Variable Rocker Arm

speedtalk · Post by **speedtalk** » Wed Mar 10, 2004 1:56 pm

What the...

http://www.hotrocker.com

rmbuilder · Post by **rmbuilder** » Thu Mar 11, 2004 4:18 pm

Admittedly I have not looked closely at the engineering of this product but the first word that came to mind was "durability". The load on the fulcrum point with a big cam and the required spring pressures must be enormous.
Bob

Denzil · Post by **Denzil** » Thu Apr 22, 2004 2:42 pm

Doesn't Crane have a similar product they are marketing now?

After looking at the site, it looks like they are swinging the rocker ratio variation a lot more than the Crane product. If I remember correctly, the Crane rocker only varies by about .5 total ratio. I've never used them, but it is an interesting concept.

Lasher... · Post by **Lasher...** » Thu Apr 22, 2004 3:37 pm

Crane has their new shaft rockers that have the pushrod seat lowered to alter how the rocker responds to the pushrods movement.... acts like a 1.7 in th lower lift area and 1.6 in the mid lift and up range..... are those the Crane's you were refering to ? .... Or something else ?

As for the picture above ..... I have to wonder what a Super Stock or Comp Eliminator type cam would do to that mechanism ?

Way back when Ford used to have a rocker that had a spring loaded plunger that would take up the lash and be nearly as quiet as a hyd cam....But was only used on a 6 cyl shaft rocker set up of the early 50's I belive.... Not a race item. Didnt last long in production after hyd cams became common.

Denzil · Post by **Denzil** » Thu Apr 22, 2004 5:13 pm

Crane has their new shaft rockers that have the pushrod seat lowered to alter how the rocker responds to the pushrods movement.... acts like a 1.7 in th lower lift area and 1.6 in the mid lift and up range..... are those the Crane's you were refering to ? .... Or something else ?

Yup. That is what I was referring to.

As for the picture above ..... I have to wonder what a Super Stock or Comp Eliminator type cam would do to that mechanism ?

I guess I'll keep it simple. I can't imagine that it wouldn't destroy it in short order. Maybe I'll give them a call or email and see what they say...