why do most pistons have 4 valve reliefs - Northern California Ford Owners

This is topic why do most pistons have 4 valve reliefs in forum Tech Talk at Northern California Ford Owners .

To visit this topic, use this URL:
https://californiafords.com/cgi-bin/ultimatebb.cgi?ubb=get_topic;f=6;t=010313

Posted by gercolla1 (Member # 3068) on :

I know that the valves are not perpendicular to the piston on a 302.Is there reason for the extra reliefs?I noticed that when shopping for pistons the extra reliefs are an option. [burnout]

Posted by The Nick (Member # 2244) on :

Aftermarket pistons come with 4 sets because they have valve reliefs for the TFS Twisted Wedge heads, which are in a different location than other heads.

[ February 16, 2005, 11:21 PM: Message edited by: The Nick ]

Posted by CDT (Member # 5004) on :

most of them have 4 because it is easier for the manufacture not to have to make right and left pistons. Higher quality pistons only have two in most cases.

Fueled by Ford Mustang Owners
on CaliforniaFords.com