Compression ratio estimate from measured PSI - Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 05-29-06, 07:28 PM Thread Starter
Registered User
 
AXR88U's Avatar
 
Join Date: Sep 2003
Location: Sydney NSW
Age: 41
Posts: 37
Question Compression ratio estimate from measured PSI

I know that these types of tests are only a guide and vary depending on cam intake timing. Just after a rough guestimate, of what you fellas with 11.5:1 are getting and with what intake timing.

I was getting roughly 190psi with 230@050 intake lobe


--------------------------------------------------

Better off with not enough traction than not enough power
AXR88U is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 05-29-06, 08:00 PM
Nitrous Junkie
 
DJS351XD's Avatar
 
Join Date: Mar 2005
Location: Perth WA
Age: 37
Posts: 98
Re: Compression ratio estimate from measured PSI

You can't really get an idea... Mate's roller Clevo had 11.34:1 with a 270@0.050" Crane, and it had 100psi cranking pressure.
DJS351XD is offline  
post #3 of 5 (permalink) Old 05-29-06, 09:18 PM Thread Starter
Registered User
 
AXR88U's Avatar
 
Join Date: Sep 2003
Location: Sydney NSW
Age: 41
Posts: 37
Re: Compression ratio estimate from measured PSI

Your right about that, especially with that bigger cam duration difference.

I was hoping there was someone around with about the same intake duration as mine.

--------------------------------------------------

Better off with not enough traction than not enough power
AXR88U is offline  
post #4 of 5 (permalink) Old 05-31-06, 04:36 AM
Registered User
 
smally351's Avatar
 
Join Date: Oct 2004
Posts: 456
Re: Compression ratio estimate from measured PSI

see if this helps
http://not2fast.wryday.com/turbo/com...pressure.shtml
smally351 is offline  
post #5 of 5 (permalink) Old 06-01-06, 05:21 AM Thread Starter
Registered User
 
AXR88U's Avatar
 
Join Date: Sep 2003
Location: Sydney NSW
Age: 41
Posts: 37
Re: Compression ratio estimate from measured PSI

cheers,
Thanks for that info.

--------------------------------------------------

Better off with not enough traction than not enough power
AXR88U is offline  
Sponsored Links
Advertisement
 
Reply

  Ford Forums - Mustang Forum, Ford Trucks, Ford Focus and Ford Cars > The Garage - Tech Forums > Engine Specific Tech > Windsor Tech
Gear in this thread - Powered by O'Reilly Auto Parts


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome