340, hydrolic lifter 273 rocker solid pushrod no oil hole

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nick455440

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have a 340 put togeather, has hydrolic cam and lifters, 273 rockers, used the cup ball pushrods summit sells for this set up and the length was good, these pushrods do not have a oil hole, they are cup and ball but solid, will enough oil run down them or pool in the lifters to get and keep them pumped up with oil? Would assume so since the sell the pushrods for this set up but want to double check, thanks all
 
All LA motors, including the solid lifter 273s, all oil through an internal oil passage up to the rockers, not through the pushrods. Magnums oil through the pushrods. You'll be fine.
 
The lifters do not oil thru the pushrod.
Rockers do ONLY on Magnums only (But not Lifters)
Rocker on regular LA feed from block into heads and then
to the rocker shafts
Lifters are feed thru a large internal Passage
in the block as do many engines that
have camshafts in block.
 
Why make life hard? Just run the hydraulic rockers, push rods, and shafts, Done...
 
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Honestly if I had it to go again I would have ran stamped, picked up a few 340’s in pick, that came with two sets of 273 rockers and no stamped rockers or shafts, figured they would be easy to run, already had them ect... ordere the push rods, the the rockers were touching the springs and have bin a PITA since
 
TSB says grind the rocker for larger springs. seems to be some meat there. Mechanical rockers all the way, worth the 'hassle'. Use the solid pushrods. They dont channel any oil, thats supplied from the lifter galley directly into the lifters oil hole in the banded area.
 
pishta said:
TSB says grind the rocker for larger springs. seems to be some meat there. Mechanical rockers all the way, worth the 'hassle'. Use the solid pushrods. They dont channel any oil, thats supplied from the lifter galley directly into the lifters oil hole in the banded area.
Click to expand...
When I ground down the 273 rockers for clearance (1.47 to 1.50 springs) on our
stock eliminator cars after perhaps 20 passes the would crack around the oil
hole and if not caught in time = actually separate from the shaft.
I did run 150 to 165 on the seats of the springs = You might have less issues
with stock spring pressure!
 
Run beehives for a stiff spring. I dint know if the OP is running big spring pressures.
 
We now run Beehives on our Stocker 340/318/360
Now our seat pressures are well over 200++
As high as 7600 through the lights with Hydraulics
lifters and my finger crossed. Mid 10's with stock lift
camshaft and "Stock Engine"

Goggle: John Irving Drag Racer
 
GTX JOHN said:
When I ground down the 273 rockers for clearance (1.47 to 1.50 springs) on our
stock eliminator cars after perhaps 20 passes the would crack around the oil
hole and if not caught in time = actually separate from the shaft.
I did run 150 to 165 on the seats of the springs = You might have less issues
with stock spring pressure!
Click to expand...
Rocker would crack because of grinding stress risers, you have to grind the clearance correctly just as you would if you ground on the beams of your connecting rods, ALWAYS grind parallel to the beams of rods, rockers. Then polish the beams to get the grind marks out. Problem usually solved after that.
 
Bret Tschacher said:
Rocker would crack because of grinding stress risers, you have to grind the clearance correctly just as you would if you ground on the beams of your connecting rods, ALWAYS grind parallel to the beams of rods, rockers. Then polish the beams to get the grind marks out. Problem usually solved after that.
Click to expand...

I agree But= Just not too much metal left after the clearancing.

The Bee Hives Springs solved this.
 
I shim the lifters to have maybe .010 to .015 travel = Just to have a little cushion.
We run Schubeck lifters with the hard Ceramic pucks on the bottom. If we run them
solid = They tend to drop the pucks out with catastrophic engine ending results!
Plus the camshaft profiles I run (huge duration and stock lift) that Isky built for me
years ago are no longer available from them any more. My son in his Demon runs
tool steel lifters and a billet camshaft BUT it is a couple thousand dollar deal to buy!
 
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