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Author
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Topic: lifters
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64 TBOLT
Journeyman Posts: 20
From: Newbury NH
Registered: Jul 2003
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posted 10-19-2003 08:43 PM
   
can solid lifters be run on a hydrolic cam???------------------
64 Fairlane 460/C5
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N266fords
Gearhead Posts: 1652
From: Sierra Vista ,Az USA
Registered: Apr 2003
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posted 10-19-2003 08:47 PM
Thats a big fat no. it will wipe your cam out. BRUCE
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393Clevor
Journeyman Posts: 27
From: pittsfield, NH
Registered: Jul 2003
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posted 10-19-2003 09:01 PM
CompCams told me you could, so did the cam shop down the street from me. But who knows!!!has anyone really tried it?
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N266fords
Gearhead Posts: 1652
From: Sierra Vista ,Az USA
Registered: Apr 2003
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posted 10-19-2003 09:04 PM
well you would have to change you push rods as the geometry would be different.Bruce
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Bill3888
Journeyman Posts: 52
From: Riverside , Ca
Registered: Aug 2003
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posted 10-19-2003 09:13 PM
Don't know about this but hydraulic rollers on a cam built for solid rollers sounds reasonable when I think about it - probably would change the timing of the valve opening and closing a little (a little delayed maybe) - Good question!!
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steve'66
Gearhead Posts: 9489
From: Sonoma,CA,USA
Registered: Mar 2000
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posted 10-20-2003 12:18 AM
quote:
Originally posted by 64 TBOLT:
can solid lifters be run on a hydrolic cam???
No, But hyd lifters can be run on a solid cam.  A hydraulic cam doesn't have the take up ramp that solid lifters need. Hydraulic lifters can get by with the take up ramp of a solid cam. SteveW
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393Clevor
Journeyman Posts: 27
From: pittsfield, NH
Registered: Jul 2003
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posted 10-20-2003 12:46 PM
I just got back from Cams Northeast and while I was there I asked Ray about running solids on a hydo. He said that you can run solids all day long on a hydo but you can not use hydros on a solid cam. You also have to use adjustable vale train.Putting hydros on a solid cam the lifters can't keep up with the steep ramps ground into a solid cam.
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clevelandstyle
Gearhead Posts: 1189
From: Connersville, IN
Registered: Jul 2001
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posted 10-20-2003 01:38 PM
It looks to me like a lot of myth and legend. Has anyone actually done it? I understand both points, but I would never do either one unless in a pinch. Even then I would correct the problem and do it right as soon as possible. Why would anyone want to mix lifters on purpose? I'm a tight wad, but I ain't that tight.  ------------------
Ben
Grabber Green '70 Mach I 351C 4V
Robbin Egg Blue '79 Fairmont 351C 4V
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393Clevor
Journeyman Posts: 27
From: pittsfield, NH
Registered: Jul 2003
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posted 10-20-2003 03:43 PM
Well, I guess I'll be the first to try it. I have a XE274 cam in my truck that?s been driving me crazy for a while now. I have tried everything to quiet the valve train down I have had no luck at all. Don't bother I?ve tried everything you can imagine. So screw it I'm going to put some solids in it and give it a go. Like Ray said the cams are made from the same material so what can it hurt?
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JCQuinn@work
Gearhead Posts: 899
From: Lakewood, CO, USA
Registered: Jun 2001
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posted 10-20-2003 04:59 PM
As Steve pointed out, cams made for solid lfters have small "Take up" or clearance ramps built into them. The purpose of these ramps is to allow the valve lash to be taken up gradually instead of crashing up and down. Hydraulic cams do not have these ramps and the crashing action as the cam goes on and off of the lash setting is very hard on the cam. Hydraulic lifters come in many varieties, some may work on a solid lifter cam and some may not. Usually you are better off using matching components that are actually engineered to work together. As RPM increases, the need for matching components becoms more critical. If you use something in a manner that it was not designed for you are not the first. Sometimes it even works out. John
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