Thread: 429 question - hey EriK? Dave? Anyone?

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Steve, all these things need to be coordinated as a combination to achieve a particular goal. When someone says something like "heavy duty springs", it scares me a little. With any cam you buy, the manufacturer will have engineered the EXACT spring package to work in harmony with that particular camshaft and its particular characteristics.

I like using Crane Cams site, because it gives you all the info you need on one page.................
Idle quality
How to use the cam (daily driver/race/whatever)
Cruise rpm's
Operating rpm's
Minimum rpm's
Maximum rpm's
Valve float rpm's
Static compression ratio to use with this cam
All intake and exhaust valve opening and closing events
Lobe separation angle (at the bottom of the page under where it says max lift, there will be two values given which represent the centerline of the intake and exhaust valves. On this particular cam that I'm giving a link to, those figures are 107 and 117. Add those together and divide by 2 to arrive a a lobe separation angle of 112)
Intake and exhaust valve lift with a particular rocker ratio
Cam timing at SAE specs
Cam timing at 0.050" tappet lift
Springs required
On-seat pressure at installed height
Full spring pressure @ full lift height

Here's an example of what I'm talking about. This might be a cam to choose for a BBF, using the motor as a daily driver and building the c.r. at 8.0 to 9.5
http://www.cranecams.com/?show=brows...tType=camshaft