|
427 FE heads 68cc vs 72cc chamber size
Is bigger always better? can stock fe 68 cc heads be reworked to out perform stock fe 72cc heads ? Can you run medium riser valves with 68cc?
|
Bigger is worse with combustion chambers. The smaller chambers give a higher compression ratio and more bang. They also require a higher octane fuel to stop pinking etc. The head rise you refer to are intake port related and valves don't change. The best combination for performance and fit under the bonnet is small chamber, big valves and medium riser. If you do a search there's a lot of head info available.
Cheers Nick |
Mike,
You have to look at the big picture. Given your bore,stroke,deck height,compressed head gasket thickness, piston valve pocket volume,a 72cc chamber may result in the compression ratio your looking for. The only way to know is to do the math. If your looking to build an engine that will run on pump gas and a 68cc chamber results in a 12:1 compression ratio, smaller may not be better given your requirments. Take care, Steve |
Fellow Club Cobra members, I did not post the
message you responded to - don't know what's going on here - this has happened once before. I have reported it to the moderator. I'm a small block kind of guy but I appreciate the help fellow members are always willing to offer! Best regards, Mike |
| All times are GMT -7. The time now is 01:36 AM. |
Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2025, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: