I've been keeping up with developments involving the Barry Grant/Triple D Induction 3 valve heads and came across this pic after doing a search today:


http://www.competitionplus.com/2005_..._products.html

Info about these heads is trickling out at molasses speed. The sales rep at Barry Grant's main headquarters I spoke to a month ago wouldn't give me the time of day other than to tell me that patents are still waiting approval but the timeframe for when they expected production to begin was late August/early September.

My impressions:

- Cycle bending fatigue past a certain camshaft lobe lift might be a problem with the rocker perches. This assumption is also reinforced by this excerpt from the ad:

"On mildly tuned applications, higher valve lifts are unnecessary as low valve-lift flow is dramatically improved."

- The lack of linear symmetry on a few of the springs make me hope they're just mock ups.

I'm curious to hear other's thoughts on what they see here.

 

Why only 3 valves? How much harder would it have been to do 4? I would assume that you could duplicate the intake valve setup for the exhaust side, maybe decrease valve diameter a bit to do it.