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-   -   Roller Rockers in Stock (https://classracer.com/classforum/showthread.php?t=36884)

X-TECH MAN 11-06-2011 03:37 PM
Re: Roller Rockers in Stock
 
Quote:
Originally Posted by Greg Hill (Post 291728)
Stud mounted rockers are what I was told and that jessel or t&d rockers are not legal. I think you all know what i meant.
The IHRA rule is no T&D or Jessel type system at all. If its a stud type OEM mounted rocker system then it has to stay that way. No conversions!!! If is an OEM shaft rocker system then shaft rockers are OK on combos that use them from the OEM such as the FE Ford, 273-360 Mopars, 361-440 Mopars and Hemis and others.
No trick set ups and must maintain OEM rocker ratios only. No under cut cam lobes with non OEM rocker ratios. No Jomar type girdles at all.

Greg Reimer 7376 11-06-2011 03:56 PM
Re: Roller Rockers in Stock
 
Quote:
Originally Posted by Aubrey N Bruneau (Post 291758)
I was wondering when someone would finally point that out !
I'm a Chevy guy... pre 73 that is. No shafts there. However, to my knowledge, don't most Mopars of that earlier era, have shaft rockers ?
I'm sure it's safe to assume that the new rule will at least madate that the engine has to possess the original rocker configuration.
Does that mean that the shaft-rocker engines will have an advantage ?
perhaps a little
That's the way it is.
What in the world do you use for a roller rocker on a 409? When I played with those things, the Ford 351 Cleveland rocker arm was pretty close, so was the Chevy 6-250-292 etc. type of rocker arm.Just curious what you do for those.

Aubrey N Bruneau 11-06-2011 05:10 PM
Re: Roller Rockers in Stock
 
Greg... BBC standard BBC 1.7 ratio ( factory W block is 1.75... but there's nothing in that ratio that handles this abuse ! ). Let's me use the BBC 7/16" stud. Cam has net lift at the valve, of .496" -.500". It all works.
Also, Crane has always had their P/N 15750 gold aluminum rocker for the W engine ( 3/8" stud )... it too, is 1.7 ratio.

Woodro Josey 11-06-2011 05:55 PM
Re: Roller Rockers in Stock
 
So, has anyone seen this in writing, i know Greg says Chris at Comp Cams has, but has anyone seen the rule laid out?:confused:

442OLDS 11-06-2011 05:58 PM
Re: Roller Rockers in Stock
 
Quote:
Originally Posted by Woodro Josey (Post 291794)
So, has anyone seen this in writing, i know Greg says Chris at Comp Cams has, but has anyone seen the rule laid out?:confused:
Right now,I would be more concerned about what Charley Downing posted:




Now all the news from SEMA. New carmaro looks great MPR did a great job like always.

New Stk rule changes on the table for 2012

64 car fields for ss and stk at all nationals but Indy.
For stock only 1980 and newer cars only.

Greg Hill 11-06-2011 06:55 PM
Re: Roller Rockers in Stock
 
Quote:
Originally Posted by 442OLDS (Post 291795)
Right now,I would be more concerned about what Charley Downing posted:




Now all the news from SEMA. New carmaro looks great MPR did a great job like always.

New Stk rule changes on the table for 2012

64 car fields for ss and stk at all nationals but Indy.
For stock only 1980 and newer cars only.
Surely you don't believe Charlie's BS.

442OLDS 11-06-2011 07:00 PM
Re: Roller Rockers in Stock
 
Quote:
Originally Posted by Greg Hill (Post 291807)
Surely you don't believe Charlie's BS.
No,but it is entertaining.

And I suppose the manufacturers would want to get rid of the older cars,since most of them win the National events.

X-TECH MAN 11-06-2011 07:10 PM
Re: Roller Rockers in Stock
 
Quote:
Originally Posted by 442OLDS (Post 291810)
No,but it is entertaining.

And I suppose the manufacturers would want to get rid of the older cars,since most of them win the National events.
The manufacturers want to see their NEW cars win National events. They dont give a "Flying you know what" about the old cars. I hope Charlie is wrong or pulling everyones leg but NHRA has pulled this stunt before in 1972 and got away with it.

Peter Ash 11-06-2011 08:02 PM
Re: Roller Rockers in Stock
 
Kind of makes you wonder, if the new COPO comes with roller rockers already? This possibly being the reason for the suggested rule change? Wouldn't that be a nit in the soup for the CJ and DP bashers, lol.

james schaechter 11-06-2011 08:03 PM
Re: Roller Rockers in Stock
 
Interesting letter to the Editor that was in a 1970 Dragster that I bought at a swap meet today.

http://i256.photobucket.com/albums/h...r/dragnews.jpg


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