Let's talk about reshaping the combustion chamber to increase/ decreas compression - related to head - Honda-Tech


Let's talk about reshaping the combustion chamber to increase/ decreas compression - related to head

Reply
 
 
 
Thread Tools Search this Thread
Old 02-04-2005, 06:17 AM   #1
Honda-Tech Member
Thread Starter
 
Black R's Avatar
 
Join Date: Apr 2000
Location: Atlantis
Posts: 12,893
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
Black R is offline   Reply With Quote
Old 02-04-2005, 06:33 AM   #2
Honda-Tech Member
 
b19coupe's Avatar
 
Join Date: Mar 2002
Location: Southern California, U.S.A.
Posts: 9,857
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.
b19coupe is offline   Reply With Quote
Old 02-04-2005, 06:33 AM   #3
Honda-Tech Member
 
PirateMcFred's Avatar
 
Join Date: Oct 2003
Location: Betonwüsten, USA
Posts: 3,732
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
PirateMcFred is offline   Reply With Quote
Old 02-04-2005, 06:37 AM   #4
Honda-Tech Member
Thread Starter
 
Black R's Avatar
 
Join Date: Apr 2000
Location: Atlantis
Posts: 12,893
Default

Fixed post.

Thanks guys!

On with the discussion.....
Black R is offline   Reply With Quote
 
 
Reply

Related Topics
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) 595 10-23-2016 05:23 AM
How does combustion chamber cc relate to rpm, hp, and compression ? GarageAlchemist All Motor / Naturally Aspirated 1 02-25-2007 02:09 PM
Timing setting with milled head iperez Acura Integra Type-R 4 04-02-2004 11:57 AM
Top 20 basic tech Questions on .....CYLINDER HEAD PORTING johncarlos Forced Induction 10 02-29-2004 08:58 PM
Calculate compression ratio? 4doorH22 Honda Prelude 1 09-07-2001 06:01 AM


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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -8. The time now is 01:32 PM.


 
  • Ask a Question
    Get answers from community experts
What's your question?
Send