Solid roller lifters on hyd. roller cam

What if I ran some solid roller lifts on my stg III TFS hyd roller cam. Would the cam break, or would the fast ramps break a springs even if the springs were for solid rollers? I can't imagine that my tfs cam is more radical "steeper ramps" than my solid roller in my drag car.

the hyd will have softer ramps than a mech cam, you can run a solid lifter on that cam and not have a problem, the other way around and it would colapse the lifter. the hyd with the slower acceleration rate is also nicer on parts [img]/phpBB/images/smiles/icon_biggrin.gif[/img]

You can do it, but i would bet you gain no power, and probably lose some due to the drop in lift/duration with the lash.

Running a solid lifter on a hydraulic cam is a good way to ruin perfectly good parts. Here's why: A solid cam has what are called clearance ramps ground into the lobes. A solid cam needs clearance or lash. If the cam lobe suddenly pops the valve open, this abrupt transition from the .025" or whatever clearance to pushing the valve open is like hitting the valve, etc. with a big hammer. To prevent this, the cam lobe starts out with a gradual slope on the lobe to take up the clearance in the valve train, then transitions into the aggressive profile of a solid cam. Since the hydraulic lifter runs with zero lash or clearance, the cam lobes do not have this clearance ramp ground in, they just go right to opening the valve without the cushioning effect of the clearance ramp. Put solid lifters on a hydraulic cam and your engine will sound like the proverbial threshing machine! Unless maybe you can run .001 or .002" lash.

I think I'll try it out.....The hyd roller has "softer" ramps to keep from collasping the hyd rollers.

Wouldn't that cause me to run a decreased amount of valve lash? maybe .012 instead of .020???

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On 2002-11-26 01:08, SCOTT wrote:
I think I'll try it out.....The hyd roller has "softer" ramps to keep from collasping the hyd rollers.

Wouldn't that cause me to run a decreased amount of valve lash? maybe .012 instead of .020???
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yes... this is pretty much the theory behind many of the new "tight lash" solid cams put out by the big cam companies.

This is a little off subject but I found this out from Compcams when I was researching my cam:
The smaller CompCams Xtreme Solid Street Roller lobes could be used with hydraulic roller lifters, but spring pressures would have to be decreased about 10%. A solid lifter setup will give better overall performance over the hydraulic though, because the solid lobes are more agressive and designed for a lash setting.

I'm not sure if the hydro cam would work with solid lifters, but CompCams would have the answer I'm sure. [img]/phpBB/images/smiles/icon_smile.gif[/img]
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Why don't you just adjust the hydraulic lifters with zero preload or .001 to .002 lash. No pump up can occur with this adjustment. Sometimes you have to buy hydraulic lifters designed for this lash though rather than using your existing lifters.
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I don't have any hyd roller lifters and I don't fill like paying over $400 for some that can handle this cam. I bought some crane 1.6 gold 7/16 rockers and solid link bars roller lifters for $200 off E-bay......Anyway, the factory stang lifter/h-bar junk wont work with .595 lift cam without binding and breaking the h-bars......So I'm going to run the cam with solid roller lifters.....

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On 2002-11-26 11:56, SCOTT wrote:
I don't have any hyd roller lifters and I don't fill like paying over $400 for some that can handle this cam. I bought some crane 1.6 gold 7/16 rockers and solid link bars roller lifters for $200 off E-bay......Anyway, the factory stang lifter/h-bar junk wont work with .595 lift cam without binding and breaking the h-bars......So I'm going to run the cam with solid roller lifters.....
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Let us know how it worked out.
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