thinking about putting roller rockers on my 327.
IM seriously considering/ thinking about putting roller rockers on my 327.do i have room to put 1.6 ratio or just stay with 1.5s http://garage.grumpysperformance.com/index.php?threads/louis-tool-swapping-to-1-6-1-ratio-rockers.14761/...
garage.grumpysperformance.com
Links, links and more links!
I'm new here but getting lost in the links and sub links and their links is time well spent. I've recently replaced the blown 305 in my 85 K-10 with a mystery 383, I say that because I don't know it's history. It's an odd build and I would have liked to tear into it more before dropping it in my...
garage.grumpysperformance.com
first gen SBC valve cover spacers
http://brodix.com/heads-2/small-block-chevrolet-compatible-heads/ik-series
http://www.jegs.com/i/Brodix/158/1021001/10002/-1
brodix ph# 1-479-394-1075 (ALWAYS VERIFY PART NUMBERS SEVERAL,
TIMES FROM AT LEAST TWO SOURCES, BEFORE ORDERING PARTS)
the brodix rock stud girdle is part # BR-6435 and LIST price is about $230 you can get it for less if you shop carefully
BE AWARE that the I.K. 200 heads were shipped with BOTH 3/8" and 7/16" rocker studs ,
and the poly locks for the 7/16" rocker studs ONLY fit that rocker stud girdle
obviously you need to verify what your heads have before you order the matching rocker stud girdle
KEEP IN MIND, MANY PEOPLE THAT HAVE BROKEN ROCKER STUDS HAVE FAILED TO VERIFY THE PISTON TO VALVE, CLEARANCES, ROCKER STUD TO ROCKER SLOT CLEARANCES,AND SPRING BIND CLEARANCES, etc.
it takes hundreds of pounds of force to bust rocker studs and or bend push rods, if you have those issues STOP AND LOCATE the geometry or CLEARANCE ISSUES CAUSING THE PROBLEM
theres several manufacturers and models available , heres a basic 1.5:1 ratio SBC version.
http://www.summitracing.com/parts/lun-85025
the grooved rocker pivot ball design was an effort by G.M. engineering to economically solve the issue of marginal oil flow causing rocker ball galling, and resulting noisy, or broken valve trains
http://www.summitracing.com/parts/mrg-9415/overview/make/chevrolet
http://www.summitracing.com/parts/mrg-9847/overview/make/chevrolet
http://www.summitracing.com/parts/trd-9460/overview/make/chevrolet
once you start looking for TALL CHROME CENTER BOLT VALVE COVERS youll generally find the price jumps to $180-$300 and
NARROW SELF ALIGNING ROLLER ROCKERS
http://www.jegs.com/p/Scorpion-Raci...dy-Self-Aligning-Rocker-Arms/2416814/10002/-1
BEEHIVE SPRINGS AND THE SMALLER MATCHING RETAINERS ADD ADDITIONAL VALVE TRAIN CLEARANCE
they do make a center bolt to perimeter bolt valve cover adapter.s
that allows you to run the earlier perimeter bolt valve tall valve covers on the center bolt heads
PROFORM MAKES A NICE FUNCTIONAL SET with a removable top
(NOT CHROME BUT RATHER INGENIOUS NONE THE LESS)
Got around to installing the Harland Sharp (G1100) stud girdles yesterday.
Initially I put the stud girdles on so that they were above the shoulder on the adjusting nuts. Then I put
to the top of the valve cover on with the oil baffle touching the girdle, then pushed it down until the top
was seated. This left the girdle just slightly above the shoulder. From there I tapped it with a plastic
hammer until it was just below the shoulder, giving me about 1/8 inch between the girdle and oil baffle.
Before setting the valve lash I tightened all four girdle bolts until it was getting difficult to turn the
adjusting nuts. You can see this in the video of me setting the lash on cylinder #4. After setting the valve
lash I torqued the the four bolts to 30 ft/lbs.
My aluminum plate to block the oil splash off the rocker still fit just under the new stud girdles. I was
surprised there was not a problem. It seemed with all the extra aluminum material it made it harder to
hear the clicking of the lifters when the lash was opened up until there was a clearance between the rocker
and valve stem.
or why some less expensive rocker studs break, keep in mind the rocker and push rods,
are under hundreds of ft lbs of valve spring pressure and the rocker studs deflect significantly under load,
as the lifter rides up on the cam lobe and the valve spring deflects under load,
its really a miracle more rockers and rocker studs don,t snap off.
and the video, shows clearly why rocker stud girdles add considerable valve train stability
big block chevy valve cover spacers
its very common to find you'll gain a couple horsepower with the addition of a rocker stud girdle employed,
as youll have both more precise valve train control and less deflection, Ive seen guys instantly gain an extra 150 rpm-200 rpm,
before they started feeling valve float or loss of valve train control and its certainly less stress on the cylinder head casting and rocker studs.
the one thing ID suggest is that before you buy any rocker stud girdle you ask questions, many cylinder head designs use non-standard rocker stud spacing.
CENTER BOLT SBC VALVE COVER SPACERS, LIKE
LT1/4 and vortec heads use.
THE ADAPTER ADDS ENOUGH EXTRA HEIGHT THAT MANY NARROW ROLLER ROCKERS WITH A STUD GIRDLE MAY FIT
http://www.speedwaymotors.com/Valve-Cover-Adapter-for-Center-Bolt-Heads,1890.html
http://garage.grumpysperformance.co...s-and-valve-cover-install-info.946/#post-1615
yes the steel roller rockers and the jam nuts will work, but drawmains correct the internal drippers on some cast valve covers will need to be removed , and are not necessary with roller rockers, obviously the type of valve cover dripper extension.s cast into the valve cover, and the roller rockers and jam nuts you use, or you select can vary so you.ll need to check clearances to see if any work needs to be done to add required clearance IF ITS REQUIRED
steel roller rockers like COMP CAMS AND CROWER CAMS SELL generally are stronger and smaller in size making those easier to fir and clearance and steel has at least 2-3 plus times the fatigue strength of most aluminum
http://www.harborfreight.com/10-inch-heavy-duty-end-nipper-38496.html
http://www.grumpysperformance.com/dremel.com
a set of 10" nippers and a cutting disc on a dremel tool and a careful cleaning after the modification is all thats required
http://garage.grumpysperformance.co...fit-under-stock-valve-covers.6641/#post-21035
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