 350. I have the stock 1.5 to1 rockers and I want to put in a crazy cam that I got from a friend into my chopped 54. The cam lobe lift is Int.-.358 & Exh.-.371 which with 1.5 to 1 rockers = Int.-.537 & Exh.- .557 of valve lift.

What’s the maximum lift on a 350 Cam?

This Cam is rated at .510 Lift, I heard the stock springs for the 350 can take like .470-.495 lift without overloading (Mine are 882 Heads). So my question is who makes a good set of springs I can put on these heads, Id like to be around .600 for max lift cause someday I plan to go to a 1.6 rocker arm ratio.

What’s the maximum lift on a valve head?

So my question is who makes a good set of springs I can put on these heads, Id like to be around .600 for max lift cause someday I plan to go to a 1.6 rocker arm ratio. It’s not just the springs. The bottoms of the retainers can hit the tops of the valve guides beyond a certain point. .510″ is typically past that point.

How big are the valve springs on a Chevy 350?

So I’ve been building this 1974 Chevy 350 and I recently picked up a new cam from the Hot Rod Barn, and its a little too big for the stock valve springs. This Cam is rated at .510 Lift, I heard the stock springs for the 350 can take like .470-.495 lift without overloading (Mine are 882 Heads).

What’s the Max valve lift of a stock 350?

You might have to go with taller springs which means machining the spring seats or running longer valves. If you want to put a big rumbly cam into a most stock engine – get a custom ground cam with about .450″ lift, a tight 106 lobe seperation, and lots of seat duration. The older slower rate of lift cams are good for applications like this.

Is there a maximum valve lift for 882 heads?

That cam with 1.6 rockets wont be near .600 lift so I wouldnt worry about it. It is way too big for the 882 heads for sure. Its not just the retainer to guide clearance but also spring pressure and the stock springs will flow if you try to spin it high enough for that camshaft to start working.

How do you calculate maximum valve lift?