Club Cobra Gas-N Exhaust  

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

Keith Craft Racing
Nevada Classics
MMG Superformance
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
Keith Craft Racing
MMG Superformance
Advertise at CC
Banner Ad Rates
MMG Superformance
Keith Craft Racing
MMG Superformance
MMG Superformance
April 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        

Kirkham Motorsports

Like Tree1Likes
  • 1 Post By blykins

Reply
 
LinkBack Thread Tools Rate Thread Display Modes
  #1 (permalink)  
Old 08-17-2014, 11:21 AM
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2004
Location: Shawbury,
Posts: 325
Not Ranked     
Default Forged crank and balancer for 306

What crankshaft and balancer would you recommend?

I tend towards the Scat 43021 http://www.summitracing.com/int/part...3021/overview/

-Simon

Last edited by CobraV8; 04-11-2024 at 05:40 AM..
Reply With Quote
  #2 (permalink)  
Old 08-17-2014, 03:32 PM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2001
Location: Louisville, KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,391
Send a message via AIM to blykins
Not Ranked     
Default

I would use a forged crank, but honestly, any crank you use will probably out live the block at almost 600 hp. They split in half at lower levels than that.
__________________
www.lykinsmotorsports.com
Reply With Quote
  #3 (permalink)  
Old 08-17-2014, 05:15 PM
CC Member
Visit my Photo Gallery

 
Join Date: Oct 2003
Posts: 4,078
Not Ranked     
Default

Quote:
Originally Posted by blykins View Post
I would use a forged crank, but honestly, any crank you use will probably out live the block at almost 600 hp. They split in half at lower levels than that.
A World won't-saw close to 2000 in a Fastest Street car app.
Did you ever see a Dart split Brent? I just don't know.
__________________
Chas.
Reply With Quote
  #4 (permalink)  
Old 08-18-2014, 01:52 AM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2001
Location: Louisville, KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,391
Send a message via AIM to blykins
Not Ranked     
Default

No, but I assumed he was using factory block.
__________________
www.lykinsmotorsports.com
Reply With Quote
  #5 (permalink)  
Old 08-18-2014, 08:34 AM
CC Member
Visit my Photo Gallery

 
Join Date: Jan 2004
Location: Shawbury,
Posts: 325
Not Ranked     
Default

I think a forged crank might be cheap insurance for even such a relatively mild engine, considering the effects of a crank breaking at a 4500rpm launch with nitrous.

Also the bottom end would be ready for some higher revs if I ever feel the need to go to a solid roller in the future.

So what brand can be recommended? I used Scat I-beam rods in the past and was very pleased with the quality.

Last edited by CobraV8; 04-11-2024 at 05:41 AM..
Reply With Quote
  #6 (permalink)  
Old 08-18-2014, 08:55 AM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2001
Location: Louisville, KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,391
Send a message via AIM to blykins
Not Ranked     
Default

I would go with a Scat forged crank and Scat I-beam rods.
Jerry Clayton likes this.
__________________
www.lykinsmotorsports.com
Reply With Quote
  #7 (permalink)  
Old 08-18-2014, 09:06 PM
xb-60's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Aug 2009
Location: Adelaide, SA
Cobra Make, Engine: AP 289FIA 'English' spec.
Posts: 13,142
Not Ranked     
Default

Quote:
Originally Posted by blykins View Post
I would go with a Scat forged crank and Scat I-beam rods.
Brent - external or internal balance?
Cheers,
Glen
Reply With Quote
  #8 (permalink)  
Old 08-19-2014, 02:54 AM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2001
Location: Louisville, KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,391
Send a message via AIM to blykins
Not Ranked     
Default

If I were building this engine for the application he was intending, I would internally balance it.

However, in his case, it would depend on several things...if he already has a balancer and flywheel, how light his pistons and rods are, and if he had the budget to internally balance.
__________________
www.lykinsmotorsports.com
Reply With Quote
  #9 (permalink)  
Old 08-19-2014, 03:38 PM
PANAVIA's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2008
Location: San Jose CA, CA
Cobra Make, Engine: SPF_R_/BRG/FRBoss302/327CI/FordEFI/Under_Car_Exh/
Posts: 2,523
Not Ranked     
Default

+1 for internally AKA 0 balance - Scat or Eagle Forged and nice Hbeam Rods

this should get you to 400hp.

Steve
__________________
Steve SPF 2734 MK3 / Brock Coupe #54- panavia.com
Reply With Quote
  #10 (permalink)  
Old 08-19-2014, 09:24 PM
xb-60's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Aug 2009
Location: Adelaide, SA
Cobra Make, Engine: AP 289FIA 'English' spec.
Posts: 13,142
Not Ranked     
Default

Hasn't the jury come out in favour of Scat forged cranks over Eagle?
If it's a Scat crank, which the OP favours, do Scat do a neutral/zero balance 3" stroke forged crank?
Cheers,
Glen

Last edited by xb-60; 08-19-2014 at 09:27 PM.. Reason: spellin erra
Reply With Quote
  #11 (permalink)  
Old 08-20-2014, 02:46 AM
CC Member
Visit my Photo Gallery

 
Join Date: Dec 2001
Location: Louisville, KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,391
Send a message via AIM to blykins
Not Ranked     
Default

Yes, the jury is absolutely out....

And yes, Scat offers a 3" stroke crank that will internally balance.
__________________
www.lykinsmotorsports.com
Reply With Quote
Reply


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 08:47 AM.


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