Go Back   Honda-Tech > Honda and Acura Technical Forums > All Motor/ Naturally Aspirated
Sign in using an external account
Register Forgot Password?
Search


Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
Old 02-04-2005, 07:17 AM   #1
Honda-Tech Member
 
Black R's Avatar
 
Join Date: Apr 2000
Location: Atlantis
Posts: 12,700
iTrader Rating: (0)
Send a message via AIM to Black R
Default Let's talk about reshaping the combustion chamber to increase/ decrease compression - head work

I know a stock b16 head vs a stock b18c head has a different volume and that by simply changing heads you can increase compression...

I'm really interested in how much you can open up the combustion chamber of a head to increase the volume, but at the same time how much compression do you lose?

And vice versa, a properly rewelded and reshaped (and of course ported + polished) head will be able to effectively raise compression as well... correct?

Since we are dealing with finite amounts of mass - what is the point of diminshing returns... I'm assuming you'll hit a coolant passage if you overport.

Also, how much can you raise or lower the static compression ratio by reshaping the head?

How much flow can you gain or lose by reshaping the head?

Let's talk about different head packages/ stages.

Let's not limit ourselves to stock bore - but discuss overbore (84-86mm) head's as well.....


Modified by Black R at 10:36 AM 2/4/2005


Modified by Black R at 10:38 AM 2/4/2005
__________________
Toda itb's for sale:

http://hondamarketplace.com/showthread.php?t=3064222
Black R is offline   Reply With Quote
Old 02-04-2005, 07:33 AM   #2
Honda-Tech Member
 
b19coupe's Avatar
 
Join Date: Mar 2002
Location: Southern California, U.S.A.
Posts: 9,858
iTrader Rating: (0)
A Gamer Tag 000
Default Re: Let's talk about reshaping the combustion chamber to increase/ decreas compression - related to

Quote:
Originally Posted by Black R
This will also affect displacement, correct?
Combustion chamber volume does not affect displacement. Displacement is a function of bore and stroke.
__________________
Church Automotive Testing
b19coupe is offline   Reply With Quote
Old 02-04-2005, 07:33 AM   #3
Honda-Tech Member
 
PirateMcFred's Avatar
 
Join Date: Oct 2003
Location: Betonwüsten, USA
Posts: 3,705
iTrader Rating: (0)
Default Re: Let's talk about reshaping the combustion chamber to increase/ decreas compression - related to

The ONLY things that change the displacement are the bore and stroke. You cannot do anything to the head to change an engine's displacement.

Adding or removing material, or changeing the volume of the head will affect compression.

Pirate
__________________
Tired of the same ol' BS? Some place better: LINK
Rotrex BA8 project car.
NA stroker BB2 commuter.
PirateMcFred is offline   Reply With Quote
Old 02-04-2005, 07:37 AM   #4
Honda-Tech Member
 
Black R's Avatar
 
Join Date: Apr 2000
Location: Atlantis
Posts: 12,700
iTrader Rating: (0)
Send a message via AIM to Black R
Default

Fixed post.

Thanks guys!

On with the discussion.....
__________________
Toda itb's for sale:

http://hondamarketplace.com/showthread.php?t=3064222
Black R is offline   Reply With Quote
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
[FAQ] SOHC upgrades *REVISED* It's long and is a work in progress. Spade Honda Civic/Del Sol (1992 - 2000) 593 05-19-2014 01:01 AM
Combustion chamber volume-GSR hYbRid_Eg6 All Motor/ Naturally Aspirated 4 03-10-2012 08:26 AM
CR Calculations and Compression Testing flyrod Honda Prelude 16 10-29-2010 07:55 AM
Timing setting with milled head iperez Acura Integra Type-R 4 04-02-2004 12:57 PM
Top 20 basic tech Questions on .....CYLINDER HEAD PORTING johncarlos Forced Induction 10 02-29-2004 09:58 PM


Tags
chamber, combustion, compression, dish, doescompression, engine, head, honda, increase, increasing, piston, reshape, reshaping, reweld, volume

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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



Join Honda-Tech.com

All times are GMT -8. The time now is 09:12 PM.



2014 Copyright, InternetBrands Inc.
Powered by vBulletin® Version 3.8.7 AC1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.

Honda and the Honda marquee are registered trademarks of the American Honda Motor Company, Inc. Neither American Honda Motor Company nor its subsidiaries or affiliates shall bear any responsibility for Honda-Tech.com content, comments, or advertising. Honda-Tech.com is not affiliated with American Honda Motor Company in any way. American Honda Motor Company does not sponsor, support, or endorse Honda-Tech.com in any way. Copyright/trademark/sales mark infringements are not intended or implied.
Emails & Contact Details