Cylinder Head Clearance question?? - Team Camaro Tech
Tech 2002 General Tech questions from 2002
Replies ONLY, no new topics.

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old Apr 16th, 02, 02:20 PM Thread Starter
Senior Tech
 
Join Date: May 2001
Location: Mass
Posts: 252
I am going to be changing heads soon..I want to go with 64cc heads with 206/190 valves...The original builder of the engine tells me he ran KB domed pistons with valve reliefs..The builder states that the KB setup recomended 64cc heads to acheive a 10-7-3 compression..But when the cam was changed so was the were the heads to 76cc...Do you guys think I am going to have clearance issues if I go back to 64cc..Would running the KB domes with 64cc heads and a 5.15 lift on the cam..Be to much..Thanks in advance
Badcaiman is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old Apr 16th, 02, 07:24 PM
Senior Tech
 
Join Date: Feb 2002
Location: Williamstown,PA
Posts: 500
Everything I know about small blocks tells me with a 64cc head and flat tops you get around 10:1 compression. I'm running 58cc bowtie heads with flats and getting about 10.8:1. With a .100 dome and a 64cc head in a 350 you're looking at about 11.5:1, a liitle less in a 327 and a little more in a 400. If you're planning on running pump gas stick with the bigger heads.

------------------
'69 RS Camaro
355 5-speed 4.11
1 2RUN is offline  
post #3 of 4 (permalink) Old Apr 16th, 02, 10:45 PM
 
Join Date: Oct 2000
Posts: 1,273
In my opinion, duration is as important as lift when it comes to piston to valve clearance. Maybe more so.
You could always mock it up with the new heads to make sure you have enough clearance.
Toby Keen is offline  
 
post #4 of 4 (permalink) Old Apr 17th, 02, 02:43 PM
Senior Tech
 
Join Date: Mar 2002
Location: San Francisco, CA 94114
Posts: 103
I run 64cc heads with '69 Z28 domed pistons and a .524" lift, 254 degrees duration camshaft. The only way to be sure is to bolt the heads up and do a valve drop 10 degrees before and after TDC. I had plenty of piston-to-valve clearance, but the modern combustion chamber shape required a short spark plug to keep from hitting the piston domes.
NeilB is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










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 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