Cobra Club Forums
Cobra Club Forums

Welcome to the Cobra Club Forums forums.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   Cobra Club Forums > Tech Tips > Engine Tech Tips & Questions
Home Forums Blogs Videos Gallery Cobra Marques Info Groups Classifieds Gallery Arcade Shopping
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 06-05-08, 02:04 PM
Senior Member
 
Join Date: Mar 2007
Location: Northampton
Age: 33
Posts: 282
Chevy 350 Compression Ratio question

I'm trying to figure-out what static CR to aim for when I replace the existing top-end on my engine. From what I've read, I should aim for a dynamic CR of max 8.2:1. This is assuming I'll be using Super Unleaded (equiv. to 93 Octane US). With my Performer RPM cam (intake timing @ 44* ABDC), that would mean a static CR of 9.1:1. However, Edelbrock's Performer RPM crate engine runs a static CR of 9.5:1 using the same cam, which would yield a dynamic CR of 8.6:1, according to this calculator:

Wallace Racing: Dynamic Compression Ratio Calculator

I'm confused... can someone clarify for me?

Cheers,
Ian.
__________________
2003 DAX Tojeiro De Dion
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Sponsored Links
Advertisement
  #2 (permalink)  
Old 06-05-08, 02:13 PM
JamesP's Avatar
Senior Member
 
Join Date: Jul 2002
Location: Geneva, Switzerland.
Posts: 266
Have a look at Llyods post below:

"Help! Heads/Manifold Coolant ports"

This model may help with your question as well

James
__________________
Megasquirted 383 SBC built but yet to start.
Dax De Dion chassis safelty in garage.
Permission to spend money in March - rolling chassis here we come
Digg this Post!Add Post to del.icio.usBookmark Post in TechnoratiFurl this Post!
Reply With Quote
Sponsored Links
Advertisement
Reply

Thread Tools
Display Modes

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

vB 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
compression ratio Splitpin General Tech Tips & Questions 1 28-11-04 11:57 AM
Help required with compression ratio... Andy302 General Tech Tips & Questions 23 22-08-04 09:50 PM
Compression ratio with this combo? Andy302 General Tech Tips & Questions 3 15-08-04 08:09 AM
Compression Ratio. Andy302 General Tech Tips & Questions 4 15-01-04 05:29 PM
compression ratio steve_ram General Tech Tips & Questions 2 20-08-03 10:36 AM


All times are GMT. The time now is 10:35 AM.


Powered by vBulletin® Version 3.7.0 Beta 4
Copyright ©2000 - 2008, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.2.0