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Pedestal shims #1712068
12/17/14 07:11 PM
12/17/14 07:11 PM
Joined: Nov 2003
Posts: 1,358
Out of the State of Confusion
blue_stocker Offline OP
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Out of the State of Confusion
Years ago, RAS sold rocker shaft pedestal shims to correct rocker arm geometry. Unfortunately, they have not been available for some time, so...I've been looking around and wondering if anybody knew of any shaft shims being made or available? Thanks...

Re: Pedestal shims [Re: blue_stocker] #1712069
12/17/14 07:32 PM
12/17/14 07:32 PM
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GTX MATT Offline
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There is a guy on here named Mike Beachel that sells something like that. B3RE is his username.


Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
Re: Pedestal shims [Re: blue_stocker] #1712070
12/17/14 07:42 PM
12/17/14 07:42 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Mancini sells them(or use to).. they HAVE to taper
out to zero at the ends or you WILL bust the stands

Re: Pedestal shims [Re: blue_stocker] #1712071
12/17/14 08:18 PM
12/17/14 08:18 PM
Joined: Jan 2003
Posts: 1,289
Tucson AZ,
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MadMopars Offline
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Quote:

Years ago, RAS sold rocker shaft pedestal shims to correct rocker arm geometry. Unfortunately, they have not been available for some time, so...I've been looking around and wondering if anybody knew of any shaft shims being made or available? Thanks...




B3RacingEngines.com


[img]https://s9.postimg.cc/6fbjxzfvv/48-2016-_Drag-_Weekend-_Best-_Burnouts-lpr.jpg[/img]


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64 F100 *383*4 SPEED*9"*
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99 DODGE RAM 3500 4X4 DUALLY... ON 38"s
Re: Pedestal shims [Re: blue_stocker] #1712072
12/17/14 09:29 PM
12/17/14 09:29 PM
Joined: Nov 2003
Posts: 1,358
Out of the State of Confusion
blue_stocker Offline OP
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Out of the State of Confusion
You're right about damaging the pedestals Mike, cracking WILL happen and usually just by torquing the shafts in place. When I built my first stocker engine I tried to get both lifter preload and geometry corrected using .015" shim stock and while it 'sort of' worked, it wasn't long after I noticed the tell-tale crack in the pedestal... oops! That was back when we HAD to use non-adjustable production rockers according to the NHRA rules at the time, hmm...back in the ice-age?! It didn't take me long to figure that wasn't the route to go, but the crescent-shaped shims are. Unfortunately, I no longer have access to the machine tools needed to reproduce these or I'd be making and probably selling them myself.

There's a real good article on the B3Racing page about geometry and good information as well. The sweep is one of the more important items not only for efficiency but parts longevity as well. Thanks for the heads-up fellas, much appreciate.

Re: Pedestal shims [Re: blue_stocker] #1712073
12/17/14 09:57 PM
12/17/14 09:57 PM

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I used to love the tapered shims--hate we can't get them but....I have used dozens of sets of home made shims over the years--always with stamped rockers and hyd cams--I have never split a stand. I understand the math and all but they work on regular old street engines vs. ordering expensive pushrods. Yea I know about geometry but on a stamped rocker the pad is plenty big enough and correcting lifter preload vs. having the plunger down is a big big deal even on a Plain Jane.

Re: Pedestal shims [Re: ] #1712074
12/17/14 10:15 PM
12/17/14 10:15 PM
Joined: Oct 2010
Posts: 463
Rescue CA.
joes68340s Offline
mopar
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Rescue CA.
Hughes sells them I recently bought some.

Re: Pedestal shims [Re: joes68340s] #1712075
12/18/14 06:50 AM
12/18/14 06:50 AM
Joined: Jan 2007
Posts: 10,115
A Red State
SNK-EYZ Offline
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Quote:

Hughes sells them I recently bought some.




From their website.
http://www.hughesengines.com/Index/produ...mp;partid=10406

HUG 1710

ROCKER STAND SHIM KIT

PRICE IS FOR (10)OF THE .020" 1708 & (10) OF THE .040" 1709 SHIMS

$35.00



Click Here to view shim installation instructions


Kayse can't keep up at all now. lol
Re: Pedestal shims [Re: blue_stocker] #1712076
12/18/14 11:11 AM
12/18/14 11:11 AM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
Taking time off to work on my car
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Val-haul-ass... eventually
The last ones I bought from Mancini were NOT tapered.

The last time I bought shims from Hughes they were, but they'd stopped selling the .060"-thick ones and were down to only the .020" and .040", IIRC. That was years ago and I have no idea what they sell today.

Not sure if I have any of the good ones left, either unused or used. I'd switched from stacking the tapered ones to having a nice set of thicker parts machined by the late Dan Costello a few years ago, and may have pitched the rest of the shims after that.

Re: Pedestal shims [Re: BradH] #1712077
12/19/14 03:02 AM
12/19/14 03:02 AM
Joined: Nov 2003
Posts: 1,358
Out of the State of Confusion
blue_stocker Offline OP
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Out of the State of Confusion
I called and had an interesting conversation with Michael at B3racing today and that's the direction I'm going with this project as it's more than just 'a few shims'. Check out his tech article on rocker arm geometry and Jim Miller's page as they go pretty much hand-in-hand. Great info and I'm sure many Chrysler racers and builders here on moparts would benefit from this correcting their geometry as well.

www.b3racingengines.com/MoparRockerArmGeometry1.asp

www.aera.org/engine-professional/rocker-geometry/

Re: Pedestal shims [Re: blue_stocker] #1712078
12/19/14 03:17 AM
12/19/14 03:17 AM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
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Romeo MI
Quote:

I called and had an interesting conversation with Michael at B3racing today and that's the direction I'm going with this project as it's more than just 'a few shims'. Check out his tech article on rocker arm geometry and Jim Miller's page as they go pretty much hand-in-hand. Great info and I'm sure many Chrysler racers and builders here on moparts would benefit from this correcting their geometry as well.





If it took more than .060 to get it right I milled
the stands off and made up new bolt on stands like
the race heads use... my W-5s I had to mill the pads
down for my TD rockers.. my W-9s were real nice







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