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View Poll Results: Whats Hot-----Whats not?
Hdy Roller 8 22.22%
Mech Roller 14 38.89%
Hdy Flat Tappet 10 27.78%
Mech Flat Tappet 4 11.11%
Voters: 36. You may not vote on this poll

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  #1 (permalink)  
Old 11-12-2003, 10:18 AM
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Whats hot. whats not..

Whitch Cam Type do you feel youll use in your next rebuild:




Hyd Roller

Mech Roller

Hdy Flat Tappet

Solid Flat Tappet

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  #2 (permalink)  
Old 11-12-2003, 10:40 AM
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I picked Hdy Flat Tappet cause it's stock and it works for me on my SBC 350. - I would love a Hdy Roller tho.

68
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Old 11-12-2003, 12:24 PM
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I picked a hyd tappet since the question is about "next project". I don't think I'll ever build anything as radical as I am now, and the price for a roller just wouldn't be worth it. My next project is going to be a straight cruiser that I won't have to worry about over heating and will be able to run on pump gas with no worries.
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Old 11-12-2003, 02:17 PM
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same here, nothing special no matter what it is my poncho or if i keep the camaro they're both getting just plain jane rebuilds with hi rise dual plane and maybe headers but stock heads either way.

mech. rollers are the best tho
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Old 11-12-2003, 05:50 PM
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Hyd. roller with mech roller lifters. Good power, will take the rpm, can run lighter springs.

Cstraub
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Old 11-12-2003, 07:22 PM
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I've always loved the sound of solid lifters, kinda like an engine that's run out of oil...... sweet.....
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Old 11-12-2003, 07:22 PM
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Thumbs up

Mechanical Roller is the only way to go.
Get your self a nice cam and lifter's for X-Mas.
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Old 11-12-2003, 08:44 PM
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Quote:
Hyd. roller with mech roller lifters. Good power, will take the rpm, can run lighter springs.
Why do this?

Solid lifters are lighter in comparison. Why would you use the Hydrualic cam rather then the solid grind?
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Old 11-12-2003, 08:52 PM
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The killer on mech. rollers on the street is the spring pressure when the car idles. Since you do not have the ramp rates of a mech. roller with a hyd roller you can lay back on the spring pressure. Power gain is still substantial with less friction in the valvetrain and maintenance is mild with a light lash setting needed for parts to work.

Cstraub
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Old 11-12-2003, 09:19 PM
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I thought the whole point of rollers was to eliminate the friction. Regardless of spring pressure, I'd think that you wouldn't worry about power at idle anyway, and that the loss of power by increasing spring pressure by what, 70# at most, would be almost unnoticeable. Also, the ramp rates of a mech. cam are what fill the chamber more efficiently than a hydraulic right? I'm not trying to be critical, just trying to understand.
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Old 11-12-2003, 10:40 PM
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This winter I'm going solid lift for my S-10, as someone else stated they sound cool, like a type writer. I run a special 3/8 mile oval grind in my circle track car, and it has always done good for us. Although I'm told you have to set them up more often, compared to hydraulic. As far as roller, I have never done any research on them so I don't know the ups/downs on them. I have researched the price though


bonuts
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Old 11-13-2003, 09:14 AM
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Power at idle is not the concern. The spring pressure is the same at 8000 rpm or 800 rpm, the problem is the load on the lifter at lower rpm. The pressure of the spring hammers the bearings in the roller lifters at low rpm. With a hyd. roller profile the opening ramps are not as fast so you don't need the spring load. Now with milder pressure and running a solid roller lifter you aren't hammering the bearings. Kinda best of both worlds.

Cstraub
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Old 11-13-2003, 09:45 AM
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I have been running a Mech. Roller on the street for a long time now without any problem along with many other's.

quote:
spring hammers the bearings in the roller lifters at low rpm.

NOT TRUE!
How can this be done on the bearing's in a rotating mass ?

Where do all these rumors come from ?
Person's that never used one I guess.
On GMs cars how can the get over 200, K on them.
With the Mech. roller they do NOT slam or anything else since they still make contact with the cam on closing following the cam profile, how can they hammer the bearing's ?
A .500 lift is a .500 lift and use the same spring rate.
You still need the spring pressure for the correct lift, it would be the same no matter what style of cam you use.
Please show some documentation/study showing this to be proven.
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Old 11-13-2003, 01:14 PM
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Please just call any cam company and they will
tell you they do not recommend running a solid
roller on the street. Can you yes. Is it a good idea, no.
Second why do comp and lunati and isky rebuild the lifters if there is no hammering on the bearings.
And since I just got done with a roller lifter project 6 months ago your right, I better not start any rummors. Since I have worked for 3 valvetrain mfgs in the industry, your right I better not comment, and since I'm currently working on some LS1 cam profiles for a company, I better not comment, and since I grew up in a machine shop with a SF901 and have years of R&D and practicle knowledge, I better not comment.

Spring rate is not the same for a hyd, solid, hyd roller, and mech roller at .500 Lift.
Now with that said, some of us do this for a living and some do it for a hobby, I don't pay my mortgage with a hobby.

So if you have any questions please feel free to call me at 423 854 0007.

CStraub
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Old 11-13-2003, 01:52 PM
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