Thread: yella terra rockers
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12-21-2009 02:32 AM #1
yella terra rockers
Anyone had any experience of the Yella Terra rockers? I suppose you could say they are a "semi shaft" type of rocker. One good thing (from my point of view) is that it looks like they will fit under the factory valve covers (454 Mk IV).
Chris
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12-21-2009 06:41 AM #2
well they sell them under PBM .i have look at there rocker shaft for the bbc .the stock stud rocker s work very well and with a 5/16 gasket will clear with a crane gold rockers @ 620 + lift .if that why your looking at a set .i never used a set for a customers engine .i would look at T@D or jesel .or crower now make a shaft rocker. why do you think the shaft is that much better ? for the money there not that much better on lower spring lbs when you put a roller rocker on a stud you have a semi shaft rocker .now if you going to run well over 800 open like the springs i just put on a set of bbc heads and 380 on the seat stud will just not take the load then its a T&D or the others i listedIrish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
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12-21-2009 11:50 AM #3
I'v run there 144-250 Ford 6 rockers. they were very high quality but they were also $600 ( imported into the US )You don't know what you've got til it's gone
Matt's 1951 Chevy Fleetline- Driver
1967 Ford Falcon- Sold
1930's styled hand built ratrod project
1974 Volkswagen Super Beetle Wolfsburg Edition- sold
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12-22-2009 08:05 AM #4
What I like is that they are adjusted on the pushrod cup at the end of the rocker instead of that big high poly-lock sticking up thru the middle of the rocker on the end of the stud. Also, the pedestal design looks even more rigid that a stud, though I'm not using very high pressures (155/377). It seems they will fir under my stock valve covers, and they are a LOT cheaper than the true shaft rockers by Jesel, Crower, T&D etc.
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12-22-2009 05:06 PM #5
but like i said go back and read post 2 your stock stuff will work fine. it will fit under you short valve covers. it s not like i never have done it you are thinking you can adjust on the push rod side this maybe true as well as the same as a T&D .jesel . crower . ETC ....BUT...... your going to have to work your mild lift out to get the right push rods as there a good chance..THEY WILL NOT..... be the same as that you have now for size. the adjust is about good for no more then a turn or so. not for fixing bad geometry. i know there cheaper then others shaft set ups .but whats cheaper is studs. i have had many shaft sets new and used . i have car s that run in the mild 8s and 9s with studs and roller rockers. cars .truck.boats. that run in water .mud.dirt. snow any thing you can think of i built or help with the builds. studs will work fine were they do not work good at is very hi spring LBS like 340+ and open 1255 LBS.i am sure there is guys running faster with stock bbc stud mount rockers but .i know this first hand with the engines i build running much more spring at hi RPMs sounds like want a set so you should have a set. i am just saying for the money and your time getting them set up your stud rockers are more then fine. good luck
Last edited by pat mccarthy; 12-23-2009 at 05:24 PM.
Irish Diplomacy ..the ability to tell someone to go to Hell ,,So that they will look forward to to the trip
Welcome to CHR. I think that you need to hook up your vacuum advance. At part throttle when cruising you have less air and fuel in each cylinder, and the air-fuel mixture is not as densely packed...
MSD 8360 distributor vacuum advance