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Old 03-06-2004, 05:36 PM
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Solid vs Hyd Cam choice

Ok, here's some background, 351W, rpm air gap, 670carb, ported stock iron heads, hooker comp ceramic coated headers, 8.5-8.8:1 comp depending on how much the heads get milled.

trying to decide which would be a better choice

Comp Cams 270H cam or the 270S kit.

What benifits would i have with either.

This is for my 70% street 30% strip car

thanks for the info

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Old 03-06-2004, 05:49 PM
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I would go with the 270H. The only time I recomend a solid lifter cam is when its for an engine that the goal is high horsepower and high rpms, thats going spend more time at the track than on the street. Which is not what your going for. With the hydralic cam you'll get better low end power and you won't have to adjust the valves every few thousand miles(doing that does get old after a while).


Mike
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Old 03-06-2004, 11:52 PM
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This is an age old question/debate. For the most part a solid cam makes more power across the board. If you are going to rev the engine over 6000 a solid is the way to go. If you use quality parts, rockers, push rods, lock nuts, you will not have to adjust the valves very often at all. Just check them every once in a while.

The benefits of a hyd. cam are once the preload is set you never have to touch them again and they are quieter. That's about the only things a hyd. has over a solid.

High performance car I would (and do) run a solid, for a grocery getter or daily driver I would choose a hyd.

I am not saying hyd. cams can't make power, I am just saying they don't like to rev.

Royce
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Old 03-07-2004, 01:39 PM
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what is involved with adjusting the valvetrain on the solid lifters
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Old 03-07-2004, 01:59 PM
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There are several methods, you have to pick one that you like. You basically adjust the rocker arm to give you a lash gap (between the rocker tip and the valve stem), this is done with the lifter on the base circle (valve closed). You use a feeler gauge to set the correct "lash". You have to rotate the engine over (remove all the plugs makes it easier). Like I said there are several different ways, there is a method that you can adjust all the valves in two rotations of the crank.

Most cam cards give you the hot lash adjustment. Valves can also be adjusted cold, but the lash will be a different amount that the hot lash.

Royce
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Old 03-07-2004, 02:29 PM
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would a solid cam be suitable for the street? would they make the same or better torque down low (below 2000rpm) that a hyd would make?

also would i have to do anything special to run a solid, other than new springs?
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Last edited by Dubz; 03-07-2004 at 03:08 PM.
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Old 03-08-2004, 10:15 AM
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The myth about adjusting solid lifters often is just that: a myth. While it doesnt' hurt to check them occaisonally, I have found that the need for constanst adjustment is just not there. As far as performance, it depends on the cam choice. Pick the wrong solid OR hydraulic cam, and it sucks either way.

I have used solid cams for the street since 1978. I wouldn't have it any other way.
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