Solid lifters lubrication

[Luchitosan]

Hello there !

I was collecting some info of the Ca/Vg solid lifters, and notice it doesn't have any hole for lubrication
in the top surface and the line arround it with the hole unlike the stock Hydro type.


SolidLifter-RB25 por Luchitosan, en Flickr


SolidLifterUnderside-RB25 por Luchitosan, en Flickr


botador h 1 por Luchitosan, en Flickr


botador h 2 por Luchitosan, en Flickr


botador h 3 por Luchitosan, en Flickr


Can it be that don't need it lubrication ?
Why ?
That doesn't wear down the cam ?

Thanks you !

[tommey]

There is no need for more lubrication there, everything is constantly covered in oil.. Do the stock lifters bleed oil out at the top?
If so it's a pretty logical place to bleed it out.

Just look at rb26 or 2jz, same principle.

[float_6969]

Yea, a hydro lifter HAS to have an oil inlet and outlet, so why not place the outlet under the cam. Also, hydro cam profiles have a much higher ramp rate, and would likely cause wear to the lifter/cam without an oil film being maintained. This wouldn't be necessary with a solid cam profile.

[tommey]

The solid cam ramp is much more aggressive than a hydraulic one.
A solid cam would kill a hydraulic lifter.

The hydraulic cam however often have more lift than what is stated in the "specs".

[Luchitosan]

2 things

1- Sorry but don't undestand what you mean/call "HIGHER RAMP RATE" ?
2- I think the stock lifters get the oil from the side line/hole and left in the top hole
so the cam is always lubricated

[themadscientist]

The lifters are lubed from the sides and oil splashed on the top. These are fine.

[float_6969]

The solid cam ramp is much more aggressive than a hydraulic one.
A solid cam would kill a hydraulic lifter.

The hydraulic cam however often have more lift than what is stated in the "specs".

You're right, I had them backwards.

[mdb4879]

Ramp rate is how fast the cam opens the valve. Think of it like a hill (or a ramp since we're talking about ramp rate ). A low angle/gradient will require less effort over a given distance, but will take longer to get to the top (hydraulic cam). A steep gradient will get you to the top faster, but the trip will be harder to make (solid cam). Because of this, a solid cam with the same duration will actually open the valve more sooner and can remain at peak lift for a longer period of time. The duration at any given lift will also be increased for a given advertised duration.

A hydraulic lifter couldn't withstand the harsh nature of a solid cam.

[Luchitosan]

Thanks I couldn't translate exactly my self !
Now I know is the same rule of any "racing" cam and solid lifters.

I'm tired of hydro lifters issues I analysing made customs solids and cams just for test it
I'm not in need for reving 9k rpm only 8000 or 8200 rpm with stock rods...