Block Notching? - Page 2 - CorvetteForum - Chevrolet Corvette Forum Discussion


C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
Sponsored by:
Sponsored by:

Block Notching?

Reply
 
 
 
Thread Tools Search this Thread
Old 05-19-2018, 01:40 PM   #21  
Jebbysan
CF Senior Member
 
Jebbysan's Avatar
 
Member Since: Mar 2012
Location: New Braunfels Texas
Posts: 2,296
Thanked 210 Times in 188 Posts
Default

It is a common practice to notch a Mark 4 or Gen 5/6 block.
Prussina Blue the block or Dy-Kem.................mount a head gasket to the block......and scribe. Boom....there you go.
Mount the same gasket to the head and do the same thing. As long as you are inside the fire ring, you are fine. The need to do this goes away at over 4.500 bore......a 502 has a very small notch at 4.370 bore.
You can relieve it as far down as about half down the piston crown just above the top ring land.
No fear here.....just a steady hand and premium carbide bits from McMaster Carr. I like to use a large flute medium tree then finish with a tootsie roll style sanding roll.
Same way with the heads....just pay attention and blend, blend, blend.....removing as little as possible as you go until you are either confident, or the desired result is obtained.

Have fun

Jebby
Jebbysan is offline   Reply With Quote
Old 05-19-2018, 02:13 PM   #22  
bence13_33
CF Senior Member
Thread Starter
 
bence13_33's Avatar
 
Member Since: Aug 2000
Location: Clymer PA
Posts: 3,866
Thanked 13 Times in 13 Posts
Default

Jebbysan:
Do you think I have anything to worry about by having a block with a .000" deck height?
bence13_33 is offline   Reply With Quote
Old 05-19-2018, 03:09 PM   #23  
Jebbysan
CF Senior Member
 
Jebbysan's Avatar
 
Member Since: Mar 2012
Location: New Braunfels Texas
Posts: 2,296
Thanked 210 Times in 188 Posts
Default

Quote:
Originally Posted by bence13_33 View Post
Jebbysan:
Do you think I have anything to worry about by having a block with a .000" deck height?
Not at all......just follow the same procedure and do not get into the first ring land.......

When you get it all scribed.....bolt the head on, flip it over and shine a light bore......and you will see why notching is a good thing.
In fact.......scribe and relieve the block first and bolt the head on with Dy-Kem and scribe the bore to your head.....this is a better way to do it......

Jebby

Last edited by Jebbysan; 05-19-2018 at 03:11 PM.
Jebbysan is offline   Reply With Quote
Old 05-19-2018, 03:34 PM   #24  
derekderek
CF Senior Member
 
Member Since: Jul 2015
Location: Westville NJ
Posts: 2,381
Thanked 243 Times in 222 Posts
Default

And check your quench height and use the right thickness head gasket. A steel shim could be too thin.
derekderek is online now   Reply With Quote
Old 05-19-2018, 03:39 PM   #25  
Jebbysan
CF Senior Member
 
Jebbysan's Avatar
 
Member Since: Mar 2012
Location: New Braunfels Texas
Posts: 2,296
Thanked 210 Times in 188 Posts
Default

Quote:
Originally Posted by derekderek View Post
And check your quench height and use the right thickness head gasket. A steel shim could be too thin.
Good advice.....if running zero deck....then use a Fel-Pro or Mr. Gasket....
They crush at .039....perfect.

Jebby
Jebbysan is offline   Reply With Quote
Old 05-19-2018, 05:01 PM   #26  
L88Plus
CF Senior Member
 
Member Since: Aug 2004
Location: Lubbock TX
Posts: 1,635
Thanks: 0
Thanked 30 Times in 26 Posts
Default

Never heard of doing this on a small block, the chambers don't overhang onto the deck...
L88Plus is online now   Reply With Quote
Old 05-19-2018, 08:37 PM   #27  
toddalin
CF Senior Member
 
Member Since: Oct 2000
Location: Santa Ana CA
Posts: 7,360
Thanked 60 Times in 47 Posts
Default

Still, it unshrouds the intake and improves airflow into the cylinders.
toddalin is offline   Reply With Quote
Go Back   CorvetteForum - Chevrolet Corvette Forum Discussion >
Reload this Page
  • Block Notching?
  •  
     
    Reply


    Thread Tools Search this Thread
    Search this Thread:

    Click for 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

    Forum Jump

    Sponsored Ads
    Vendor Directory

    All times are GMT -4. The time now is 08:44 PM.


    We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
     
    • Ask a Question
      Get answers from community experts
    Question Title:
    Description:
    Your question will be posted in: