Club Cobra GasN Exhaust  

Go Back   Club Cobra > Engine Building, Tuning, and Induction > Small Block Talk

MMG Superformance
Nevada Classics
Keith Craft Racing
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
Keith Craft Racing
Advertise at CC
Banner Ad Rates
MMG Superformance
Keith Craft Racing
March 2024
S M T W T F S
          1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31            
  #1 (permalink)  
Old 11-15-2016, 07:44 PM
bwcobra15's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2000
Location: Midlothian, TX
Cobra Make, Engine: Hurricane 427 Cobra #HM2008, Craft Performance 427w 600hp/600tq, TKO-600 close ratio, original Smiths gauges, lucas switches
Posts: 1,018
Send a message via Yahoo to bwcobra15 Send a message via Skype™ to bwcobra15
Not Ranked     
Default AFR 205 Heads

My new 427W engine from (Keith) Craft Performance Engines came with these heads, and there are two exhaust flange mounting holes. Inner holes 2" apart, and outer 3" apart.

I'd rather use the outer holes so the header tubes won't have to be crimped in because the bolts are so close. But I've found the outer holes are shallower, about 5/16" deep vs. the inner holes at 1/2" deep. The bolt size is 3/8".

The AFR flange bolts I have are 1" under the head and they bottom out on the outer holes.

I worry about the shallower holes having to support the weight of the header and sidepipes... Has anyone else tackled this dilemma?
Attached Images
  
__________________
Bob Worley
Hurricane HM-2008 build is done!! (for now....)
Craft Perfomance 427W / 600hp / 600tq - TKO600

I love it and I need it I bleed it ~ Yeah it's a wild hurricane ~ Alright, hold tight, I'm a highway star!!
Reply With Quote
  #2 (permalink)  
Old 11-16-2016, 02:34 AM
CC Member
Visit my Photo Gallery

 
Join Date: Jul 2010
Location: McMurray, PA
Cobra Make, Engine: Superformance #522
Posts: 528
Not Ranked     
Default

5/16 thread engagement is sufficient
Reply With Quote
  #3 (permalink)  
Old 11-16-2016, 06:15 AM
CC Member
Visit my Photo Gallery

 
Join Date: Mar 2009
Location: Mendota, IL
Cobra Make, Engine:
Posts: 693
Neutral     
Default

Where the shallower holes meant for studs?

Mark
Reply With Quote
  #4 (permalink)  
Old 11-16-2016, 12:58 PM
bwcobra15's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2000
Location: Midlothian, TX
Cobra Make, Engine: Hurricane 427 Cobra #HM2008, Craft Performance 427w 600hp/600tq, TKO-600 close ratio, original Smiths gauges, lucas switches
Posts: 1,018
Send a message via Yahoo to bwcobra15 Send a message via Skype™ to bwcobra15
Not Ranked     
Default

Quote:
Originally Posted by MAStuart View Post
Where the shallower holes meant for studs?

Mark
Thats a very good point.
__________________
Bob Worley
Hurricane HM-2008 build is done!! (for now....)
Craft Perfomance 427W / 600hp / 600tq - TKO600

I love it and I need it I bleed it ~ Yeah it's a wild hurricane ~ Alright, hold tight, I'm a highway star!!
Reply With Quote
  #5 (permalink)  
Old 11-17-2016, 09:19 AM
MFE III's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Apr 2006
Location: Los Angeles, ca
Cobra Make, Engine: Hurricane Motorsports, 427w
Posts: 437
Not Ranked     
Default

I never noticed that the outer holes are shallower. I used studs in my AFR's just for ease of taking off and installing the headers.
Matt
__________________
Hurricane Motorsports #1053; 427w
Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

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



All times are GMT -7. The time now is 11:48 PM.


Powered by vBulletin® Version 3.8.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0
The representations expressed are the representations and opinions of the clubcobra.com forum members and do not necessarily reflect the opinions and viewpoints of the site owners, moderators, Shelby American, any other replica manufacturer, Ford Motor Company. This website has been planned and developed by clubcobra.com and its forum members and should not be construed as being endorsed by Ford Motor Company, or Shelby American or any other manufacturer unless expressly noted by that entity. "Cobra" and the Cobra logo are registered trademarks for Ford Motor Co., Inc. clubcobra.com forum members agree not to post any copyrighted material unless the copyrighted material is owned by you. Although we do not and cannot review the messages posted and are not responsible for the content of any of these messages, we reserve the right to delete any message for any reason whatsoever. You remain solely responsible for the content of your messages, and you agree to indemnify and hold us harmless with respect to any claim based upon transmission of your message(s). Thank you for visiting clubcobra.com. For full policy documentation refer to the following link: CC Policy
Links monetized by VigLink