U can easily change the lifters and pushrods in the 67 and back big blocks to the 68 up. The pushrod seat is .075 thou lower in the bb lifter. But now the aftermarket has made them the same. Kim
Solid lifter input
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I know dat, G. I was just lettin others know there are some differences, yo.
512Stroker
We are all here because we are not all there.
Kim that's good to know
The deeper seat may have an advantage for geometry of the push rods if it were needed.
If you could find them.
pishta
I know I'm right....
the later lifters on that break had a 3/8 ball seat while the older ones had a 5/16 seat iirc.
take a straight edge across journals on a stock cam, note distance to highest lobe. now take that monster .630 lift and do the same...there is your lifter difference out the bore. not much eh? No matter the lift on a stock bearing cam, the lobes still have to fit through them!
Thats probably a misconception that the bands get exposed on high lift cams. they should move the band up so it doesnt get dropped out the bottom! And Why the heck are the banding solid lifters anyway? There is no oil hole to unshroud....? Stupid lifter companies...what do they know ? Pshhh....
take a straight edge across journals on a stock cam, note distance to highest lobe. now take that monster .630 lift and do the same...there is your lifter difference out the bore. not much eh? No matter the lift on a stock bearing cam, the lobes still have to fit through them!
512Stroker
We are all here because we are not all there.
Good point, why is the oil band there on a solid flat tappet that has no push rod oiling? Do manufactures use the same tappet body for both solid and hydraulic tappets?
It’s there to help lube the lifter and the lifter bore. Kim
512Stroker
We are all here because we are not all there.
That what I always thought, but you can buy .904 solid tappets without the oil band. How does that work for oiling?
Most solid Chrysler lifters are not just a hunk of solid metal. They have a plunger, too, just not a hydraulic plunger, but an oil metering plunger and they need to be lubricated as well. Their plunger is not spring loaded and regulates the flow of oil. You can tell an oil metering lifter by shaking it and hearing the plunger rattle. Since they're not spring loaded, the plunger moves freely. The oil metering solid lifters are actually the preferred lifters for solid flat tappets, IMO.
Sure. Look at the Comp 821-16. Solid hunks of metal with no band.
Just like the aftermarket deleted the groove in the rod cap to oil the cylinder walls. It was deemed not necessary. Kim
Yeah but I still like them in there. lol
PRH
Well-Known Member
I didn’t do any trouble shooting to see exactly what the problem with them was.
A friend had some of the “normal” lifters at his shop, so I swapped those in without even pulling the intake manifold off.
The problem was solved, so I forged ahead.
My “assumption” was that they were too low in the bore and oil was running out the bottom.
Well..... more correctly....... the bottom of oil band was too low in the bore, creating a path from the oil gallery right back into the crankcase.
With those lifters in the motor it basically had zero oil pressure.
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