anyone tryed hotrockers

[Len Sabatine]

     Tinkering with Rocker Ratio is nothing but another tuning avenue. Used in
     conjunction with knowledge of actual port flow mapping and cam lobe 
profile,
     alterations to torque curve shape are possible. What really makes 
things happen
     is making the port take off quicker @ low and mid lift. If the port 
flow curves aren't
     known from actual flow bench testing , then results are going to be 
less than
     optimal. More rocker usually makes even mediocre flowing ports a bit 
better.
     Actual duration change is nil.
     Len

>Seeing as how higher-ratio rockers also change the duration (especially as
>measured at lower numbers, like 0.002" or 0.006"), maybe that needs to be
>included in the changes that you're inputing into Desktop Dyno.  I can't
>tell you how to calculate those changes, though.
>
>Seems to me that such a system would be of limited use.  I'm not sure why
>one wouldn't want to run the higher ratio all the time, since it doesn't
>really affect velocity in an adverse fashion.  I'm with you - I'd rather
>sink the money into other parts.
>
>Kinda a neat idea, though.
>
>Eric Bryant
>mailto:bryante at ghsp.com <mailto:bryante at ghsp.com>
>http://www.novagate.com/~bryante <http://www.novagate.com/~bryante>
>
>-----Original Message-----
>From: David & Cheryl Haggard [mailto:david at newcovenant.com]
>Sent: Wednesday, June 20, 2001 3:44 PM
>To: gmecm at diy-efi.org
>Subject: RE: anyone tryed hotrockers
>
>
>     Nuttin' wrong with being a newbie. We all were once. I think I still am.
>     I'd like to see Jim McFarland's article on this, before I passed
>judgment. However, running some quick Dyno2000 sims on my build doesn't look
>promising. But the Hotrockers website does throw the caveat that your
>engine's heads must be such that they will respond to higher lift. The flow
>tests on my heads indicate that for my power range and camshaft, more or
>less lift gives minimal return.
>     Articles in Car Craft, Hot Rod, and others confirm this. Not all engines
>respond dramatically to changes of rocker ratio. Others do. Until the
>Hotrockers maker comes up with some sort of guide to help you tell ahead of
>time whether they will help your engine or not, I'd sink my 930 bucks into
>other parts.
>
>Dave Haggard
>    1988 Formula Firebird
>    305 2 X 2-bbl CFI (under construction)
>    http://www.newcovenant.com/firebird/
><http://www.newcovenant.com/firebird/>
>
>
>-----Original Message-----
>From: owner-gmecm at diy-efi.org [mailto:owner-gmecm at diy-efi.org]On Behalf Of
>HitManSmurf at aol.com
>Sent: Monday, June 18, 2001 10:55 PM
>To: gmecm at diy-efi.org
>Subject: anyone tryed hotrockers
>
>
>Click here: HOTROCKER! <http://www.hotrocker.com/>  there somewhat like v v
>t but uses pushrods i think
>it looks like a great idea .hate to be a newbie but just want to contribute
>
>    the hitman
>
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