Yes that’s how I remember it: change it between runs for example but not self-activating like modern VVT setups. On May 18, 2022, at 7:38 AM, Donald Gallimore <dongallimore@xxxxxxx> wrote:
It was sold by Ed Hamburg. (the H.A.M.B. reference, though unrelated, made me remember). I was not variable through RPM, however. Just allowed you to set the advance, retard of the cam mechanically. Was an aluminum block secured to the cam, had a stop and 1/8" or so threaded rods coming in for both sides that allowed you to set the cam position and lock it in. Plock was maybe 1 1/2" by 3" by 3/8", blue anodized. I might still have it somewhere in my garage attic.
Akron Don Gallimore
On Tuesday, May 17, 2022, 06:41:35 PM EDT, dongallimore <dongallimore@xxxxxxx> wrote:
We ran something like that on our 318 back in the early 70's. It was called Vari-Cam. I think we got it from a guy in NJ. Mounted to the top gear on the camshaft.
Akron Don
Sent from my Verizon, Samsung Galaxy smartphone
-------- Original message -------- From: Bill Parker <hemirr@xxxxxxxxx> Date: 5/17/22 5:58 PM (GMT-05:00) To: 1962to1965mopars@xxxxxxxxxxxxxxxx Subject: Re: schneider cams
I found a patent granted in 2005 for a mechanical variable valve timing upper gear. It is to operate on centrifugal force acting on a pair of pivoting weights similar to the mechanical advance of a distributor. But I don’t see any information that it got produced.
Didn’t some company have a manually adjustable upper timing gear for domestic engines some years ago? You took a separate cover off to access the adjustment it seems like. Of course that wouldn’t really accomplish what we are taking about, an add-on timing set up that automatically adjusts valve timing mechanically for older drag engines. On May 17, 2022, at 5:29 PM, glpavlovich@xxxxxxx wrote:
Don Dulmage used the Racer Brown Cams and that was his “go to” profile; specifically the STH42 (254@.050”) 108LC Hyd. I have one of those in the Poly cam profile. The advancing and retarding according to engine RPM is characteristic of the Rhoades Variable Duration lifters (still marketed) that shortened duration at low RPM to retain vacuum for accessories, better idle quality for street use and then increased duration as RPM increased. Hughes Engines also has the variable duration set marketed under their name. Gary Pavlovich From: 1962to1965mopars@xxxxxxxxxxxxxxxx <1962to1965mopars@xxxxxxxxxxxxxxxx> On Behalf Of neal zimmerman Sent: Tuesday, May 17, 2022 1:17 PM To: 1962to1965mopars <1962to1965mopars@xxxxxxxxxxxxxxxx> Subject: Re: schneider cams I don't think they've made that in years. and I am not sure it was them that made it. I just remember don dulmage talking about it I don't see that advance / retard feature mentioned on their website.
But I did notice they wrote: "We are currently out of Poly Cams until further notice. As such we are limited to regrinds only at this time, on your core."
http://schneidercams.com/
Thanks, Gary H.
> -------Original Message-------
> > Looking around I was surprised to see that Schneider racing cams are > still around. > Anyway weren't they the ones that back in the day had some system > whereby your cam would actually advance or retard in relation to rpm.? > > I remember Don Dulmage here praising those cams and saying they > actually worked. > Neal Zimmerman -- > --
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