Club Cobra Gas-N Exhaust  

Go Back   Club Cobra > Engine Building, Tuning, and Induction > 429/460 Engine Talk

MMG Superformance
Nevada Classics
Keith Craft Racing
Main Menu
Module Jump:
Nevada Classics
Nevada Classics
Keith Craft Racing
Keith Craft Racing
Advertise at CC
Banner Ad Rates
Keith Craft Racing
Keith Craft Racing
Keith Craft Racing
July 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 05-10-2006, 09:42 PM
CC Member
Visit my Photo Gallery

 
Join Date: Jun 2003
Location: Modesto, CA
Cobra Make, Engine: Heritage body, built the rest..460 Toploader..9"
Posts: 165
Not Ranked     
Default Rocker Arm Prefrence

Just was looking for some of what the 429/460 owners had chosen for rocker arms. I had a recent bad experience with a Crane energizer with the pin retaining the roller coming out and doing some moderate damage in the process. The heads I am using were not machined for screw in studs and use Cranes kit to allow for the use of 7/16 studs and adjustable rocker arms. Any thoughts?
__________________
6year Heritage A&F
&
1969 Hurst SC/Rambler(only 1,512 made) in the middle of restoration.
Reply With Quote
  #2 (permalink)  
Old 05-11-2006, 11:37 AM
ByronRACE's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2002
Location: Gilroy, CA
Cobra Make, Engine: West Coast Cobra w/ Centrifugally Blown Big Block, Pickles, Onions, on a Sesame Seed Bun.
Posts: 493
Not Ranked     
Default

What kind of cam specs are you looking at? What kind of spring pressures are you looking at?

I can't really make a rocker arm recommendation without it. Personally, I went with comp stainless roller tip pedistal mount and a jomar girdle. I'm running a roller cam with about 550 open and 150 closed and about .680 lift. My application is street/strip and I intend to rev it 7500rpm. My engine is a purpose built supercharged 429 CJ.

Depending on what you're after, this might be extreme overkill.

I like stainless rockers. They don't wear. They don't flex. They don't break. The jomar aluminum stud girdle further improves valvetrain rigidity, dampens harmonics, vibration, and audible valvetrain noise. My valvetrain is a solid roller...and you couldn't tell by listening to it.
Reply With Quote
  #3 (permalink)  
Old 05-11-2006, 01:17 PM
Senior Club Cobra Member
Visit my Photo Gallery

 
Join Date: Jan 2005
Location: VALLEY FORGE, PA
Cobra Make, Engine: SUPERFORMANCE w DOUG MEYER ENGINE
Posts: 1,958
Not Ranked     
Default

I like the stainless rockers too. Bigger bearings on them. Have to hold up better that way. Right?
Reply With Quote
  #4 (permalink)  
Old 05-11-2006, 01:53 PM
ByronRACE's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2002
Location: Gilroy, CA
Cobra Make, Engine: West Coast Cobra w/ Centrifugally Blown Big Block, Pickles, Onions, on a Sesame Seed Bun.
Posts: 493
Not Ranked     
Default Yes

The rocker manufacturers expect people to run crazy spring pressures and crazy ramp rates on the cam profiles with stainless performance rockers...they are meant to withstand significant abuse. You'll find the bearings are bigger/better and tighter tolerance than in most cases.

If you use these in a relatively mild combo, it won't be the weak link. Be careful of some of the cheap brands...they are look-alikes and have inferior bearings and bad finish work.

If you do intend to use a girdle, make sure you use ARP studs and make sure you TELL ARP you are using a girdle...or source the girdle and the studs from the same supplier. The studs otherwise will not necessarily be perfectly concentric relative to the threads where they engage the block; and if they are not...the girdle will not fit.

Byron
Reply With Quote
  #5 (permalink)  
Old 05-11-2006, 02:26 PM
Snakebit's Avatar
Club Cobra Member
Visit my Photo Gallery

 
Join Date: Nov 1999
Location: Salem,, NJ
Cobra Make, Engine: ERA 289 FIA #2100 Rio Red Wimbledon White Stripes 302 stroked to 331 Webers Richmond Road Race 5 speed
Posts: 781
Not Ranked     
Default

Comp Cams Pro Magnum in chromoly or stainless.
__________________
Snakebit
Reply With Quote
  #6 (permalink)  
Old 05-11-2006, 03:09 PM
Rick Parker's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: May 2001
Location: California, Ca
Cobra Make, Engine: NAF 289 Slabside Early Comp Car with 289 Webers and all the goodies. Cancelling the efforts of several Priuses
Posts: 6,592
Not Ranked     
Default

Well John........looks like stainless is the way to go.
__________________
Rick

As you slide down the Banister of Life, may the splinters never be pointing the wrong way
Reply With Quote
  #7 (permalink)  
Old 06-22-2019, 01:40 PM
cycleguy55's Avatar
CC Member
Visit my Photo Gallery

 
Join Date: Feb 2014
Location: White City, SK
Cobra Make, Engine: West Coast, 460 CID
Posts: 2,888
Not Ranked     
Default

A couple of weeks ago I opened mine up because it appeared oil was getting past the intake gaskets. D3VE heads that have been machined, studs, guide plates, positive valve stem seals, dual springs with dampers. I don't know what open and closed pressures are, as they came with car, along with a bunch of issues I've been addressing one by one.

Every one of my Comp Cams Magnum roller tip rocker arms is showing signs of heat to varying degrees. Some are a little bit discoloured, while others have a very noticeable bluing where they pivot on the balls. None of the balls showed discolouration or signs of heat - just the rocker arms themselves. I suspect the pressure of dual springs is a bit much for this type of rocker arm, and just another example of the problems I've been dealing with and the improper decisions that created them.

With the exception of 4 they were a b***h to get off, as the ball fulcrums seemed to bind on the stud. Well respected local speed shop guy says apparently these balls collapse over time. Not good. One of the balls is also missing a chunk of metal. Aaaarrrggghh.

Going full roller rocker arms.
__________________
Brian
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 10:01 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