Reply to "4V Heads"

panteradougMember

quote:
Originally posted by SIG:
Hello,
A friend has 4V heads and based on what some people write here in the forum he is investigating to put inserts into the intake ports to make them smaller. In this case you need also to modify or change the intake manifold, right? Is there somebody who already applied this modification and is willing to share his experience?
Brgds
SIG

No you do not change the intake manifold with port stuffers on 4v heads. Just install the stuffers and reinstall the intake manifold.

The stuffers reduce the size of the intake runner in the head and as a result increase the intake velocity.

It's an old idea that works and is relatively inexpensive compared to new heads.

I'm pretty sure that there are dyno numbers kicking around that will show a 25hp increase.

1/16/181:48 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...