I can't find it in the archieves, but I recall someone here who has done this. Wondered if he'd pipe back in and give us an update. It was obviously a roller setup, but am very curious as to how it's working out. I seem to remember him lashing the valves at .006". Someone refresh my old memory please. Tony A. graemlins/beers.gif

He posted here and over at DRR that there was a performance increase, I'm thinking they were almost lashed at zero.

Solid cams will almost always provide better power output. Putting solid lifters on a hyd ground cam is no problem.

A hydro cam does not have the clearence ramps that a solid cam does. Get the correct type of cam for the type of lifter you have.

I saved this from UDHArold b/c I was bugging everybody about a small solid cam for my 283 motor!!

"Paul,
Get a 274H, 274 at .006, 226 at .050, 137 at .200, and .468" valve lift. This is a hydraulic cam.
Run solid lifters with about .006" valve lash. I have done this for years with this family(In SCCA road racing, they have a class allowed solids, but only .500" gross valve lift. This family gives .499" lift in 5.0L Fords, and have dominated the class for a number of years, using 241 or 250 at .050 cams.)
The 274H comes close to the 268HE. Another one is the 280H, 223 at .050, .463 valve lift. Same .006" valve lash. The 280H is the 288H's little brother.
And so now it's bed for me. I'll answer tomorrow....

UDHarold"

pdq67

Doug Herbert has a couple cams that are advertised as hydrauilc or solid lifter cams. They dont come right out and tell you but the part # is exactly the same. But this isnt true for all their cams just a few.

search Big Red L72

Mike Feudo, solid/hydro cams use the same bore lifter, and flat on the bottom. There is no difference, other than possible material, between the mating surfaces.

What you said is actually backwards, a hydro cam has less steep ramps, than a solid, as to not collapse the hydraulic insides, which would make it even MORE okay to run solid lifters.

Originally posted by Twilightoptics:
Mike Feudo, solid/hydro cams use the same bore lifter, and flat on the bottom. There is no difference, other than possible material, between the mating surfaces.

What you said is actually backwards, a hydro cam has less steep ramps, than a solid, as to not collapse the hydraulic insides, which would make it even MORE okay to run solid lifters. =
Paul,
Mike is correct, solids have longer slower clearance ramps & hydraulics have almost no clearance ramp.
They do have a gentler closing side than opening side ramp though so the valve doesn't bounce as bad as it will by just dropping it on the seat.

Wait a second. After all my solid cam research in finding that the ramps are more steep on a solid, causing the valve to open faster, that's not true?

Now I'm royally confused. Maybe I misunderstand the term? If so I apologize for posting wrong information!

Isn't it not so much the ramps on a solid cam are steeper, but rather ever so slightly not as aggressive as the hy-cams and then once the lifter and valvetrain has taken up the lash/slack and is tight, then the solid's lobe can be made way more aggressive b/c the solid lifter won't callapse like a hy-lifter??

I say this b/c a hy-lifter can cushion the shock created by a more agressive ramp, but can't support it going past it up an aggressive lobe like the solid can..

I have heard this many times discussing this stuff in the past. "A solid cam can knock h-ll outta the lifter once she's moving" sorta deal..

pdq67

The actual ramp on the solid camshaft is more aggressive over the important part of the lift curve, and it creates more area under the curve of valve lift. But initially, the very beginning of the ramp(clearance ramp) the ramp in the solid cam has a more gradual adjustment off of the base circle. This is because there is no hydraulic action or give in a solid lifter. If you tried to immediately transition from no lift on the base circe to a full steep ramp, it would be very hard on the cam lobe and lifter. When the solid lifter first starts riding on the lobe, the valve does not move yet due to the lash, and that small area at the beginnig of the lobe is more gradual and slow, but once the lifter gets going on the lobe, the lobe is in fact more aggressive.
when wolfplace said
"Mike is correct, solids have longer slower clearance ramps & hydraulics have almost no clearance ramp. They do have a gentler closing side than opening side ramp though so the valve doesn't bounce as bad as it will by just dropping it on the seat."

he was not talking about the charactoristics of the whole solid lifter cam lobe, just the clearance ramp. This is why you wont always safely and happily get away with running solid lifters on a hydro cam, cause the solid lifter wants a softer clearance ramp to get started that you wont find as often with a hydro ground lobe.

I understand now! So I was sort of right. Thanks for settin me straight guys! redface.gif )