Roller rockers....Aluminum vs. Stamped? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 12-01-2005, 03:59 PM
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Roller rockers....Aluminum vs. Stamped?

Looking at roller rockers out there, and with so many of them on the market I would like to get your valuable opinions.

I know the aluminum are easier on the valve-train so I've heard due to less weight. With that being said how are the stamped roller rockers?

Biggest thing I guess that I am looking at is cost/ performance.

Can I get the same performance if not close to the same without using aluminum?

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Old 12-01-2005, 04:15 PM
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In my opinion the stamp rockers, or even the steel roller rockers are a better choice. You would not notice the difference in performance. Also, over the years the aluminum ones have had problems from breaking and coming apart. Unless you want to keep checking their condition every few weeks, go with the steel
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Old 12-01-2005, 04:26 PM
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Thats kinda the decision I was forming. I've heard of aluminum debris in the valvetrain and excessive noise also. (this of course the downside I've read of aluminum)
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Old 12-01-2005, 05:08 PM
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Hold on a minute. Aluminum rockers do not fall apart, etc... You can run a set for years with no problem, just don't buy garbage. I have run aluminum rockers for years and have never had them fail (not even the cheap ones, they are just noisey).

I have never seen a set of "stamped" steel roller rockers. Please tell me where you saw these. There are stamped steel "poller" tip rockers. In that case the only advantage they have over stock rockers is that they will have a more accurate ratio, they do not reduce friction, etc...

Now there are chromoly and stainless steel roller rockers, these are nice pices but, they will cost you. I am currently running chromoly rockers, I didn;t buy them because I thought ther were stronger or would last longer. I liked the design and the fact that they are rebuildable.

I don't like to see anyone being misled. You do not have to "check aluminum rockers" every few weeks. I ran the same set for sveral years and never even took the valve cover off (hyd cam). When I upgraded the engine, I sold the rockers which were still in good working order, and these were not top of the line rockers they were cheapies.
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Old 12-01-2005, 06:01 PM
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Quote:
Originally Posted by camaroman7d
Hold on a minute. Aluminum rockers do not fall apart, etc... You can run a set for years with no problem, just don't buy garbage. I have run aluminum rockers for years and have never had them fail (not even the cheap ones, they are just noisey).

I have never seen a set of "stamped" steel roller rockers. Please tell me where you saw these. There are stamped steel "poller" tip rockers. In that case the only advantage they have over stock rockers is that they will have a more accurate ratio, they do not reduce friction, etc...



I don't like to see anyone being misled. You do not have to "check aluminum rockers" every few weeks. I ran the same set for sveral years and never even took the valve cover off (hyd cam). When I upgraded the engine, I sold the rockers which were still in good working order, and these were not top of the line rockers they were cheapies.
I agree with you 100% I have been using aluminum rockers for 5yrs and will continue to due so in any engine i build, never had to adjust them once installed! I use the cobra brand! they are around $220.00 set of 8. I can give you the company info if you like?
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Old 12-01-2005, 06:09 PM
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Quote:
Originally Posted by camaroman7d
I have never seen a set of "stamped" steel roller rockers. Please tell me where you saw these. There are stamped steel "poller" tip rockers. In that case the only advantage they have over stock rockers is that they will have a more accurate ratio, they do not reduce friction, etc...
http://store.summitracing.com/defaul...0&autoview=sku

Rocker Arm, Stud Mount, Roller Tip, Stamped Steel, 1.6 Ratio, Fits 3/8 in. Stud, Chevy, Small Block

Not that I have anything to add other than the link, I'm only here to watch
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Old 12-01-2005, 06:15 PM
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Those are just roller tipped rockers. Thats not really comparible with the aluminum rollers.
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Old 12-01-2005, 06:16 PM
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Quote:
Originally Posted by Jake_Dragon
http://store.summitracing.com/defaul...0&autoview=sku

Rocker Arm, Stud Mount, Roller Tip, Stamped Steel, 1.6 Ratio, Fits 3/8 in. Stud, Chevy, Small Block

Not that I have anything to add other than the link, I'm only here to watch
Those are "roller tip", not full roller rockers. They still use the pivot ball just like regular rocker arms do.

Vince
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Old 12-01-2005, 06:22 PM
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As already pointed out by others and as I stated in my original post, roller "TIP" and "FULL" roller are two different things.

Royce
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Old 12-01-2005, 06:47 PM
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great opinions

Thanks thats exactly what I wanted........opinions from people that have used them. I'm guessing then those other aluminum rockers that I read about with the debris were Proform or something cheaper.

I didn't think about the piviot ball, just the tips. Thanks for pointing out that oversight!
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Old 12-01-2005, 07:29 PM
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my bad sorry
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Old 12-01-2005, 07:30 PM
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Ive een wondering the same question, what about a set like these uesed or new http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT vs the http://store.summitracing.com/defaul...0&autoview=sku



I'm looking at these 4 a 400+ HP SBC 383 Stroker


Mustangsaly
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Old 12-01-2005, 07:57 PM
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Ive ran both types roller tip and full roller. I like comp cams roller tip rocker very strong. I read a rocker arm shootout in one of my old mags. Roller tip rockers gained several hp over stamped steel rockers. Then they installed full roller rockers an the same engine 0 hp gain. I don't know how true this is, but it was published in Super Chevy a couple years ago. I suppose if the engine made over 5 or 600 hp then you may see gains in hp with full roller. The engine in Sup Chevy was a little over 450 hp. Heres how comp cams describes the magnum steel rocker......Magnum Roller Rocker Arms are:
STRONG: Magnum Roller Rocker Arms are made from 8620 chromemoly steel. This makes them stronger than die cast aluminum or stamped steel rockers. This superior material, along with the Magnumís super stiff design, assures maximum lift because this rocker arm will not flex.
ACCURATE: You canít get maximum horsepower from your engine if your rocker ratio is off. Other rockers have been checked and found that they were as much as .040'' short on lift. The Magnum Rockers are super accurate. They check dead on every time.
POWERFUL: The Magnum Roller Rockers can make between 15 and 30 horsepower over other rockers! Why? The secret is that not only does the roller tip reduce friction, the Magnum Rockers incredibly stiff design and super accurate ratios yield more effective valve lift.
DURABLE: The roller tip design reduces friction by not scrubbing the valve end or pushing the valve stem hard against the valve guide. This in conjunction with super strong design of the rocker makes for a simple, bulletproof, and cost effective combination.

Last edited by 67 Deuce 4 Me; 12-01-2005 at 08:04 PM.
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Old 12-01-2005, 11:47 PM
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I didn't want to mention names, but the Proform rockers are the "junk" ones I was talking about. I don't know if they have started making better ones or not. The last time I had a set in my hands was a couple years ago.

67 Duece, That is the point I was making about the stock rockers vs. the roller tip. It's the more accurate lift that gives them an advatage over the stockers.

There is one common mis-conception the roller tip does not actually roll, there is no bearing in the tips. The tip slides just like standard rockers. The reason is there is so much force on the tips that there is less resistance for them to slide (while covered in oil) over the tip of the valve. There was a study where a high speed camera was used and it proved this point. I can't find that info on the web though.

You have to take what you read in magazines with a grain of salt, they will tell whatever the manufacture tells them to.

One of the advantages of full roller rockers is supposed to be less heat in the oil. Also when spring pressures and lifts start getting higher the roller fulcrum will have an advantage over a ball and socket (stock or roller tip).

I am not saying everyone should go out and buy roller rockers and I probably wouldn't have even responded to this post, but the first reply was very mis-leading and were not based on facts.

Royce
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Old 12-02-2005, 01:23 PM
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rockers

Whats the application????

pick-up truck??? race car??? 300hp??? 800 hp????

Keith
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