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running solid roller lifters on a hydraulic roller cam

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running solid roller lifters on a hydraulic roller cam

Postby JuicedBu » Mon Feb 19, 2007 11:51 pm

I've read some places that there's no problem in doing this and have a friend who ran one like this all last season but I'm just wondering what some of your opinions or experiances are with this. I was told to run tighter lash and my friend seemed to have good luck with this.
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Postby ACE » Tue Feb 20, 2007 7:19 am

Juiced-- Back when Johnson Lifters firsted closed their doors, roller hydraulic lifters were tough to find. Some imports hit the market and they were junk. I had 3 engines to build and dyno test, and the import roller hydraulics were having problems, and I dropped in some solids and changed pushrods and they worked fine. I tried lash @ .003, .005, & .010. I sent them out with .005 and have had no problems. Go for it.
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Re: running solid roller lifters on a hydraulic roller cam

Postby cstraub » Tue Feb 20, 2007 12:37 pm

JuicedBu wrote:I've read some places that there's no problem in doing this and have a friend who ran one like this all last season but I'm just wondering what some of your opinions or experiances are with this. I was told to run tighter lash and my friend seemed to have good luck with this.


Have done it for years with engine builder customers and camshafts.
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www.stefs.com
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Postby JuicedBu » Tue Feb 20, 2007 12:42 pm

Are there any benefits/drawbacks from doing this.
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Postby PackardV8 » Tue Feb 20, 2007 12:47 pm

Greetings, All,

No expertise here, but long experience. Back in the bad old days of primitive valve springs and the first hydraulic roller cam lobe technology, it was a bit touchy to run solids on a hydraulic profile. With today's fast action solid lifter profiles, they have little to no lash or clearance ramps built in anyway. Not as great a difference to begin with. Better valve springs are a huge help in getting away with this.

My question is, since a camshaft is such a two-dollar item in the overall cost of a performance engine today, why would anyone want less than the best possible cam profile and performance?

thnx, jv.
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Postby JuicedBu » Tue Feb 20, 2007 1:08 pm

I just have some parts laying around for a low buck build.
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Postby tjs44 » Tue Feb 20, 2007 3:17 pm

I have been running solid roller lifters on Comp Cams hyd roller cams for about 5 years.Comp told me to set them at 6 thou.You do need to run the solid roller springs.I run 200 on the seat.I have the same setup in 3 engines with quite a bit of street driving with no problems.Tom
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roller cams

Postby bigjoe1 » Tue Feb 20, 2007 6:53 pm

About four years ago, There was a class out here on the west coast where you had to run hydraulic lifters . I got trogether with my cam designer guy at Comp Cams, and we came up with a killer combo that really worked. He told me what lobe profiles to use and I put hydraulic roller lifters on a pretty stout mechanical roller profile. It would rev right up to 7500 or 7800 RPM and was no problem at all.. I have not heard of anyone going the other way (solids on a hyd profile)JOE SHERMAN RACING
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Postby tjs44 » Tue Feb 20, 2007 10:28 pm

Joe,it was Dean Harvey that had me go to solids as he did not feel comfortable running the hyd rollers on their 400 lobe lift cam at over 6500RPMs.That was on a RA V pontiac.Tom
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