Reply to "408c cam spec advice"

George PAdmin.

That cam is a single pattern cam, it uses the same lobe for intake and exhaust. Bullet has a lobe that is damn near spot-on:

HR294/350

That's 294° advertised duration, 240° duration at 0.050", 0.3500" lobe lift. The lobe is rated "CRA" which means it has a conventional nose, its suited for "big block" valve train (large valves, high ratio rocker arms), and it has asymmetrical ramps.

So specify that lobe (HR294/350) for both intake and exhaust, specify a 109° "mathematic" intake lobe centerline and 119° "mathematic" exhaust lobe centerline. Specify a cam core that's compatible with Crane's steel distributor gear.

Since these lobes are asymmetrical the point of highest valve lift shall occur about 4 degrees earlier than the mathematic centerline. Bullet will have to provide the specifics.

2/19/166:03 PM

<ul id="{%=id%}ButtonGroup" class="button-group h-popup-buttons even-button-group even-1">
    <li id="{%=id%}Okay_buttonContainer"><a id="{%=id%}Okay" href="javascript:void(0);" class="button success no-margin-bottom h-alert-modal-ok-button" role="button">OK</a><script type="text/javascript">
        (function() {
            function {%=id%}Okay_click(event, data) {
            {%=id%}Popup.hide();
        }
        
                $('#{%=id%}Okay').on('click', {%=id%}Okay_click);
        })();
    </script></li></ul><a href="javascript:void(0);" class="close-reveal-modal" aria-label="Close Modal">&#215;</a><div class="last-modal-focus focus-utility-element" tabindex="0"></div>
</div>
<script type="text/javascript">
        (function() {
            {%=id%}Popup = new SS.Popup.ModalPopup('{%=id%}');
        })();
    </script>

Skip to main content

Membership Required

Remove From Your Block List

Manage Follow Preferences

Block

Please wait...