Roller Rockers in Stock

[Greg Hill]

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.

[Woodro Josey]

So now, does it have to be a certain mfg or is any mfg legal, for the stud mount rocker?

[Ed Myers]

News flash !! Some engine's come with a shaft from the start ! Some Ford
FE and some GM and Dodge and the list goes on .

[Aubrey N Bruneau]

Originally Posted by Ed Myers

News flash !! Some engine's come with a shaft from the start ! Some Ford
FE and some GM and Dodge and the list goes on .

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.

[Greg Reimer 7376]

Originally Posted by Aubrey N Bruneau

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]

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]

So, has anyone seen this in writing, i know Greg says Chris at Comp Cams has, but has anyone seen the rule laid out?

[442OLDS]

Originally Posted by Woodro Josey

So, has anyone seen this in writing, i know Greg says Chris at Comp Cams has, but has anyone seen the rule laid out?

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.

[X-TECH MAN]

Originally Posted by Greg Hill

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.