what bore should my head gasket be? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum

Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
lost password?   |   register now

LinkBack Thread Tools
  #1 (permalink)  
Old 02-07-2010, 12:28 PM
Registered User
Last photo:
Join Date: Jan 2010
Location: Vancouver, B.C.
Posts: 142
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
what bore should my head gasket be?

hey guys just wondering what bore head gasket I should be buying for my build. Its a 383 bored 0.040" over and I see gasket bores vary tremendoulsy from bores of 4.200" to 4.040". I know the larger the gasket bore the lower the compression ratio is going to be but what is minimum gasket bore one should buy in relation to cylinde bore? I plan on zero decking the block to 9.000" so the pistons are flush with the deck at TDC and getting a 0.040" think head gasket. This should give me around 10:1 compression ratio with flat tops, is the best way to do this? I am just unsure of what the pro's and con's are to say using a 4.160" bore head gasket in a 4.040" block. Please clear this up for me, thanks.

Reply With Quote Quick reply to this message
Sponsored Links
  #2 (permalink)  
Old 02-07-2010, 02:45 PM
Registered User
Join Date: Jul 2009
Location: Veneta,OR
Posts: 58
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
All depends on the combustion chamber on the head. Gasket cannot protude on the chamber. It must be completly sandwiched between the block and head. This is what I have been told.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 02-07-2010, 02:58 PM
automotive breath's Avatar
Registered User
Last photo:
Join Date: Mar 2006
Location: New Orleans
Posts: 891
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
Originally Posted by V3500
...Gasket cannot protude on the chamber...
This is right, anything bigger than this is a waste. If you put a gasket with
bore that's way bigger than the bore you are increasing crevice space. The
fuel air mixture thats compressed into this crevice either does not burn
well or not at all.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
Which head gasket & how much will compression raise? 5_speed Engine 15 01-29-2009 08:07 AM
Water passage in head gasket too small? ssmonty Engine 3 01-11-2009 08:05 PM
390 FE Blown head gasket: Thinking Man Engine 21 01-23-2007 06:31 PM
sbc 350 Head Gasket question oregon chevelle Engine 1 04-24-2006 01:25 PM
Cracked Head or Blown Gasket? '71 rag top Engine 1 12-15-2004 10:08 PM

All times are GMT -6. The time now is 10:04 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.