Raising Compression Ratio w/ Head Gaskets - Ford Muscle Forums : Ford Muscle Cars Tech Forum
FordMuscleForums.com is the premier Ford Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools
Old 03-17-2005, 06:24 PM   #1 (permalink)
Registered User
 
Join Date: Nov 2003
Posts: 189
Raising Compression Ratio w/ Head Gaskets

I would like to raise my compression ratio, currently calculated at 8.7:1 to ~9:1 if possible. I have a 289 bored 30 over and flat top pistons with small valve reliefs (stock compression ratio - 9.8:1). I have switched out the stock heads (54.5cc) to a later year with 64.5cc.

I have no plans to tear the bottom end apart.

Does anyone know who makes the thinnest head gaskets and should I also mill the heads to achieve this?

Thanks.
archoplites is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Old 03-17-2005, 09:40 PM   #2 (permalink)
Registered User
 
Join Date: Oct 2004
Posts: 157
Raising Compression Ratio w/ Head Gaskets

Not sure but I think that the average max gain by thin gaskets is about .5. Same for milling heads but then you get into milling the intake to fit and then valve train geometry stuff. Possibility of valve to piston problems too.
ccso640 is offline   Reply With Quote Quick reply to this message
Old 03-17-2005, 10:10 PM   #3 (permalink)
Registered User
 
Join Date: Jun 2004
Location: Catonsville, MD
Posts: 502
Raising Compression Ratio w/ Head Gaskets

you will get the best results if you go back to early '60's heads; either the 55 cc oreven better, the 46-49 cc heads. hipo heads with flat tops were 10:1 motors with the 46-49 cc heads stock. all oem heads have the same porting potential, its just that you must remove more metal in the ports of the early heads.
__________________
Dave Shea
S/ST 1818 S/P 1018 H/R 1564
igo1090 is offline   Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Muscle Forums : Ford Muscle Cars Tech Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -7. The time now is 04:16 AM.



Powered by vBulletin® Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0
 

Garage Plus vBulletin Plugins by Drive Thru Online, Inc.